/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:45:05,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:45:05,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:45:05,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:45:05,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:45:05,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:45:05,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:45:05,440 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-Separate.epf [2021-06-05 16:45:05,476 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:45:05,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:45:05,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:45:05,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:45:05,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:45:05,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:45:05,480 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:45:05,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:45:05,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:45:05,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:45:05,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:45:05,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:45:05,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:45:05,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:45:05,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:45:05,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:45:05,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:45:05,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:45:05,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:45:05,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:45:05,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:45:05,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:45:05,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:45:05,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:45:05,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:45:05,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:45:05,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:45:05,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:45:05,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:45:05,483 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:45:05,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:45:05,484 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:45:05,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:45:05,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:45:05,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:45:05,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:45:05,817 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:45:05,819 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:45:05,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-06-05 16:45:05,819 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-06-05 16:45:05,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:45:05,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:45:05,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:45:05,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:45:05,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:45:05,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:45:05,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:45:05,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:45:05,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:45:05,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/1) ... [2021-06-05 16:45:05,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:45:05,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:45:05,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:45:05,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:45:05,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (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 [2021-06-05 16:45:05,956 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:45:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:45:05,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:45:05,956 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:45:05,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:45:05,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:45:05,957 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:45:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:45:05,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:45:05,957 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:45:05,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:45:05,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:45:05,958 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:45:06,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:45:06,197 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:45:06,199 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:45:06 BoogieIcfgContainer [2021-06-05 16:45:06,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:45:06,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:45:06,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:45:06,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:45:06,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:45:05" (1/2) ... [2021-06-05 16:45:06,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5395f9b and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:45:06, skipping insertion in model container [2021-06-05 16:45:06,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:45:06" (2/2) ... [2021-06-05 16:45:06,205 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-06-05 16:45:06,209 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:45:06,209 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:45:06,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:45:06,210 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:45:06,293 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:45:06,327 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:45:06,365 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:45:06,365 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:45:06,365 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:45:06,365 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:45:06,365 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:45:06,365 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:45:06,365 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:45:06,366 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:45:06,373 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-06-05 16:45:06,420 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:06,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:45:06,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:06,441 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:06,442 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:06,448 INFO L82 PathProgramCache]: Analyzing trace with hash -894934944, now seen corresponding path program 1 times [2021-06-05 16:45:06,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:06,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612558084] [2021-06-05 16:45:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:06,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:06,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612558084] [2021-06-05 16:45:06,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612558084] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:06,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:06,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 16:45:06,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379080094] [2021-06-05 16:45:06,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:45:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:06,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:45:06,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:06,830 INFO L87 Difference]: Start difference. First operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 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 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:06,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:06,974 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-06-05 16:45:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:45:06,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 [2021-06-05 16:45:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:06,991 INFO L225 Difference]: With dead ends: 349 [2021-06-05 16:45:06,992 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 16:45:06,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 16:45:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-06-05 16:45:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.482876712328767) internal successors, (725), 292 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-06-05 16:45:07,045 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-06-05 16:45:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:07,046 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-06-05 16:45:07,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-06-05 16:45:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:45:07,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:07,048 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:07,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:45:07,051 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:07,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1198566966, now seen corresponding path program 2 times [2021-06-05 16:45:07,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:07,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980092371] [2021-06-05 16:45:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:07,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980092371] [2021-06-05 16:45:07,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980092371] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:07,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:07,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 16:45:07,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665029534] [2021-06-05 16:45:07,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:45:07,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:45:07,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:07,180 INFO L87 Difference]: Start difference. First operand 293 states and 725 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:07,270 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-06-05 16:45:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 [2021-06-05 16:45:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:07,275 INFO L225 Difference]: With dead ends: 333 [2021-06-05 16:45:07,275 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 16:45:07,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 16:45:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-06-05 16:45:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3926940639269407) internal successors, (524), 219 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-06-05 16:45:07,300 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-06-05 16:45:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:07,300 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-06-05 16:45:07,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-06-05 16:45:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:45:07,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:07,302 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:07,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:45:07,302 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:07,303 INFO L82 PathProgramCache]: Analyzing trace with hash -602461050, now seen corresponding path program 3 times [2021-06-05 16:45:07,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:07,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579875719] [2021-06-05 16:45:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579875719] [2021-06-05 16:45:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579875719] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:07,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:07,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 16:45:07,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276547774] [2021-06-05 16:45:07,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:45:07,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:07,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:45:07,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:07,462 INFO L87 Difference]: Start difference. First operand 220 states and 524 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:07,525 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-06-05 16:45:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:07,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 [2021-06-05 16:45:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:07,532 INFO L225 Difference]: With dead ends: 320 [2021-06-05 16:45:07,532 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 16:45:07,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 16:45:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-06-05 16:45:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.3824884792626726) internal successors, (517), 217 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-06-05 16:45:07,555 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-06-05 16:45:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:07,555 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-06-05 16:45:07,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-06-05 16:45:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:45:07,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:07,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:07,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:45:07,556 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:07,557 INFO L82 PathProgramCache]: Analyzing trace with hash -630863238, now seen corresponding path program 4 times [2021-06-05 16:45:07,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:07,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471351328] [2021-06-05 16:45:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:07,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471351328] [2021-06-05 16:45:07,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471351328] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:07,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:07,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 16:45:07,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913549684] [2021-06-05 16:45:07,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:45:07,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:07,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:45:07,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:07,680 INFO L87 Difference]: Start difference. First operand 218 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:07,745 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-06-05 16:45:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:45:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 [2021-06-05 16:45:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:07,747 INFO L225 Difference]: With dead ends: 327 [2021-06-05 16:45:07,747 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 16:45:07,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 16:45:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-06-05 16:45:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3866666666666667) internal successors, (537), 225 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-06-05 16:45:07,763 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-06-05 16:45:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:07,764 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-06-05 16:45:07,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-06-05 16:45:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:45:07,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:07,765 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:07,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 16:45:07,765 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:07,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2144128130, now seen corresponding path program 5 times [2021-06-05 16:45:07,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:07,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929279616] [2021-06-05 16:45:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:07,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929279616] [2021-06-05 16:45:07,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929279616] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:07,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:07,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 16:45:07,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153219587] [2021-06-05 16:45:07,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:45:07,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:07,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:45:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:07,937 INFO L87 Difference]: Start difference. First operand 226 states and 537 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:08,019 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-06-05 16:45:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 [2021-06-05 16:45:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:08,021 INFO L225 Difference]: With dead ends: 333 [2021-06-05 16:45:08,021 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 16:45:08,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 16:45:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-06-05 16:45:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4356846473029043) internal successors, (587), 241 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-06-05 16:45:08,031 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-06-05 16:45:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:08,031 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-06-05 16:45:08,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:08,031 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-06-05 16:45:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:45:08,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:08,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:08,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 16:45:08,032 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash 909995578, now seen corresponding path program 6 times [2021-06-05 16:45:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:08,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087822789] [2021-06-05 16:45:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:08,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:08,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087822789] [2021-06-05 16:45:08,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087822789] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:08,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:08,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 16:45:08,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475903992] [2021-06-05 16:45:08,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:45:08,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:08,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:45:08,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:08,160 INFO L87 Difference]: Start difference. First operand 242 states and 587 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:08,238 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-06-05 16:45:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 [2021-06-05 16:45:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:08,241 INFO L225 Difference]: With dead ends: 337 [2021-06-05 16:45:08,241 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 16:45:08,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 16:45:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-06-05 16:45:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.3856502242152464) internal successors, (532), 223 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-06-05 16:45:08,256 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-06-05 16:45:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:08,257 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-06-05 16:45:08,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2021-06-05 16:45:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-06-05 16:45:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:08,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:08,259 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:08,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 16:45:08,259 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:08,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2086549228, now seen corresponding path program 1 times [2021-06-05 16:45:08,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:08,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770047810] [2021-06-05 16:45:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:08,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:08,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770047810] [2021-06-05 16:45:08,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770047810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:08,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808801135] [2021-06-05 16:45:08,305 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 [2021-06-05 16:45:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:08,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:45:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:08,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808801135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:08,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:08,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 16:45:08,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909321715] [2021-06-05 16:45:08,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:45:08,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:08,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:45:08,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:45:08,462 INFO L87 Difference]: Start difference. First operand 224 states and 532 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-06-05 16:45:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:08,579 INFO L93 Difference]: Finished difference Result 342 states and 809 transitions. [2021-06-05 16:45:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:08,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 25 [2021-06-05 16:45:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:08,581 INFO L225 Difference]: With dead ends: 342 [2021-06-05 16:45:08,600 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 16:45:08,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:08,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 16:45:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 213. [2021-06-05 16:45:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.4245283018867925) internal successors, (514), 212 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-06-05 16:45:08,608 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-06-05 16:45:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:08,608 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-06-05 16:45:08,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-06-05 16:45:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-06-05 16:45:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:08,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:08,609 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:08,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 16:45:08,829 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:08,829 INFO L82 PathProgramCache]: Analyzing trace with hash 785545354, now seen corresponding path program 1 times [2021-06-05 16:45:08,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:08,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104251705] [2021-06-05 16:45:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:08,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:08,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104251705] [2021-06-05 16:45:08,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104251705] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:08,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:08,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:45:08,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658375477] [2021-06-05 16:45:08,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:45:08,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:08,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:45:08,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:45:08,863 INFO L87 Difference]: Start difference. First operand 213 states and 514 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:08,921 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-06-05 16:45:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:45:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:08,923 INFO L225 Difference]: With dead ends: 361 [2021-06-05 16:45:08,923 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 16:45:08,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 16:45:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-06-05 16:45:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.400943396226415) internal successors, (509), 212 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-06-05 16:45:08,930 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-06-05 16:45:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:08,930 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-06-05 16:45:08,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-06-05 16:45:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:08,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:08,932 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:08,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 16:45:08,933 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:08,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:08,933 INFO L82 PathProgramCache]: Analyzing trace with hash 727801610, now seen corresponding path program 2 times [2021-06-05 16:45:08,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:08,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766666557] [2021-06-05 16:45:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:08,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:08,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766666557] [2021-06-05 16:45:08,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766666557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:08,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724560550] [2021-06-05 16:45:08,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:45:09,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:09,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:45:09,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724560550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:09,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:09,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 16:45:09,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686366107] [2021-06-05 16:45:09,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:45:09,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:09,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:45:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:45:09,100 INFO L87 Difference]: Start difference. First operand 213 states and 509 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-06-05 16:45:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:09,191 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-06-05 16:45:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:45:09,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:09,194 INFO L225 Difference]: With dead ends: 495 [2021-06-05 16:45:09,194 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 16:45:09,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 16:45:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-06-05 16:45:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4318181818181817) internal successors, (535), 220 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-06-05 16:45:09,201 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-06-05 16:45:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:09,202 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-06-05 16:45:09,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-06-05 16:45:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-06-05 16:45:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:09,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:09,203 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:09,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:09,417 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash 517104564, now seen corresponding path program 2 times [2021-06-05 16:45:09,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:09,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700260748] [2021-06-05 16:45:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:09,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700260748] [2021-06-05 16:45:09,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700260748] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:09,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:09,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:45:09,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074750732] [2021-06-05 16:45:09,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:45:09,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:09,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:45:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:45:09,443 INFO L87 Difference]: Start difference. First operand 221 states and 535 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:09,490 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-06-05 16:45:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:45:09,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:09,492 INFO L225 Difference]: With dead ends: 341 [2021-06-05 16:45:09,492 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 16:45:09,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 16:45:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-06-05 16:45:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4385245901639343) internal successors, (595), 244 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-06-05 16:45:09,500 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-06-05 16:45:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:09,500 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-06-05 16:45:09,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,500 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-06-05 16:45:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:09,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:09,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:09,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 16:45:09,501 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1245856382, now seen corresponding path program 3 times [2021-06-05 16:45:09,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:09,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980341934] [2021-06-05 16:45:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:09,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980341934] [2021-06-05 16:45:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980341934] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:09,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:09,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:45:09,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839580069] [2021-06-05 16:45:09,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:45:09,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:45:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:45:09,525 INFO L87 Difference]: Start difference. First operand 245 states and 595 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:09,580 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-06-05 16:45:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:45:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:09,583 INFO L225 Difference]: With dead ends: 284 [2021-06-05 16:45:09,583 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 16:45:09,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 16:45:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-06-05 16:45:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.422727272727273) internal successors, (533), 220 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-06-05 16:45:09,590 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-06-05 16:45:09,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:09,590 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-06-05 16:45:09,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,590 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-06-05 16:45:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:09,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:09,591 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:09,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 16:45:09,591 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:09,592 INFO L82 PathProgramCache]: Analyzing trace with hash 868885228, now seen corresponding path program 3 times [2021-06-05 16:45:09,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:09,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977244159] [2021-06-05 16:45:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:09,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977244159] [2021-06-05 16:45:09,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977244159] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:09,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:09,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:45:09,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808319190] [2021-06-05 16:45:09,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:45:09,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:45:09,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:45:09,619 INFO L87 Difference]: Start difference. First operand 221 states and 533 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:09,681 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-06-05 16:45:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:09,683 INFO L225 Difference]: With dead ends: 394 [2021-06-05 16:45:09,683 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 16:45:09,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:45:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 16:45:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-06-05 16:45:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4136363636363636) internal successors, (531), 220 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-06-05 16:45:09,690 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-06-05 16:45:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:09,690 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-06-05 16:45:09,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-06-05 16:45:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:09,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:09,691 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:09,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 16:45:09,692 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:09,692 INFO L82 PathProgramCache]: Analyzing trace with hash -241548014, now seen corresponding path program 4 times [2021-06-05 16:45:09,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:09,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297502647] [2021-06-05 16:45:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:09,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297502647] [2021-06-05 16:45:09,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297502647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:09,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105253873] [2021-06-05 16:45:09,719 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 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 [2021-06-05 16:45:09,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:09,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:45:09,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105253873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:09,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:09,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 16:45:09,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103887633] [2021-06-05 16:45:09,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:45:09,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:45:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:45:09,826 INFO L87 Difference]: Start difference. First operand 221 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-06-05 16:45:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:09,899 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-06-05 16:45:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:09,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 25 [2021-06-05 16:45:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:09,901 INFO L225 Difference]: With dead ends: 340 [2021-06-05 16:45:09,901 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 16:45:09,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 16:45:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-06-05 16:45:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4278846153846154) internal successors, (505), 208 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-06-05 16:45:09,908 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-06-05 16:45:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:09,909 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-06-05 16:45:09,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-06-05 16:45:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-06-05 16:45:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:09,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:09,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:10,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 16:45:10,134 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1742404094, now seen corresponding path program 4 times [2021-06-05 16:45:10,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:10,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761654870] [2021-06-05 16:45:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:10,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:10,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761654870] [2021-06-05 16:45:10,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761654870] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:10,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:10,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:45:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779668753] [2021-06-05 16:45:10,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:45:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:45:10,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:45:10,168 INFO L87 Difference]: Start difference. First operand 209 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:10,219 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-06-05 16:45:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:45:10,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:10,221 INFO L225 Difference]: With dead ends: 348 [2021-06-05 16:45:10,221 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 16:45:10,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 16:45:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-06-05 16:45:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-06-05 16:45:10,228 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-06-05 16:45:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:10,228 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-06-05 16:45:10,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-06-05 16:45:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:10,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:10,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:10,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 16:45:10,229 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash 2089386992, now seen corresponding path program 5 times [2021-06-05 16:45:10,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:10,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588461188] [2021-06-05 16:45:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:10,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588461188] [2021-06-05 16:45:10,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588461188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:10,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229071923] [2021-06-05 16:45:10,257 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 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 [2021-06-05 16:45:10,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:10,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:10,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:45:10,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:10,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229071923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:10,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:10,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 16:45:10,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557909569] [2021-06-05 16:45:10,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:45:10,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:45:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:45:10,389 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-06-05 16:45:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:10,470 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-06-05 16:45:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:45:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:10,472 INFO L225 Difference]: With dead ends: 379 [2021-06-05 16:45:10,472 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 16:45:10,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 16:45:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-06-05 16:45:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-06-05 16:45:10,480 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-06-05 16:45:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:10,480 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-06-05 16:45:10,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-06-05 16:45:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-06-05 16:45:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:10,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:10,481 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:10,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:10,704 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:10,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1878689946, now seen corresponding path program 5 times [2021-06-05 16:45:10,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:10,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828237274] [2021-06-05 16:45:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:10,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:10,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828237274] [2021-06-05 16:45:10,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828237274] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:10,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:10,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:45:10,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913187258] [2021-06-05 16:45:10,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:45:10,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:45:10,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:45:10,740 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:10,811 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-06-05 16:45:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:10,814 INFO L225 Difference]: With dead ends: 381 [2021-06-05 16:45:10,814 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 16:45:10,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:45:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 16:45:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-06-05 16:45:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.418103448275862) internal successors, (561), 232 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-06-05 16:45:10,822 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-06-05 16:45:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:10,822 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-06-05 16:45:10,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-06-05 16:45:10,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:10,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:10,823 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:10,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 16:45:10,823 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1687525532, now seen corresponding path program 6 times [2021-06-05 16:45:10,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:10,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130244127] [2021-06-05 16:45:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:10,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:10,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130244127] [2021-06-05 16:45:10,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130244127] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:10,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:10,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:45:10,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729912109] [2021-06-05 16:45:10,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:45:10,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:10,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:45:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:45:10,849 INFO L87 Difference]: Start difference. First operand 233 states and 561 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:10,911 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-06-05 16:45:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:45:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:10,913 INFO L225 Difference]: With dead ends: 311 [2021-06-05 16:45:10,913 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 16:45:10,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:45:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 16:45:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-06-05 16:45:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3990384615384617) internal successors, (499), 208 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-06-05 16:45:10,920 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-06-05 16:45:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:10,920 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-06-05 16:45:10,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,921 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-06-05 16:45:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 16:45:10,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:10,921 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:10,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 16:45:10,922 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2064496686, now seen corresponding path program 6 times [2021-06-05 16:45:10,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:10,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731239720] [2021-06-05 16:45:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:10,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:10,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731239720] [2021-06-05 16:45:10,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731239720] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:45:10,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:45:10,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 16:45:10,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93134242] [2021-06-05 16:45:10,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:45:10,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:10,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:45:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:45:10,950 INFO L87 Difference]: Start difference. First operand 209 states and 499 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:11,000 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-06-05 16:45:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:45:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 16:45:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:11,001 INFO L225 Difference]: With dead ends: 256 [2021-06-05 16:45:11,001 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 16:45:11,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:45:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 16:45:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-06-05 16:45:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3883495145631066) internal successors, (492), 206 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-06-05 16:45:11,007 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-06-05 16:45:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:11,007 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-06-05 16:45:11,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-06-05 16:45:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:11,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:11,008 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:11,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 16:45:11,009 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2038135170, now seen corresponding path program 1 times [2021-06-05 16:45:11,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:11,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171818235] [2021-06-05 16:45:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:11,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:11,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171818235] [2021-06-05 16:45:11,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171818235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:11,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329964035] [2021-06-05 16:45:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 16:45:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:11,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:11,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329964035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:11,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:11,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 16:45:11,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205793924] [2021-06-05 16:45:11,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:11,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:11,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:11,279 INFO L87 Difference]: Start difference. First operand 207 states and 492 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:11,367 INFO L93 Difference]: Finished difference Result 387 states and 917 transitions. [2021-06-05 16:45:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:11,369 INFO L225 Difference]: With dead ends: 387 [2021-06-05 16:45:11,370 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 16:45:11,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 16:45:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 246. [2021-06-05 16:45:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3510204081632655) internal successors, (576), 245 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 576 transitions. [2021-06-05 16:45:11,376 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 576 transitions. Word has length 28 [2021-06-05 16:45:11,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:11,376 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 576 transitions. [2021-06-05 16:45:11,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 576 transitions. [2021-06-05 16:45:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:11,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:11,377 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:11,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:11,597 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:11,597 INFO L82 PathProgramCache]: Analyzing trace with hash -957499002, now seen corresponding path program 2 times [2021-06-05 16:45:11,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:11,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756582211] [2021-06-05 16:45:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:11,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:11,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756582211] [2021-06-05 16:45:11,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756582211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138560524] [2021-06-05 16:45:11,698 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 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 [2021-06-05 16:45:11,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:11,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:11,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138560524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:11,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:11,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 16:45:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089016753] [2021-06-05 16:45:11,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:11,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:11,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:11,825 INFO L87 Difference]: Start difference. First operand 246 states and 576 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:11,929 INFO L93 Difference]: Finished difference Result 496 states and 1252 transitions. [2021-06-05 16:45:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:11,931 INFO L225 Difference]: With dead ends: 496 [2021-06-05 16:45:11,931 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 16:45:11,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:45:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 16:45:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 337. [2021-06-05 16:45:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.4791666666666665) internal successors, (833), 336 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 833 transitions. [2021-06-05 16:45:11,940 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 833 transitions. Word has length 28 [2021-06-05 16:45:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:11,940 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 833 transitions. [2021-06-05 16:45:11,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 833 transitions. [2021-06-05 16:45:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:11,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:11,941 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:12,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:12,156 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash -361393086, now seen corresponding path program 3 times [2021-06-05 16:45:12,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:12,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511117697] [2021-06-05 16:45:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:12,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:12,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511117697] [2021-06-05 16:45:12,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511117697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:12,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624490747] [2021-06-05 16:45:12,249 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 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 [2021-06-05 16:45:12,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:45:12,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:12,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:12,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:12,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624490747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:12,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:12,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 16:45:12,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306877782] [2021-06-05 16:45:12,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:12,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:12,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:12,389 INFO L87 Difference]: Start difference. First operand 337 states and 833 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:12,509 INFO L93 Difference]: Finished difference Result 504 states and 1265 transitions. [2021-06-05 16:45:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:12,511 INFO L225 Difference]: With dead ends: 504 [2021-06-05 16:45:12,511 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 16:45:12,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:45:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 16:45:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 331. [2021-06-05 16:45:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.4727272727272727) internal successors, (816), 330 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 816 transitions. [2021-06-05 16:45:12,520 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 816 transitions. Word has length 28 [2021-06-05 16:45:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:12,520 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 816 transitions. [2021-06-05 16:45:12,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 816 transitions. [2021-06-05 16:45:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:12,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:12,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:12,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:12,745 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:12,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1418916614, now seen corresponding path program 4 times [2021-06-05 16:45:12,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:12,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222339939] [2021-06-05 16:45:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:12,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:12,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222339939] [2021-06-05 16:45:12,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222339939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:12,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961563152] [2021-06-05 16:45:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:45:12,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:12,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:12,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:12,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961563152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:12,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:12,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 16:45:12,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017562857] [2021-06-05 16:45:12,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:45:12,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:45:12,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:12,975 INFO L87 Difference]: Start difference. First operand 331 states and 816 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-06-05 16:45:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:13,068 INFO L93 Difference]: Finished difference Result 519 states and 1295 transitions. [2021-06-05 16:45:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:45:13,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:13,071 INFO L225 Difference]: With dead ends: 519 [2021-06-05 16:45:13,071 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 16:45:13,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 16:45:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 349. [2021-06-05 16:45:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4913793103448274) internal successors, (867), 348 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-06-05 16:45:13,080 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-06-05 16:45:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:13,080 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-06-05 16:45:13,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-06-05 16:45:13,080 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-06-05 16:45:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:13,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:13,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:13,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 16:45:13,303 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1124070530, now seen corresponding path program 5 times [2021-06-05 16:45:13,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:13,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022494200] [2021-06-05 16:45:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:13,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:13,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022494200] [2021-06-05 16:45:13,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022494200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:13,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658034535] [2021-06-05 16:45:13,419 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 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 [2021-06-05 16:45:13,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:13,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658034535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:13,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:13,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:45:13,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684601877] [2021-06-05 16:45:13,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:13,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:13,571 INFO L87 Difference]: Start difference. First operand 349 states and 867 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:13,682 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-06-05 16:45:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:13,684 INFO L225 Difference]: With dead ends: 530 [2021-06-05 16:45:13,684 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 16:45:13,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:45:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 16:45:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-06-05 16:45:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.5525114155251143) internal successors, (1118), 438 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-06-05 16:45:13,694 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-06-05 16:45:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:13,694 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-06-05 16:45:13,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-06-05 16:45:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:13,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:13,696 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:13,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:13,909 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 152433534, now seen corresponding path program 6 times [2021-06-05 16:45:13,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:13,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460136265] [2021-06-05 16:45:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:13,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:13,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460136265] [2021-06-05 16:45:13,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460136265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:13,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367757876] [2021-06-05 16:45:13,987 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 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 [2021-06-05 16:45:14,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:14,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:14,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367757876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:14,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:14,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 16:45:14,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105583817] [2021-06-05 16:45:14,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:14,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:14,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:14,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:14,103 INFO L87 Difference]: Start difference. First operand 439 states and 1118 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-06-05 16:45:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:14,186 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-06-05 16:45:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:14,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:14,189 INFO L225 Difference]: With dead ends: 526 [2021-06-05 16:45:14,189 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 16:45:14,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:14,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 16:45:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-06-05 16:45:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.5490654205607477) internal successors, (1091), 428 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-06-05 16:45:14,199 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-06-05 16:45:14,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:14,199 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-06-05 16:45:14,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-06-05 16:45:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-06-05 16:45:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:14,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:14,200 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:14,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:14,422 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1703038790, now seen corresponding path program 7 times [2021-06-05 16:45:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:14,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347948791] [2021-06-05 16:45:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:14,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:14,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347948791] [2021-06-05 16:45:14,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347948791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:14,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260459474] [2021-06-05 16:45:14,548 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 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 [2021-06-05 16:45:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:14,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:14,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260459474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:14,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:14,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:45:14,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53460795] [2021-06-05 16:45:14,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:14,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:14,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:14,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:14,695 INFO L87 Difference]: Start difference. First operand 429 states and 1091 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-06-05 16:45:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:14,806 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-06-05 16:45:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:14,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 28 [2021-06-05 16:45:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:14,809 INFO L225 Difference]: With dead ends: 623 [2021-06-05 16:45:14,809 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 16:45:14,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:45:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 16:45:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-06-05 16:45:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.598326359832636) internal successors, (1242), 478 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-06-05 16:45:14,825 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-06-05 16:45:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:14,825 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-06-05 16:45:14,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-06-05 16:45:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-06-05 16:45:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:14,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:14,829 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:15,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 16:45:15,049 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash -908403066, now seen corresponding path program 8 times [2021-06-05 16:45:15,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:15,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259707594] [2021-06-05 16:45:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:15,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:15,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259707594] [2021-06-05 16:45:15,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259707594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:15,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861718619] [2021-06-05 16:45:15,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:45:15,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:15,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:15,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:15,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861718619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:15,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:15,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 16:45:15,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561539972] [2021-06-05 16:45:15,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:15,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:15,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:15,279 INFO L87 Difference]: Start difference. First operand 479 states and 1242 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:15,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:15,361 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-06-05 16:45:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:15,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:15,368 INFO L225 Difference]: With dead ends: 774 [2021-06-05 16:45:15,368 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 16:45:15,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 16:45:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-06-05 16:45:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.595918367346939) internal successors, (1272), 490 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-06-05 16:45:15,382 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-06-05 16:45:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:15,382 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-06-05 16:45:15,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:15,382 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-06-05 16:45:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:15,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:15,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:15,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 16:45:15,597 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1688905474, now seen corresponding path program 9 times [2021-06-05 16:45:15,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:15,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880230581] [2021-06-05 16:45:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:15,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880230581] [2021-06-05 16:45:15,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880230581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:15,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195768294] [2021-06-05 16:45:15,715 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 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 [2021-06-05 16:45:15,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:45:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:15,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:15,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195768294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:15,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:15,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 16:45:15,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379616017] [2021-06-05 16:45:15,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:45:15,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:15,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:45:15,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:15,838 INFO L87 Difference]: Start difference. First operand 491 states and 1272 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:15,936 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-06-05 16:45:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:45:15,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:15,940 INFO L225 Difference]: With dead ends: 766 [2021-06-05 16:45:15,940 INFO L226 Difference]: Without dead ends: 729 [2021-06-05 16:45:15,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-05 16:45:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-06-05 16:45:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.604330708661417) internal successors, (1323), 508 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-06-05 16:45:15,951 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-06-05 16:45:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:15,951 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-06-05 16:45:15,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-06-05 16:45:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:15,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:15,953 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:16,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:45:16,175 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:16,176 INFO L82 PathProgramCache]: Analyzing trace with hash 705112774, now seen corresponding path program 10 times [2021-06-05 16:45:16,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:16,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780536236] [2021-06-05 16:45:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:16,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780536236] [2021-06-05 16:45:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780536236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132196820] [2021-06-05 16:45:16,287 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 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 [2021-06-05 16:45:16,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:16,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:16,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132196820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:16,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:16,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 16:45:16,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39223298] [2021-06-05 16:45:16,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:16,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:16,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:16,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:16,414 INFO L87 Difference]: Start difference. First operand 509 states and 1323 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:16,580 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-06-05 16:45:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:16,584 INFO L225 Difference]: With dead ends: 860 [2021-06-05 16:45:16,584 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 16:45:16,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:45:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 16:45:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-06-05 16:45:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.645051194539249) internal successors, (1550), 586 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-06-05 16:45:16,596 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-06-05 16:45:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:16,596 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-06-05 16:45:16,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-06-05 16:45:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:16,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:16,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:16,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:16,813 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash 586029762, now seen corresponding path program 11 times [2021-06-05 16:45:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:16,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079726434] [2021-06-05 16:45:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:16,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:16,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079726434] [2021-06-05 16:45:16,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079726434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:16,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80914421] [2021-06-05 16:45:16,905 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 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 [2021-06-05 16:45:16,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:16,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:16,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:17,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80914421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:17,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:17,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 16:45:17,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293808196] [2021-06-05 16:45:17,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:17,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:17,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:17,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:17,013 INFO L87 Difference]: Start difference. First operand 587 states and 1550 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:17,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:17,126 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-06-05 16:45:17,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:17,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:17,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:17,130 INFO L225 Difference]: With dead ends: 864 [2021-06-05 16:45:17,130 INFO L226 Difference]: Without dead ends: 822 [2021-06-05 16:45:17,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:45:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-05 16:45:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-06-05 16:45:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.645614035087719) internal successors, (1508), 570 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-06-05 16:45:17,143 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-06-05 16:45:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:17,144 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-06-05 16:45:17,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-06-05 16:45:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:17,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:17,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:17,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 16:45:17,369 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash -645966640, now seen corresponding path program 12 times [2021-06-05 16:45:17,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:17,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705015313] [2021-06-05 16:45:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:17,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:17,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705015313] [2021-06-05 16:45:17,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705015313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:17,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774433686] [2021-06-05 16:45:17,464 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 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 [2021-06-05 16:45:17,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:45:17,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:17,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:17,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774433686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:17,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:17,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:45:17,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320561767] [2021-06-05 16:45:17,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:45:17,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:45:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:45:17,602 INFO L87 Difference]: Start difference. First operand 571 states and 1508 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:17,710 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-06-05 16:45:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:17,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:17,713 INFO L225 Difference]: With dead ends: 752 [2021-06-05 16:45:17,713 INFO L226 Difference]: Without dead ends: 715 [2021-06-05 16:45:17,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:45:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-05 16:45:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-06-05 16:45:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.6415770609319) internal successors, (1474), 558 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-06-05 16:45:17,724 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-06-05 16:45:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:17,724 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-06-05 16:45:17,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-06-05 16:45:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:17,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:17,726 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:17,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:17,949 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:17,950 INFO L82 PathProgramCache]: Analyzing trace with hash 638629600, now seen corresponding path program 13 times [2021-06-05 16:45:17,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:17,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831032554] [2021-06-05 16:45:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:18,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:18,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831032554] [2021-06-05 16:45:18,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831032554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:18,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811756491] [2021-06-05 16:45:18,033 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 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 [2021-06-05 16:45:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:18,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:18,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:18,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811756491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:18,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:18,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 16:45:18,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774147783] [2021-06-05 16:45:18,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:18,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:18,166 INFO L87 Difference]: Start difference. First operand 559 states and 1474 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-06-05 16:45:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:18,250 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-06-05 16:45:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:18,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:18,253 INFO L225 Difference]: With dead ends: 718 [2021-06-05 16:45:18,253 INFO L226 Difference]: Without dead ends: 681 [2021-06-05 16:45:18,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-05 16:45:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-06-05 16:45:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.676751592356688) internal successors, (1681), 628 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-06-05 16:45:18,265 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-06-05 16:45:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:18,265 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-06-05 16:45:18,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-06-05 16:45:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-06-05 16:45:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:18,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:18,267 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:18,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 16:45:18,481 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:18,481 INFO L82 PathProgramCache]: Analyzing trace with hash 519546588, now seen corresponding path program 14 times [2021-06-05 16:45:18,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:18,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491437424] [2021-06-05 16:45:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:45:18,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:18,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491437424] [2021-06-05 16:45:18,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491437424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:18,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000454275] [2021-06-05 16:45:18,575 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 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 [2021-06-05 16:45:18,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:18,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:18,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:45:18,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:18,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000454275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:18,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:18,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-05 16:45:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922623954] [2021-06-05 16:45:18,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:18,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:18,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:18,685 INFO L87 Difference]: Start difference. First operand 629 states and 1681 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-06-05 16:45:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:18,767 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-06-05 16:45:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:18,770 INFO L225 Difference]: With dead ends: 722 [2021-06-05 16:45:18,770 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 16:45:18,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 16:45:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-06-05 16:45:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.645104895104895) internal successors, (1513), 572 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-06-05 16:45:18,783 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-06-05 16:45:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:18,783 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-06-05 16:45:18,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-06-05 16:45:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-06-05 16:45:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:45:18,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:18,784 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:19,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 16:45:19,001 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:19,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:19,001 INFO L82 PathProgramCache]: Analyzing trace with hash 663834170, now seen corresponding path program 15 times [2021-06-05 16:45:19,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:19,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194149692] [2021-06-05 16:45:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:19,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194149692] [2021-06-05 16:45:19,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194149692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:19,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308882378] [2021-06-05 16:45:19,104 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 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 [2021-06-05 16:45:19,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:19,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:45:19,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:19,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308882378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:19,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:19,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:45:19,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137091487] [2021-06-05 16:45:19,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:45:19,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:19,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:45:19,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:45:19,277 INFO L87 Difference]: Start difference. First operand 573 states and 1513 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:19,462 INFO L93 Difference]: Finished difference Result 800 states and 2048 transitions. [2021-06-05 16:45:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:45:19,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:45:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:19,465 INFO L225 Difference]: With dead ends: 800 [2021-06-05 16:45:19,465 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 16:45:19,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 16:45:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 543. [2021-06-05 16:45:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.6457564575645756) internal successors, (1434), 542 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-06-05 16:45:19,477 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-06-05 16:45:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:19,477 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-06-05 16:45:19,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-06-05 16:45:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:19,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:19,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:19,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:19,693 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:19,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1075166198, now seen corresponding path program 16 times [2021-06-05 16:45:19,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:19,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504030375] [2021-06-05 16:45:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:19,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:19,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504030375] [2021-06-05 16:45:19,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504030375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:19,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945612961] [2021-06-05 16:45:19,722 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 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 [2021-06-05 16:45:19,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:19,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:19,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:19,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:19,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945612961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:19,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:19,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:45:19,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340756647] [2021-06-05 16:45:19,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:45:19,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:19,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:45:19,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:45:19,839 INFO L87 Difference]: Start difference. First operand 543 states and 1434 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 16:45:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:19,946 INFO L93 Difference]: Finished difference Result 992 states and 2597 transitions. [2021-06-05 16:45:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-06-05 16:45:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:19,950 INFO L225 Difference]: With dead ends: 992 [2021-06-05 16:45:19,950 INFO L226 Difference]: Without dead ends: 992 [2021-06-05 16:45:19,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:45:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-05 16:45:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 587. [2021-06-05 16:45:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.66382252559727) internal successors, (1561), 586 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1561 transitions. [2021-06-05 16:45:19,963 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1561 transitions. Word has length 31 [2021-06-05 16:45:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:19,964 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1561 transitions. [2021-06-05 16:45:19,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 16:45:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1561 transitions. [2021-06-05 16:45:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:19,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:19,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:20,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 16:45:20,185 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1496697428, now seen corresponding path program 17 times [2021-06-05 16:45:20,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:20,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060235400] [2021-06-05 16:45:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:20,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:20,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060235400] [2021-06-05 16:45:20,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060235400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:20,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169977919] [2021-06-05 16:45:20,215 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 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 [2021-06-05 16:45:20,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:20,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:20,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169977919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:20,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:20,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:45:20,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783114876] [2021-06-05 16:45:20,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:45:20,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:45:20,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:45:20,315 INFO L87 Difference]: Start difference. First operand 587 states and 1561 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 16:45:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:20,394 INFO L93 Difference]: Finished difference Result 1042 states and 2731 transitions. [2021-06-05 16:45:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-06-05 16:45:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:20,398 INFO L225 Difference]: With dead ends: 1042 [2021-06-05 16:45:20,398 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 16:45:20,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:45:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 16:45:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 587. [2021-06-05 16:45:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.651877133105802) internal successors, (1554), 586 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1554 transitions. [2021-06-05 16:45:20,411 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1554 transitions. Word has length 31 [2021-06-05 16:45:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:20,411 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1554 transitions. [2021-06-05 16:45:20,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 16:45:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1554 transitions. [2021-06-05 16:45:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:20,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:20,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:20,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 16:45:20,635 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash 73958184, now seen corresponding path program 18 times [2021-06-05 16:45:20,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:20,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279818285] [2021-06-05 16:45:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:20,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279818285] [2021-06-05 16:45:20,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279818285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899702671] [2021-06-05 16:45:20,664 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 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 [2021-06-05 16:45:20,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:20,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:20,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899702671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:20,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:20,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466755636] [2021-06-05 16:45:20,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:20,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:20,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:20,782 INFO L87 Difference]: Start difference. First operand 587 states and 1554 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:21,055 INFO L93 Difference]: Finished difference Result 2039 states and 5214 transitions. [2021-06-05 16:45:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:45:21,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:21,060 INFO L225 Difference]: With dead ends: 2039 [2021-06-05 16:45:21,060 INFO L226 Difference]: Without dead ends: 2039 [2021-06-05 16:45:21,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:45:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-06-05 16:45:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 884. [2021-06-05 16:45:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.7633069082672708) internal successors, (2440), 883 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2440 transitions. [2021-06-05 16:45:21,085 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2440 transitions. Word has length 31 [2021-06-05 16:45:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:21,085 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2440 transitions. [2021-06-05 16:45:21,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2440 transitions. [2021-06-05 16:45:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:21,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:21,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:21,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:21,301 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:21,301 INFO L82 PathProgramCache]: Analyzing trace with hash -136738862, now seen corresponding path program 19 times [2021-06-05 16:45:21,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:21,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730550116] [2021-06-05 16:45:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:21,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:21,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730550116] [2021-06-05 16:45:21,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730550116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:21,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164016342] [2021-06-05 16:45:21,329 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 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 [2021-06-05 16:45:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:21,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164016342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:21,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:21,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:21,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697730302] [2021-06-05 16:45:21,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:21,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:21,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:21,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:21,431 INFO L87 Difference]: Start difference. First operand 884 states and 2440 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:21,609 INFO L93 Difference]: Finished difference Result 1980 states and 5236 transitions. [2021-06-05 16:45:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:45:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:21,613 INFO L225 Difference]: With dead ends: 1980 [2021-06-05 16:45:21,613 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 16:45:21,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:45:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 16:45:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1100. [2021-06-05 16:45:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.808007279344859) internal successors, (3086), 1099 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3086 transitions. [2021-06-05 16:45:21,639 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3086 transitions. Word has length 31 [2021-06-05 16:45:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:21,639 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 3086 transitions. [2021-06-05 16:45:21,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3086 transitions. [2021-06-05 16:45:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:21,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:21,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:21,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 16:45:21,857 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash 592012956, now seen corresponding path program 20 times [2021-06-05 16:45:21,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:21,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716514302] [2021-06-05 16:45:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:21,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:21,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716514302] [2021-06-05 16:45:21,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716514302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:21,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890084978] [2021-06-05 16:45:21,882 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 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 [2021-06-05 16:45:21,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:21,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:21,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890084978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:21,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:21,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:21,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848830777] [2021-06-05 16:45:21,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:21,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:21,992 INFO L87 Difference]: Start difference. First operand 1100 states and 3086 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:22,261 INFO L93 Difference]: Finished difference Result 2053 states and 5419 transitions. [2021-06-05 16:45:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:45:22,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:22,265 INFO L225 Difference]: With dead ends: 2053 [2021-06-05 16:45:22,265 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 16:45:22,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:45:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 16:45:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1104. [2021-06-05 16:45:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 2.8068902991840434) internal successors, (3096), 1103 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3096 transitions. [2021-06-05 16:45:22,293 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3096 transitions. Word has length 31 [2021-06-05 16:45:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:22,294 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 3096 transitions. [2021-06-05 16:45:22,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3096 transitions. [2021-06-05 16:45:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:22,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:22,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:22,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:22,513 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash 215041802, now seen corresponding path program 21 times [2021-06-05 16:45:22,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:22,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527266062] [2021-06-05 16:45:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:22,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527266062] [2021-06-05 16:45:22,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527266062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:22,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121824049] [2021-06-05 16:45:22,538 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 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 [2021-06-05 16:45:22,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:45:22,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:22,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:22,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:22,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121824049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:22,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:22,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:22,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515339512] [2021-06-05 16:45:22,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:22,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:22,639 INFO L87 Difference]: Start difference. First operand 1104 states and 3096 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:22,847 INFO L93 Difference]: Finished difference Result 2247 states and 5856 transitions. [2021-06-05 16:45:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:45:22,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:22,851 INFO L225 Difference]: With dead ends: 2247 [2021-06-05 16:45:22,851 INFO L226 Difference]: Without dead ends: 2233 [2021-06-05 16:45:22,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:45:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-06-05 16:45:22,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1111. [2021-06-05 16:45:22,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 2.791891891891892) internal successors, (3099), 1110 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3099 transitions. [2021-06-05 16:45:22,886 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3099 transitions. Word has length 31 [2021-06-05 16:45:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:22,886 INFO L482 AbstractCegarLoop]: Abstraction has 1111 states and 3099 transitions. [2021-06-05 16:45:22,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3099 transitions. [2021-06-05 16:45:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:22,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:22,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:23,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 16:45:23,105 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash 299440576, now seen corresponding path program 22 times [2021-06-05 16:45:23,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:23,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317549986] [2021-06-05 16:45:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:23,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:23,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317549986] [2021-06-05 16:45:23,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317549986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:23,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818502781] [2021-06-05 16:45:23,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:45:23,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:23,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818502781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:23,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:23,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:23,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104471172] [2021-06-05 16:45:23,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:23,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:23,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:23,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:23,237 INFO L87 Difference]: Start difference. First operand 1111 states and 3099 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:23,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:23,369 INFO L93 Difference]: Finished difference Result 1836 states and 4940 transitions. [2021-06-05 16:45:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:45:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:23,372 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 16:45:23,373 INFO L226 Difference]: Without dead ends: 1808 [2021-06-05 16:45:23,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-06-05 16:45:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1121. [2021-06-05 16:45:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.775) internal successors, (3108), 1120 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3108 transitions. [2021-06-05 16:45:23,396 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3108 transitions. Word has length 31 [2021-06-05 16:45:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:23,396 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3108 transitions. [2021-06-05 16:45:23,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3108 transitions. [2021-06-05 16:45:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:23,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:23,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:23,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 16:45:23,601 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2072647434, now seen corresponding path program 23 times [2021-06-05 16:45:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:23,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730066240] [2021-06-05 16:45:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:23,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730066240] [2021-06-05 16:45:23,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730066240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318550631] [2021-06-05 16:45:23,629 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 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 [2021-06-05 16:45:23,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:45:23,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:23,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:23,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318550631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:23,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:23,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:45:23,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156463009] [2021-06-05 16:45:23,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:23,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:23,755 INFO L87 Difference]: Start difference. First operand 1121 states and 3108 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:23,982 INFO L93 Difference]: Finished difference Result 2462 states and 6556 transitions. [2021-06-05 16:45:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:23,987 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 16:45:23,987 INFO L226 Difference]: Without dead ends: 2408 [2021-06-05 16:45:23,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:45:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-06-05 16:45:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1441. [2021-06-05 16:45:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 2.8208333333333333) internal successors, (4062), 1440 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4062 transitions. [2021-06-05 16:45:24,034 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4062 transitions. Word has length 31 [2021-06-05 16:45:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:24,034 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 4062 transitions. [2021-06-05 16:45:24,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4062 transitions. [2021-06-05 16:45:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:24,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:24,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:24,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 16:45:24,253 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1805660222, now seen corresponding path program 24 times [2021-06-05 16:45:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:24,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896500282] [2021-06-05 16:45:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:24,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:24,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896500282] [2021-06-05 16:45:24,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896500282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:24,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842187536] [2021-06-05 16:45:24,283 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 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 [2021-06-05 16:45:24,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:45:24,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:24,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:24,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842187536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:24,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:24,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 16:45:24,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185239620] [2021-06-05 16:45:24,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:24,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:24,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:24,395 INFO L87 Difference]: Start difference. First operand 1441 states and 4062 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-05 16:45:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:24,616 INFO L93 Difference]: Finished difference Result 2786 states and 7510 transitions. [2021-06-05 16:45:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:24,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 31 [2021-06-05 16:45:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:24,621 INFO L225 Difference]: With dead ends: 2786 [2021-06-05 16:45:24,621 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 16:45:24,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:45:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 16:45:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1845. [2021-06-05 16:45:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 2.828633405639913) internal successors, (5216), 1844 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 5216 transitions. [2021-06-05 16:45:24,663 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 5216 transitions. Word has length 31 [2021-06-05 16:45:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:24,663 INFO L482 AbstractCegarLoop]: Abstraction has 1845 states and 5216 transitions. [2021-06-05 16:45:24,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-05 16:45:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 5216 transitions. [2021-06-05 16:45:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:24,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:24,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:24,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:24,885 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1164137342, now seen corresponding path program 25 times [2021-06-05 16:45:24,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:24,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394382640] [2021-06-05 16:45:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:24,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394382640] [2021-06-05 16:45:24,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394382640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026104315] [2021-06-05 16:45:24,914 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 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 [2021-06-05 16:45:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:24,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:25,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026104315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:25,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:25,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:45:25,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659461004] [2021-06-05 16:45:25,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:45:25,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:25,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:45:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:45:25,017 INFO L87 Difference]: Start difference. First operand 1845 states and 5216 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 16:45:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:25,109 INFO L93 Difference]: Finished difference Result 2330 states and 6455 transitions. [2021-06-05 16:45:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-06-05 16:45:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:25,114 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 16:45:25,114 INFO L226 Difference]: Without dead ends: 2330 [2021-06-05 16:45:25,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:45:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-05 16:45:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1887. [2021-06-05 16:45:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.829798515376458) internal successors, (5337), 1886 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5337 transitions. [2021-06-05 16:45:25,151 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5337 transitions. Word has length 31 [2021-06-05 16:45:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:25,151 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 5337 transitions. [2021-06-05 16:45:25,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 16:45:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5337 transitions. [2021-06-05 16:45:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:25,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:25,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:25,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 16:45:25,369 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1736902034, now seen corresponding path program 26 times [2021-06-05 16:45:25,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:25,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640061483] [2021-06-05 16:45:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:25,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:25,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640061483] [2021-06-05 16:45:25,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640061483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:25,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291326097] [2021-06-05 16:45:25,394 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 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 [2021-06-05 16:45:25,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:25,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:25,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291326097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:25,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:25,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:45:25,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56395604] [2021-06-05 16:45:25,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:45:25,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:45:25,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:45:25,507 INFO L87 Difference]: Start difference. First operand 1887 states and 5337 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 16:45:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:25,601 INFO L93 Difference]: Finished difference Result 2501 states and 6932 transitions. [2021-06-05 16:45:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:45:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 31 [2021-06-05 16:45:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:25,605 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 16:45:25,605 INFO L226 Difference]: Without dead ends: 2465 [2021-06-05 16:45:25,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:45:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-05 16:45:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1887. [2021-06-05 16:45:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.8266171792152703) internal successors, (5331), 1886 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5331 transitions. [2021-06-05 16:45:25,642 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5331 transitions. Word has length 31 [2021-06-05 16:45:25,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:25,642 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 5331 transitions. [2021-06-05 16:45:25,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-06-05 16:45:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5331 transitions. [2021-06-05 16:45:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:25,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:25,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:25,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:25,869 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1310615324, now seen corresponding path program 27 times [2021-06-05 16:45:25,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:25,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589986293] [2021-06-05 16:45:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:25,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589986293] [2021-06-05 16:45:25,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589986293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620788015] [2021-06-05 16:45:25,908 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 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 [2021-06-05 16:45:25,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:25,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:25,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:26,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620788015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:26,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:26,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:26,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448330012] [2021-06-05 16:45:26,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:26,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:26,009 INFO L87 Difference]: Start difference. First operand 1887 states and 5331 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:26,173 INFO L93 Difference]: Finished difference Result 2490 states and 6843 transitions. [2021-06-05 16:45:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:45:26,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:26,177 INFO L225 Difference]: With dead ends: 2490 [2021-06-05 16:45:26,177 INFO L226 Difference]: Without dead ends: 2490 [2021-06-05 16:45:26,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-06-05 16:45:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2067. [2021-06-05 16:45:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.8330106485963213) internal successors, (5853), 2066 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5853 transitions. [2021-06-05 16:45:26,216 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5853 transitions. Word has length 31 [2021-06-05 16:45:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:26,216 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 5853 transitions. [2021-06-05 16:45:26,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5853 transitions. [2021-06-05 16:45:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:26,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:26,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:26,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 16:45:26,433 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1055874042, now seen corresponding path program 28 times [2021-06-05 16:45:26,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:26,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73913097] [2021-06-05 16:45:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:26,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:26,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73913097] [2021-06-05 16:45:26,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73913097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:26,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269137757] [2021-06-05 16:45:26,466 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 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 [2021-06-05 16:45:26,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:26,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269137757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:26,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:26,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:26,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025866188] [2021-06-05 16:45:26,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:26,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:26,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:26,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:26,565 INFO L87 Difference]: Start difference. First operand 2067 states and 5853 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:26,723 INFO L93 Difference]: Finished difference Result 2862 states and 7833 transitions. [2021-06-05 16:45:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:45:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:26,727 INFO L225 Difference]: With dead ends: 2862 [2021-06-05 16:45:26,727 INFO L226 Difference]: Without dead ends: 2838 [2021-06-05 16:45:26,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-05 16:45:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2147. [2021-06-05 16:45:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 2.8355079217148185) internal successors, (6085), 2146 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6085 transitions. [2021-06-05 16:45:26,797 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6085 transitions. Word has length 31 [2021-06-05 16:45:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:26,797 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 6085 transitions. [2021-06-05 16:45:26,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6085 transitions. [2021-06-05 16:45:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:26,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:26,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:27,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 16:45:27,024 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:27,024 INFO L82 PathProgramCache]: Analyzing trace with hash -276839870, now seen corresponding path program 29 times [2021-06-05 16:45:27,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:27,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747745108] [2021-06-05 16:45:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:27,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:27,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747745108] [2021-06-05 16:45:27,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747745108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:27,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231716003] [2021-06-05 16:45:27,053 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 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 [2021-06-05 16:45:27,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:27,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:27,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:27,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:27,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231716003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:27,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:27,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:27,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128807174] [2021-06-05 16:45:27,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:27,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:27,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:27,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:27,173 INFO L87 Difference]: Start difference. First operand 2147 states and 6085 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:27,423 INFO L93 Difference]: Finished difference Result 3330 states and 8999 transitions. [2021-06-05 16:45:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:45:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:27,428 INFO L225 Difference]: With dead ends: 3330 [2021-06-05 16:45:27,428 INFO L226 Difference]: Without dead ends: 3330 [2021-06-05 16:45:27,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:45:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-06-05 16:45:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2317. [2021-06-05 16:45:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 2.8626943005181347) internal successors, (6630), 2316 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 6630 transitions. [2021-06-05 16:45:27,477 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 6630 transitions. Word has length 31 [2021-06-05 16:45:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:27,477 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 6630 transitions. [2021-06-05 16:45:27,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 6630 transitions. [2021-06-05 16:45:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:27,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:27,482 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:27,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 16:45:27,701 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:27,701 INFO L82 PathProgramCache]: Analyzing trace with hash -487536916, now seen corresponding path program 30 times [2021-06-05 16:45:27,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:27,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071205859] [2021-06-05 16:45:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:27,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071205859] [2021-06-05 16:45:27,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071205859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494301355] [2021-06-05 16:45:27,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:45:27,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:45:27,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:27,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:27,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:27,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494301355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:27,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:27,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:27,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106344089] [2021-06-05 16:45:27,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:27,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:27,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:27,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:27,832 INFO L87 Difference]: Start difference. First operand 2317 states and 6630 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:28,050 INFO L93 Difference]: Finished difference Result 3536 states and 9738 transitions. [2021-06-05 16:45:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:45:28,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:28,054 INFO L225 Difference]: With dead ends: 3536 [2021-06-05 16:45:28,054 INFO L226 Difference]: Without dead ends: 3524 [2021-06-05 16:45:28,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:45:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-06-05 16:45:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 2553. [2021-06-05 16:45:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.865203761755486) internal successors, (7312), 2552 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 7312 transitions. [2021-06-05 16:45:28,103 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 7312 transitions. Word has length 31 [2021-06-05 16:45:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:28,103 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 7312 transitions. [2021-06-05 16:45:28,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 7312 transitions. [2021-06-05 16:45:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:28,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:28,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:28,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 16:45:28,329 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:28,329 INFO L82 PathProgramCache]: Analyzing trace with hash 241214902, now seen corresponding path program 31 times [2021-06-05 16:45:28,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:28,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902658265] [2021-06-05 16:45:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:28,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:28,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902658265] [2021-06-05 16:45:28,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902658265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:28,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945339263] [2021-06-05 16:45:28,364 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 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 [2021-06-05 16:45:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:28,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:28,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945339263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:28,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:28,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:28,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459714768] [2021-06-05 16:45:28,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:28,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:28,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:28,473 INFO L87 Difference]: Start difference. First operand 2553 states and 7312 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:28,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:28,700 INFO L93 Difference]: Finished difference Result 3564 states and 9736 transitions. [2021-06-05 16:45:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:45:28,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:28,704 INFO L225 Difference]: With dead ends: 3564 [2021-06-05 16:45:28,704 INFO L226 Difference]: Without dead ends: 3564 [2021-06-05 16:45:28,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:45:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-05 16:45:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2557. [2021-06-05 16:45:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2556 states have (on average 2.856025039123631) internal successors, (7300), 2556 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 7300 transitions. [2021-06-05 16:45:28,753 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 7300 transitions. Word has length 31 [2021-06-05 16:45:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:28,754 INFO L482 AbstractCegarLoop]: Abstraction has 2557 states and 7300 transitions. [2021-06-05 16:45:28,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 7300 transitions. [2021-06-05 16:45:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:28,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:28,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:28,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:45:28,981 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:28,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:28,982 INFO L82 PathProgramCache]: Analyzing trace with hash -135756252, now seen corresponding path program 32 times [2021-06-05 16:45:28,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:28,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323411728] [2021-06-05 16:45:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:29,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:29,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323411728] [2021-06-05 16:45:29,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323411728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:29,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638888375] [2021-06-05 16:45:29,007 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 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 [2021-06-05 16:45:29,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:29,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:29,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638888375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:29,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:29,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:45:29,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553973450] [2021-06-05 16:45:29,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:29,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:29,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:29,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:29,106 INFO L87 Difference]: Start difference. First operand 2557 states and 7300 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:29,272 INFO L93 Difference]: Finished difference Result 3120 states and 8617 transitions. [2021-06-05 16:45:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:45:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 16:45:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:29,276 INFO L225 Difference]: With dead ends: 3120 [2021-06-05 16:45:29,276 INFO L226 Difference]: Without dead ends: 3106 [2021-06-05 16:45:29,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-06-05 16:45:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2571. [2021-06-05 16:45:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2570 states have (on average 2.849805447470817) internal successors, (7324), 2570 states have internal predecessors, (7324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 7324 transitions. [2021-06-05 16:45:29,306 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 7324 transitions. Word has length 31 [2021-06-05 16:45:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:29,306 INFO L482 AbstractCegarLoop]: Abstraction has 2571 states and 7324 transitions. [2021-06-05 16:45:29,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 7324 transitions. [2021-06-05 16:45:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:29,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:29,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:29,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 16:45:29,532 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2133092770, now seen corresponding path program 33 times [2021-06-05 16:45:29,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:29,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596292960] [2021-06-05 16:45:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:29,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:29,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596292960] [2021-06-05 16:45:29,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596292960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:29,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558971876] [2021-06-05 16:45:29,559 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 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 [2021-06-05 16:45:29,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:29,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:29,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:29,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558971876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:29,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:29,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:45:29,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292262246] [2021-06-05 16:45:29,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:29,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:29,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:29,669 INFO L87 Difference]: Start difference. First operand 2571 states and 7324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-06-05 16:45:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:29,891 INFO L93 Difference]: Finished difference Result 3644 states and 10056 transitions. [2021-06-05 16:45:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:45:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) Word has length 31 [2021-06-05 16:45:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:29,897 INFO L225 Difference]: With dead ends: 3644 [2021-06-05 16:45:29,897 INFO L226 Difference]: Without dead ends: 3644 [2021-06-05 16:45:29,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:45:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-05 16:45:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2693. [2021-06-05 16:45:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.846582466567608) internal successors, (7663), 2692 states have internal predecessors, (7663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7663 transitions. [2021-06-05 16:45:29,946 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7663 transitions. Word has length 31 [2021-06-05 16:45:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:29,946 INFO L482 AbstractCegarLoop]: Abstraction has 2693 states and 7663 transitions. [2021-06-05 16:45:29,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-06-05 16:45:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7663 transitions. [2021-06-05 16:45:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:29,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:29,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:30,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 16:45:30,175 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1233797400, now seen corresponding path program 34 times [2021-06-05 16:45:30,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:30,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780488346] [2021-06-05 16:45:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:30,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:30,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780488346] [2021-06-05 16:45:30,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780488346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:30,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907147653] [2021-06-05 16:45:30,204 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 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 [2021-06-05 16:45:30,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:30,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:30,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:30,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907147653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:30,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:30,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 16:45:30,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454042913] [2021-06-05 16:45:30,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:30,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:30,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:30,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:30,319 INFO L87 Difference]: Start difference. First operand 2693 states and 7663 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-06-05 16:45:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:30,522 INFO L93 Difference]: Finished difference Result 4193 states and 11519 transitions. [2021-06-05 16:45:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:30,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) Word has length 31 [2021-06-05 16:45:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:30,527 INFO L225 Difference]: With dead ends: 4193 [2021-06-05 16:45:30,527 INFO L226 Difference]: Without dead ends: 4193 [2021-06-05 16:45:30,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:45:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-05 16:45:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3161. [2021-06-05 16:45:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 2.854113924050633) internal successors, (9019), 3160 states have internal predecessors, (9019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 9019 transitions. [2021-06-05 16:45:30,575 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 9019 transitions. Word has length 31 [2021-06-05 16:45:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 9019 transitions. [2021-06-05 16:45:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-06-05 16:45:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 9019 transitions. [2021-06-05 16:45:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:30,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:30,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:30,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:30,796 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:30,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1092713782, now seen corresponding path program 35 times [2021-06-05 16:45:30,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:30,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639076050] [2021-06-05 16:45:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:45:30,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:30,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639076050] [2021-06-05 16:45:30,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639076050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:30,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496941029] [2021-06-05 16:45:30,816 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 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 [2021-06-05 16:45:30,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:45:30,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:30,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:30,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496941029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:30,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:30,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 16:45:30,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935234619] [2021-06-05 16:45:30,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:45:30,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:45:30,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:45:30,938 INFO L87 Difference]: Start difference. First operand 3161 states and 9019 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-05 16:45:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:31,138 INFO L93 Difference]: Finished difference Result 4026 states and 11093 transitions. [2021-06-05 16:45:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:45:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 31 [2021-06-05 16:45:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:31,142 INFO L225 Difference]: With dead ends: 4026 [2021-06-05 16:45:31,142 INFO L226 Difference]: Without dead ends: 4012 [2021-06-05 16:45:31,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:45:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-06-05 16:45:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3057. [2021-06-05 16:45:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3056 states have (on average 2.8406413612565444) internal successors, (8681), 3056 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 8681 transitions. [2021-06-05 16:45:31,181 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 8681 transitions. Word has length 31 [2021-06-05 16:45:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:31,181 INFO L482 AbstractCegarLoop]: Abstraction has 3057 states and 8681 transitions. [2021-06-05 16:45:31,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-05 16:45:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 8681 transitions. [2021-06-05 16:45:31,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 16:45:31,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:31,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:31,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:31,393 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:31,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1008315008, now seen corresponding path program 36 times [2021-06-05 16:45:31,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:31,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462415939] [2021-06-05 16:45:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:31,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:31,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462415939] [2021-06-05 16:45:31,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462415939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:31,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543944166] [2021-06-05 16:45:31,420 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 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 [2021-06-05 16:45:31,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:45:31,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:45:31,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:31,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543944166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:31,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:31,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 16:45:31,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138274729] [2021-06-05 16:45:31,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:45:31,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:45:31,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:45:31,510 INFO L87 Difference]: Start difference. First operand 3057 states and 8681 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 16:45:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:31,694 INFO L93 Difference]: Finished difference Result 4063 states and 11292 transitions. [2021-06-05 16:45:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:45:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 31 [2021-06-05 16:45:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:31,699 INFO L225 Difference]: With dead ends: 4063 [2021-06-05 16:45:31,699 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 16:45:31,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:45:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 16:45:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3327. [2021-06-05 16:45:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.850871918220084) internal successors, (9482), 3326 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9482 transitions. [2021-06-05 16:45:31,758 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9482 transitions. Word has length 31 [2021-06-05 16:45:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:31,758 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 9482 transitions. [2021-06-05 16:45:31,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 16:45:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9482 transitions. [2021-06-05 16:45:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:31,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:31,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:31,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:31,962 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash 225377440, now seen corresponding path program 37 times [2021-06-05 16:45:31,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:31,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436703001] [2021-06-05 16:45:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:32,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:32,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436703001] [2021-06-05 16:45:32,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436703001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:32,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207184127] [2021-06-05 16:45:32,148 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 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 [2021-06-05 16:45:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:32,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:32,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:32,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207184127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:32,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:32,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 16:45:32,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027934405] [2021-06-05 16:45:32,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:45:32,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:45:32,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:45:32,340 INFO L87 Difference]: Start difference. First operand 3327 states and 9482 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:32,474 INFO L93 Difference]: Finished difference Result 5088 states and 14550 transitions. [2021-06-05 16:45:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:32,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:32,480 INFO L225 Difference]: With dead ends: 5088 [2021-06-05 16:45:32,480 INFO L226 Difference]: Without dead ends: 5050 [2021-06-05 16:45:32,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-06-05 16:45:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 3355. [2021-06-05 16:45:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 2.8449612403100777) internal successors, (9542), 3354 states have internal predecessors, (9542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 9542 transitions. [2021-06-05 16:45:32,526 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 9542 transitions. Word has length 34 [2021-06-05 16:45:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:32,526 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 9542 transitions. [2021-06-05 16:45:32,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 9542 transitions. [2021-06-05 16:45:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:32,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:32,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:32,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 16:45:32,731 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash -236314294, now seen corresponding path program 38 times [2021-06-05 16:45:32,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:32,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949221589] [2021-06-05 16:45:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:32,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:32,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949221589] [2021-06-05 16:45:32,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949221589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:32,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036655390] [2021-06-05 16:45:32,849 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 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 [2021-06-05 16:45:32,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:32,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:32,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:33,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036655390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:33,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:33,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:45:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405146308] [2021-06-05 16:45:33,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:33,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:33,081 INFO L87 Difference]: Start difference. First operand 3355 states and 9542 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:33,333 INFO L93 Difference]: Finished difference Result 6932 states and 19936 transitions. [2021-06-05 16:45:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:45:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:33,340 INFO L225 Difference]: With dead ends: 6932 [2021-06-05 16:45:33,341 INFO L226 Difference]: Without dead ends: 6850 [2021-06-05 16:45:33,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:45:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-06-05 16:45:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 4710. [2021-06-05 16:45:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4710 states, 4709 states have (on average 2.8789551921851775) internal successors, (13557), 4709 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 13557 transitions. [2021-06-05 16:45:33,413 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 13557 transitions. Word has length 34 [2021-06-05 16:45:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:33,413 INFO L482 AbstractCegarLoop]: Abstraction has 4710 states and 13557 transitions. [2021-06-05 16:45:33,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 13557 transitions. [2021-06-05 16:45:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:33,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:33,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:33,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:33,620 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:33,621 INFO L82 PathProgramCache]: Analyzing trace with hash 359791622, now seen corresponding path program 39 times [2021-06-05 16:45:33,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:33,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177393372] [2021-06-05 16:45:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:33,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:33,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177393372] [2021-06-05 16:45:33,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177393372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:33,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369596825] [2021-06-05 16:45:33,750 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 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 [2021-06-05 16:45:33,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:33,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:33,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:33,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:33,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369596825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:33,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:33,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:45:33,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615043219] [2021-06-05 16:45:33,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:33,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:33,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:33,958 INFO L87 Difference]: Start difference. First operand 4710 states and 13557 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:34,258 INFO L93 Difference]: Finished difference Result 6936 states and 19938 transitions. [2021-06-05 16:45:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:45:34,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:34,270 INFO L225 Difference]: With dead ends: 6936 [2021-06-05 16:45:34,270 INFO L226 Difference]: Without dead ends: 6824 [2021-06-05 16:45:34,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:45:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-06-05 16:45:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 4404. [2021-06-05 16:45:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.865319100613218) internal successors, (12616), 4403 states have internal predecessors, (12616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 12616 transitions. [2021-06-05 16:45:34,338 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 12616 transitions. Word has length 34 [2021-06-05 16:45:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:34,338 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 12616 transitions. [2021-06-05 16:45:34,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 12616 transitions. [2021-06-05 16:45:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:34,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:34,344 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:34,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:45:34,545 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash -697731906, now seen corresponding path program 40 times [2021-06-05 16:45:34,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:34,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942100187] [2021-06-05 16:45:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:34,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:34,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942100187] [2021-06-05 16:45:34,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942100187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:34,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107422892] [2021-06-05 16:45:34,663 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 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 [2021-06-05 16:45:34,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:34,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:34,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:34,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:34,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107422892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:34,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:34,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:45:34,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749992977] [2021-06-05 16:45:34,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:34,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:34,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:34,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:34,875 INFO L87 Difference]: Start difference. First operand 4404 states and 12616 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:35,063 INFO L93 Difference]: Finished difference Result 6717 states and 19331 transitions. [2021-06-05 16:45:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:35,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:35,072 INFO L225 Difference]: With dead ends: 6717 [2021-06-05 16:45:35,072 INFO L226 Difference]: Without dead ends: 6641 [2021-06-05 16:45:35,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:35,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-06-05 16:45:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 4682. [2021-06-05 16:45:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4682 states, 4681 states have (on average 2.87267677846614) internal successors, (13447), 4681 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4682 states to 4682 states and 13447 transitions. [2021-06-05 16:45:35,161 INFO L78 Accepts]: Start accepts. Automaton has 4682 states and 13447 transitions. Word has length 34 [2021-06-05 16:45:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:35,161 INFO L482 AbstractCegarLoop]: Abstraction has 4682 states and 13447 transitions. [2021-06-05 16:45:35,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4682 states and 13447 transitions. [2021-06-05 16:45:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:35,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:35,166 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:35,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 16:45:35,367 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:35,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:35,367 INFO L82 PathProgramCache]: Analyzing trace with hash 480842916, now seen corresponding path program 41 times [2021-06-05 16:45:35,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:35,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486513673] [2021-06-05 16:45:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:35,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486513673] [2021-06-05 16:45:35,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486513673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063882239] [2021-06-05 16:45:35,490 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 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 [2021-06-05 16:45:35,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:35,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:35,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:35,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063882239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:35,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:35,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:45:35,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972967310] [2021-06-05 16:45:35,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:35,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:35,700 INFO L87 Difference]: Start difference. First operand 4682 states and 13447 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:35,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:35,876 INFO L93 Difference]: Finished difference Result 6651 states and 19193 transitions. [2021-06-05 16:45:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:35,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:35,885 INFO L225 Difference]: With dead ends: 6651 [2021-06-05 16:45:35,885 INFO L226 Difference]: Without dead ends: 6613 [2021-06-05 16:45:35,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2021-06-05 16:45:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 4704. [2021-06-05 16:45:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 2.8730597490963214) internal successors, (13512), 4703 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 13512 transitions. [2021-06-05 16:45:36,003 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 13512 transitions. Word has length 34 [2021-06-05 16:45:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:36,003 INFO L482 AbstractCegarLoop]: Abstraction has 4704 states and 13512 transitions. [2021-06-05 16:45:36,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 13512 transitions. [2021-06-05 16:45:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:36,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:36,010 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:36,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:36,234 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:36,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1249457240, now seen corresponding path program 42 times [2021-06-05 16:45:36,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:36,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100820737] [2021-06-05 16:45:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:36,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:36,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100820737] [2021-06-05 16:45:36,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100820737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:36,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422508183] [2021-06-05 16:45:36,369 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 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 [2021-06-05 16:45:36,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:45:36,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:36,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:45:36,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:36,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422508183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:36,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:36,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:45:36,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277847365] [2021-06-05 16:45:36,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:45:36,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:45:36,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:36,615 INFO L87 Difference]: Start difference. First operand 4704 states and 13512 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:36,992 INFO L93 Difference]: Finished difference Result 7194 states and 20574 transitions. [2021-06-05 16:45:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:45:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:37,001 INFO L225 Difference]: With dead ends: 7194 [2021-06-05 16:45:37,001 INFO L226 Difference]: Without dead ends: 7092 [2021-06-05 16:45:37,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 408.8ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:45:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2021-06-05 16:45:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 6468. [2021-06-05 16:45:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 2.9008813978660895) internal successors, (18760), 6467 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 18760 transitions. [2021-06-05 16:45:37,093 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 18760 transitions. Word has length 34 [2021-06-05 16:45:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:37,093 INFO L482 AbstractCegarLoop]: Abstraction has 6468 states and 18760 transitions. [2021-06-05 16:45:37,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 18760 transitions. [2021-06-05 16:45:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:37,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:37,104 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:37,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 16:45:37,309 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1769005992, now seen corresponding path program 43 times [2021-06-05 16:45:37,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:37,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482193978] [2021-06-05 16:45:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:37,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:37,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482193978] [2021-06-05 16:45:37,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482193978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:37,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644326188] [2021-06-05 16:45:37,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:45:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:37,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:37,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644326188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:37,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:37,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:45:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743104974] [2021-06-05 16:45:37,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:37,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:37,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:37,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:37,622 INFO L87 Difference]: Start difference. First operand 6468 states and 18760 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 16:45:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:37,846 INFO L93 Difference]: Finished difference Result 7452 states and 21366 transitions. [2021-06-05 16:45:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:37,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) Word has length 34 [2021-06-05 16:45:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:37,855 INFO L225 Difference]: With dead ends: 7452 [2021-06-05 16:45:37,855 INFO L226 Difference]: Without dead ends: 7330 [2021-06-05 16:45:37,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-05 16:45:37,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 5896. [2021-06-05 16:45:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 2.891263782866836) internal successors, (17044), 5895 states have internal predecessors, (17044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 17044 transitions. [2021-06-05 16:45:37,937 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 17044 transitions. Word has length 34 [2021-06-05 16:45:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:37,937 INFO L482 AbstractCegarLoop]: Abstraction has 5896 states and 17044 transitions. [2021-06-05 16:45:37,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 16:45:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 17044 transitions. [2021-06-05 16:45:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:37,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:37,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:38,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:38,145 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:38,145 INFO L82 PathProgramCache]: Analyzing trace with hash -218400736, now seen corresponding path program 44 times [2021-06-05 16:45:38,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:38,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145968743] [2021-06-05 16:45:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:38,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:38,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145968743] [2021-06-05 16:45:38,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145968743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:38,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208994877] [2021-06-05 16:45:38,251 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 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 [2021-06-05 16:45:38,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:38,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:38,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:38,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208994877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:38,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:38,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:45:38,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177822634] [2021-06-05 16:45:38,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:38,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:38,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:38,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:38,435 INFO L87 Difference]: Start difference. First operand 5896 states and 17044 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 16:45:38,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:38,640 INFO L93 Difference]: Finished difference Result 6556 states and 18704 transitions. [2021-06-05 16:45:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:38,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) Word has length 34 [2021-06-05 16:45:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:38,649 INFO L225 Difference]: With dead ends: 6556 [2021-06-05 16:45:38,649 INFO L226 Difference]: Without dead ends: 6480 [2021-06-05 16:45:38,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-06-05 16:45:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5562. [2021-06-05 16:45:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.88563208056105) internal successors, (16047), 5561 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16047 transitions. [2021-06-05 16:45:38,726 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16047 transitions. Word has length 34 [2021-06-05 16:45:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:38,726 INFO L482 AbstractCegarLoop]: Abstraction has 5562 states and 16047 transitions. [2021-06-05 16:45:38,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 16:45:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16047 transitions. [2021-06-05 16:45:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:38,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:38,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:38,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:45:38,934 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:38,934 INFO L82 PathProgramCache]: Analyzing trace with hash -862511400, now seen corresponding path program 45 times [2021-06-05 16:45:38,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:38,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084864705] [2021-06-05 16:45:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:39,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:39,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084864705] [2021-06-05 16:45:39,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084864705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:39,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018898848] [2021-06-05 16:45:39,079 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 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 [2021-06-05 16:45:39,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:39,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:39,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018898848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:39,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:39,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:45:39,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452518761] [2021-06-05 16:45:39,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:39,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:39,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:39,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:39,304 INFO L87 Difference]: Start difference. First operand 5562 states and 16047 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-06-05 16:45:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:39,458 INFO L93 Difference]: Finished difference Result 6381 states and 18213 transitions. [2021-06-05 16:45:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:39,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) Word has length 34 [2021-06-05 16:45:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:39,468 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 16:45:39,468 INFO L226 Difference]: Without dead ends: 6305 [2021-06-05 16:45:39,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-06-05 16:45:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5827. [2021-06-05 16:45:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 5826 states have (on average 2.8884311706144867) internal successors, (16828), 5826 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 16828 transitions. [2021-06-05 16:45:39,541 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 16828 transitions. Word has length 34 [2021-06-05 16:45:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:39,541 INFO L482 AbstractCegarLoop]: Abstraction has 5827 states and 16828 transitions. [2021-06-05 16:45:39,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-06-05 16:45:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 16828 transitions. [2021-06-05 16:45:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:39,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:39,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:39,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:39,750 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:39,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1403446700, now seen corresponding path program 46 times [2021-06-05 16:45:39,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:39,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687958060] [2021-06-05 16:45:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:39,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:39,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687958060] [2021-06-05 16:45:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687958060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:39,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503474286] [2021-06-05 16:45:39,894 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 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 [2021-06-05 16:45:39,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:39,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:39,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:40,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503474286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:40,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:40,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:40,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176048425] [2021-06-05 16:45:40,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:45:40,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:40,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:45:40,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:40,124 INFO L87 Difference]: Start difference. First operand 5827 states and 16828 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:40,381 INFO L93 Difference]: Finished difference Result 7509 states and 21608 transitions. [2021-06-05 16:45:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:40,395 INFO L225 Difference]: With dead ends: 7509 [2021-06-05 16:45:40,395 INFO L226 Difference]: Without dead ends: 7419 [2021-06-05 16:45:40,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7419 states. [2021-06-05 16:45:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7419 to 7227. [2021-06-05 16:45:40,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7227 states, 7226 states have (on average 2.9022972598948242) internal successors, (20972), 7226 states have internal predecessors, (20972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7227 states to 7227 states and 20972 transitions. [2021-06-05 16:45:40,524 INFO L78 Accepts]: Start accepts. Automaton has 7227 states and 20972 transitions. Word has length 34 [2021-06-05 16:45:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:40,524 INFO L482 AbstractCegarLoop]: Abstraction has 7227 states and 20972 transitions. [2021-06-05 16:45:40,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7227 states and 20972 transitions. [2021-06-05 16:45:40,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:40,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:40,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:40,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:40,748 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:40,748 INFO L82 PathProgramCache]: Analyzing trace with hash 180516264, now seen corresponding path program 47 times [2021-06-05 16:45:40,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:40,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482213289] [2021-06-05 16:45:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:40,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:40,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482213289] [2021-06-05 16:45:40,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482213289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:40,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899788387] [2021-06-05 16:45:40,910 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 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 [2021-06-05 16:45:40,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:45:40,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:40,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:41,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899788387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:41,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:41,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 16:45:41,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071718009] [2021-06-05 16:45:41,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:41,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:41,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:41,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:41,110 INFO L87 Difference]: Start difference. First operand 7227 states and 20972 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:41,297 INFO L93 Difference]: Finished difference Result 7681 states and 22109 transitions. [2021-06-05 16:45:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:45:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:41,307 INFO L225 Difference]: With dead ends: 7681 [2021-06-05 16:45:41,307 INFO L226 Difference]: Without dead ends: 7573 [2021-06-05 16:45:41,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2021-06-05 16:45:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7191. [2021-06-05 16:45:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 2.9009735744089014) internal successors, (20858), 7190 states have internal predecessors, (20858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 20858 transitions. [2021-06-05 16:45:41,407 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 20858 transitions. Word has length 34 [2021-06-05 16:45:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:41,407 INFO L482 AbstractCegarLoop]: Abstraction has 7191 states and 20858 transitions. [2021-06-05 16:45:41,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 20858 transitions. [2021-06-05 16:45:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:41,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:41,417 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:41,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 16:45:41,640 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:41,640 INFO L82 PathProgramCache]: Analyzing trace with hash 576311422, now seen corresponding path program 48 times [2021-06-05 16:45:41,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:41,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000387471] [2021-06-05 16:45:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:41,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:41,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000387471] [2021-06-05 16:45:41,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000387471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:41,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862003884] [2021-06-05 16:45:41,742 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 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 [2021-06-05 16:45:41,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:41,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:41,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:41,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862003884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:41,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:41,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:45:41,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94567022] [2021-06-05 16:45:41,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:41,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:41,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:41,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:41,961 INFO L87 Difference]: Start difference. First operand 7191 states and 20858 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:42,145 INFO L93 Difference]: Finished difference Result 8299 states and 23923 transitions. [2021-06-05 16:45:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:42,155 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 16:45:42,155 INFO L226 Difference]: Without dead ends: 8182 [2021-06-05 16:45:42,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-06-05 16:45:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7911. [2021-06-05 16:45:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7910 states have (on average 2.9107458912768647) internal successors, (23024), 7910 states have internal predecessors, (23024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 23024 transitions. [2021-06-05 16:45:42,277 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 23024 transitions. Word has length 34 [2021-06-05 16:45:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:42,277 INFO L482 AbstractCegarLoop]: Abstraction has 7911 states and 23024 transitions. [2021-06-05 16:45:42,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 23024 transitions. [2021-06-05 16:45:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:42,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:42,287 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:42,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:42,489 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1774559878, now seen corresponding path program 49 times [2021-06-05 16:45:42,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:42,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395320020] [2021-06-05 16:45:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:45:42,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:42,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395320020] [2021-06-05 16:45:42,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395320020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:42,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035113529] [2021-06-05 16:45:42,589 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 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 [2021-06-05 16:45:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:42,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035113529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:42,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:42,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:45:42,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638079593] [2021-06-05 16:45:42,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:42,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:42,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:42,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:42,788 INFO L87 Difference]: Start difference. First operand 7911 states and 23024 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:43,000 INFO L93 Difference]: Finished difference Result 8695 states and 25141 transitions. [2021-06-05 16:45:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:43,011 INFO L225 Difference]: With dead ends: 8695 [2021-06-05 16:45:43,012 INFO L226 Difference]: Without dead ends: 8578 [2021-06-05 16:45:43,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2021-06-05 16:45:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 8323. [2021-06-05 16:45:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 2.918048546022591) internal successors, (24284), 8322 states have internal predecessors, (24284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 24284 transitions. [2021-06-05 16:45:43,117 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 24284 transitions. Word has length 34 [2021-06-05 16:45:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:43,117 INFO L482 AbstractCegarLoop]: Abstraction has 8323 states and 24284 transitions. [2021-06-05 16:45:43,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 24284 transitions. [2021-06-05 16:45:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:43,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:43,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:43,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 16:45:43,326 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1520972218, now seen corresponding path program 50 times [2021-06-05 16:45:43,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:43,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870565534] [2021-06-05 16:45:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:43,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:43,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870565534] [2021-06-05 16:45:43,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870565534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:43,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054433316] [2021-06-05 16:45:43,439 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 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 [2021-06-05 16:45:43,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:43,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:43,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:43,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054433316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:43,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:43,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:43,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211822570] [2021-06-05 16:45:43,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:45:43,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:45:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:43,700 INFO L87 Difference]: Start difference. First operand 8323 states and 24284 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:43,887 INFO L93 Difference]: Finished difference Result 8641 states and 24990 transitions. [2021-06-05 16:45:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:43,898 INFO L225 Difference]: With dead ends: 8641 [2021-06-05 16:45:43,898 INFO L226 Difference]: Without dead ends: 8565 [2021-06-05 16:45:43,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-06-05 16:45:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 8317. [2021-06-05 16:45:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 8316 states have (on average 2.9183501683501682) internal successors, (24269), 8316 states have internal predecessors, (24269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 24269 transitions. [2021-06-05 16:45:44,020 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 24269 transitions. Word has length 34 [2021-06-05 16:45:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:44,020 INFO L482 AbstractCegarLoop]: Abstraction has 8317 states and 24269 transitions. [2021-06-05 16:45:44,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 24269 transitions. [2021-06-05 16:45:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:44,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:44,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:44,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:44,230 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash -339756294, now seen corresponding path program 51 times [2021-06-05 16:45:44,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:44,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713071623] [2021-06-05 16:45:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:44,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:44,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713071623] [2021-06-05 16:45:44,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713071623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:44,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007526728] [2021-06-05 16:45:44,366 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 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 [2021-06-05 16:45:44,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:44,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:44,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007526728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:44,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:44,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 16:45:44,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432213785] [2021-06-05 16:45:44,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:45:44,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:44,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:45:44,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:45:44,536 INFO L87 Difference]: Start difference. First operand 8317 states and 24269 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:44,727 INFO L93 Difference]: Finished difference Result 12332 states and 36170 transitions. [2021-06-05 16:45:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:44,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:44,749 INFO L225 Difference]: With dead ends: 12332 [2021-06-05 16:45:44,749 INFO L226 Difference]: Without dead ends: 12295 [2021-06-05 16:45:44,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-06-05 16:45:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 8325. [2021-06-05 16:45:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 8324 states have (on average 2.917948101874099) internal successors, (24289), 8324 states have internal predecessors, (24289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 24289 transitions. [2021-06-05 16:45:44,880 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 24289 transitions. Word has length 34 [2021-06-05 16:45:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:44,881 INFO L482 AbstractCegarLoop]: Abstraction has 8325 states and 24289 transitions. [2021-06-05 16:45:44,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 24289 transitions. [2021-06-05 16:45:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:44,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:44,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:45,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:45,137 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:45,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2051845890, now seen corresponding path program 52 times [2021-06-05 16:45:45,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:45,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242148235] [2021-06-05 16:45:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:45,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:45,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242148235] [2021-06-05 16:45:45,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242148235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:45,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561701153] [2021-06-05 16:45:45,262 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 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 [2021-06-05 16:45:45,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:45,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:45,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561701153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:45,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:45,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:45:45,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318042640] [2021-06-05 16:45:45,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:45,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:45,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:45,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:45,426 INFO L87 Difference]: Start difference. First operand 8325 states and 24289 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:45,596 INFO L93 Difference]: Finished difference Result 12300 states and 36126 transitions. [2021-06-05 16:45:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:45:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:45,613 INFO L225 Difference]: With dead ends: 12300 [2021-06-05 16:45:45,613 INFO L226 Difference]: Without dead ends: 12263 [2021-06-05 16:45:45,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2021-06-05 16:45:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 8347. [2021-06-05 16:45:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8347 states, 8346 states have (on average 2.9180445722501798) internal successors, (24354), 8346 states have internal predecessors, (24354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 24354 transitions. [2021-06-05 16:45:45,746 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 24354 transitions. Word has length 34 [2021-06-05 16:45:45,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:45,746 INFO L482 AbstractCegarLoop]: Abstraction has 8347 states and 24354 transitions. [2021-06-05 16:45:45,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 24354 transitions. [2021-06-05 16:45:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:45,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:45,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:45,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:45,956 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1363343686, now seen corresponding path program 53 times [2021-06-05 16:45:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:45,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009810803] [2021-06-05 16:45:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:46,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009810803] [2021-06-05 16:45:46,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009810803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512447371] [2021-06-05 16:45:46,081 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 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 [2021-06-05 16:45:46,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:46,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:46,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:46,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512447371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:46,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:46,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:45:46,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762812098] [2021-06-05 16:45:46,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:46,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:46,290 INFO L87 Difference]: Start difference. First operand 8347 states and 24354 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:46,513 INFO L93 Difference]: Finished difference Result 12845 states and 37674 transitions. [2021-06-05 16:45:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:46,531 INFO L225 Difference]: With dead ends: 12845 [2021-06-05 16:45:46,531 INFO L226 Difference]: Without dead ends: 12771 [2021-06-05 16:45:46,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-06-05 16:45:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 8781. [2021-06-05 16:45:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 2.9197038724373576) internal successors, (25635), 8780 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 25635 transitions. [2021-06-05 16:45:46,692 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 25635 transitions. Word has length 34 [2021-06-05 16:45:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:46,692 INFO L482 AbstractCegarLoop]: Abstraction has 8781 states and 25635 transitions. [2021-06-05 16:45:46,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 25635 transitions. [2021-06-05 16:45:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:46,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:46,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:46,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:46,905 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1176620350, now seen corresponding path program 54 times [2021-06-05 16:45:46,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:46,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629548204] [2021-06-05 16:45:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:47,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:47,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629548204] [2021-06-05 16:45:47,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629548204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:47,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392014154] [2021-06-05 16:45:47,015 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 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 [2021-06-05 16:45:47,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:47,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:45:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:47,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392014154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:47,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:47,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 16:45:47,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626050691] [2021-06-05 16:45:47,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:45:47,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:45:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:47,202 INFO L87 Difference]: Start difference. First operand 8781 states and 25635 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:47,816 INFO L93 Difference]: Finished difference Result 14288 states and 41566 transitions. [2021-06-05 16:45:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:45:47,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:47,836 INFO L225 Difference]: With dead ends: 14288 [2021-06-05 16:45:47,837 INFO L226 Difference]: Without dead ends: 14180 [2021-06-05 16:45:47,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:45:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14180 states. [2021-06-05 16:45:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14180 to 9669. [2021-06-05 16:45:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9669 states, 9668 states have (on average 2.929354571783202) internal successors, (28321), 9668 states have internal predecessors, (28321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9669 states to 9669 states and 28321 transitions. [2021-06-05 16:45:48,062 INFO L78 Accepts]: Start accepts. Automaton has 9669 states and 28321 transitions. Word has length 34 [2021-06-05 16:45:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:48,062 INFO L482 AbstractCegarLoop]: Abstraction has 9669 states and 28321 transitions. [2021-06-05 16:45:48,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9669 states and 28321 transitions. [2021-06-05 16:45:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:48,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:48,073 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:48,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 16:45:48,273 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:48,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1063331952, now seen corresponding path program 55 times [2021-06-05 16:45:48,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:48,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161090710] [2021-06-05 16:45:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:48,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161090710] [2021-06-05 16:45:48,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161090710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664054673] [2021-06-05 16:45:48,450 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 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 [2021-06-05 16:45:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:48,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664054673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:48,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:48,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:45:48,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755156878] [2021-06-05 16:45:48,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:48,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:48,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:48,635 INFO L87 Difference]: Start difference. First operand 9669 states and 28321 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-06-05 16:45:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:48,805 INFO L93 Difference]: Finished difference Result 10725 states and 31154 transitions. [2021-06-05 16:45:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:48,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) Word has length 34 [2021-06-05 16:45:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:48,819 INFO L225 Difference]: With dead ends: 10725 [2021-06-05 16:45:48,819 INFO L226 Difference]: Without dead ends: 10651 [2021-06-05 16:45:48,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2021-06-05 16:45:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 10003. [2021-06-05 16:45:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10002 states have (on average 2.931613677264547) internal successors, (29322), 10002 states have internal predecessors, (29322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 29322 transitions. [2021-06-05 16:45:48,956 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 29322 transitions. Word has length 34 [2021-06-05 16:45:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:48,956 INFO L482 AbstractCegarLoop]: Abstraction has 10003 states and 29322 transitions. [2021-06-05 16:45:48,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-06-05 16:45:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 29322 transitions. [2021-06-05 16:45:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:48,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:48,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:49,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:49,167 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:49,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1983656864, now seen corresponding path program 56 times [2021-06-05 16:45:49,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:49,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143842593] [2021-06-05 16:45:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:49,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143842593] [2021-06-05 16:45:49,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143842593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632702312] [2021-06-05 16:45:49,270 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 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 [2021-06-05 16:45:49,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:49,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:49,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:49,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632702312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:49,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:49,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:45:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53998150] [2021-06-05 16:45:49,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:49,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:49,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:49,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:49,476 INFO L87 Difference]: Start difference. First operand 10003 states and 29322 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 16:45:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:49,658 INFO L93 Difference]: Finished difference Result 10805 states and 31382 transitions. [2021-06-05 16:45:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:49,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) Word has length 34 [2021-06-05 16:45:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:49,715 INFO L225 Difference]: With dead ends: 10805 [2021-06-05 16:45:49,716 INFO L226 Difference]: Without dead ends: 10731 [2021-06-05 16:45:49,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10731 states. [2021-06-05 16:45:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10731 to 9581. [2021-06-05 16:45:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 2.9305845511482254) internal successors, (28075), 9580 states have internal predecessors, (28075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 28075 transitions. [2021-06-05 16:45:49,888 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 28075 transitions. Word has length 34 [2021-06-05 16:45:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:49,888 INFO L482 AbstractCegarLoop]: Abstraction has 9581 states and 28075 transitions. [2021-06-05 16:45:49,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 16:45:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 28075 transitions. [2021-06-05 16:45:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:49,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:49,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:50,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:50,100 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1691006202, now seen corresponding path program 57 times [2021-06-05 16:45:50,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:50,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614780877] [2021-06-05 16:45:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:50,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614780877] [2021-06-05 16:45:50,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614780877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817668664] [2021-06-05 16:45:50,209 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 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 [2021-06-05 16:45:50,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:45:50,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:50,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:50,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817668664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:50,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:50,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:45:50,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664531075] [2021-06-05 16:45:50,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:50,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:50,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:50,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:50,426 INFO L87 Difference]: Start difference. First operand 9581 states and 28075 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 16:45:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:50,685 INFO L93 Difference]: Finished difference Result 11489 states and 33477 transitions. [2021-06-05 16:45:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:50,686 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) Word has length 34 [2021-06-05 16:45:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:50,701 INFO L225 Difference]: With dead ends: 11489 [2021-06-05 16:45:50,701 INFO L226 Difference]: Without dead ends: 11399 [2021-06-05 16:45:50,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-06-05 16:45:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 10345. [2021-06-05 16:45:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10345 states, 10344 states have (on average 2.93899845320959) internal successors, (30401), 10344 states have internal predecessors, (30401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10345 states to 10345 states and 30401 transitions. [2021-06-05 16:45:50,839 INFO L78 Accepts]: Start accepts. Automaton has 10345 states and 30401 transitions. Word has length 34 [2021-06-05 16:45:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:50,839 INFO L482 AbstractCegarLoop]: Abstraction has 10345 states and 30401 transitions. [2021-06-05 16:45:50,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-06-05 16:45:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10345 states and 30401 transitions. [2021-06-05 16:45:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:50,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:50,850 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:51,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:51,051 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1810089214, now seen corresponding path program 58 times [2021-06-05 16:45:51,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:51,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635493529] [2021-06-05 16:45:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:45:51,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:51,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635493529] [2021-06-05 16:45:51,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635493529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:51,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397246045] [2021-06-05 16:45:51,146 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 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 [2021-06-05 16:45:51,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:51,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397246045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:51,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:51,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:45:51,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591986056] [2021-06-05 16:45:51,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:51,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:51,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:51,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:51,331 INFO L87 Difference]: Start difference. First operand 10345 states and 30401 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:51,561 INFO L93 Difference]: Finished difference Result 11481 states and 33447 transitions. [2021-06-05 16:45:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:51,576 INFO L225 Difference]: With dead ends: 11481 [2021-06-05 16:45:51,576 INFO L226 Difference]: Without dead ends: 11365 [2021-06-05 16:45:51,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11365 states. [2021-06-05 16:45:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11365 to 10339. [2021-06-05 16:45:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 2.9367382472431807) internal successors, (30360), 10338 states have internal predecessors, (30360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 30360 transitions. [2021-06-05 16:45:51,759 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 30360 transitions. Word has length 34 [2021-06-05 16:45:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:51,759 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 30360 transitions. [2021-06-05 16:45:51,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 30360 transitions. [2021-06-05 16:45:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:51,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:51,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:51,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 16:45:51,993 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:51,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1665801632, now seen corresponding path program 59 times [2021-06-05 16:45:51,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:51,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955963113] [2021-06-05 16:45:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:52,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:52,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955963113] [2021-06-05 16:45:52,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955963113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:52,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416980910] [2021-06-05 16:45:52,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:45:52,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:45:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:52,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416980910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:52,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:52,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:45:52,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967808334] [2021-06-05 16:45:52,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:52,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:52,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:52,266 INFO L87 Difference]: Start difference. First operand 10339 states and 30360 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-06-05 16:45:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:52,532 INFO L93 Difference]: Finished difference Result 11183 states and 32491 transitions. [2021-06-05 16:45:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:45:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) Word has length 34 [2021-06-05 16:45:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:52,546 INFO L225 Difference]: With dead ends: 11183 [2021-06-05 16:45:52,547 INFO L226 Difference]: Without dead ends: 11066 [2021-06-05 16:45:52,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:45:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11066 states. [2021-06-05 16:45:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11066 to 9849. [2021-06-05 16:45:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9848 states have (on average 2.933489033306255) internal successors, (28889), 9848 states have internal predecessors, (28889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 28889 transitions. [2021-06-05 16:45:52,681 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 28889 transitions. Word has length 34 [2021-06-05 16:45:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:52,681 INFO L482 AbstractCegarLoop]: Abstraction has 9849 states and 28889 transitions. [2021-06-05 16:45:52,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2021-06-05 16:45:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 28889 transitions. [2021-06-05 16:45:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:52,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:52,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:52,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:52,893 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1957855712, now seen corresponding path program 60 times [2021-06-05 16:45:52,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:52,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931574968] [2021-06-05 16:45:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:52,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:52,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931574968] [2021-06-05 16:45:52,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931574968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:52,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549691019] [2021-06-05 16:45:52,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:45:53,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:53,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:53,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:53,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:53,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549691019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:53,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:53,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:53,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210293331] [2021-06-05 16:45:53,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:45:53,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:53,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:45:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:53,215 INFO L87 Difference]: Start difference. First operand 9849 states and 28889 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:53,454 INFO L93 Difference]: Finished difference Result 11201 states and 32696 transitions. [2021-06-05 16:45:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:53,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:53,469 INFO L225 Difference]: With dead ends: 11201 [2021-06-05 16:45:53,470 INFO L226 Difference]: Without dead ends: 11107 [2021-06-05 16:45:53,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11107 states. [2021-06-05 16:45:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11107 to 10839. [2021-06-05 16:45:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10839 states, 10838 states have (on average 2.9409485144860676) internal successors, (31874), 10838 states have internal predecessors, (31874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 31874 transitions. [2021-06-05 16:45:53,655 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 31874 transitions. Word has length 34 [2021-06-05 16:45:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:53,655 INFO L482 AbstractCegarLoop]: Abstraction has 10839 states and 31874 transitions. [2021-06-05 16:45:53,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 31874 transitions. [2021-06-05 16:45:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:53,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:53,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:53,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 16:45:53,869 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1517139066, now seen corresponding path program 61 times [2021-06-05 16:45:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:53,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374329824] [2021-06-05 16:45:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:53,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:53,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374329824] [2021-06-05 16:45:53,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374329824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:53,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828159071] [2021-06-05 16:45:53,967 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 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 [2021-06-05 16:45:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:54,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828159071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:54,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:54,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:45:54,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201042813] [2021-06-05 16:45:54,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:54,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:54,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:54,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:54,184 INFO L87 Difference]: Start difference. First operand 10839 states and 31874 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:54,469 INFO L93 Difference]: Finished difference Result 11645 states and 34056 transitions. [2021-06-05 16:45:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:54,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:54,491 INFO L225 Difference]: With dead ends: 11645 [2021-06-05 16:45:54,491 INFO L226 Difference]: Without dead ends: 11537 [2021-06-05 16:45:54,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-06-05 16:45:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 10493. [2021-06-05 16:45:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10493 states, 10492 states have (on average 2.9400495615707207) internal successors, (30847), 10492 states have internal predecessors, (30847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10493 states to 10493 states and 30847 transitions. [2021-06-05 16:45:54,690 INFO L78 Accepts]: Start accepts. Automaton has 10493 states and 30847 transitions. Word has length 34 [2021-06-05 16:45:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:54,690 INFO L482 AbstractCegarLoop]: Abstraction has 10493 states and 30847 transitions. [2021-06-05 16:45:54,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10493 states and 30847 transitions. [2021-06-05 16:45:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:54,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:54,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:54,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 16:45:54,903 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:54,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1039269088, now seen corresponding path program 62 times [2021-06-05 16:45:54,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:54,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112091886] [2021-06-05 16:45:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:54,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:54,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112091886] [2021-06-05 16:45:54,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112091886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:54,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211976614] [2021-06-05 16:45:54,978 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 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 [2021-06-05 16:45:55,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:55,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:55,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:55,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211976614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:55,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:55,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 16:45:55,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425229343] [2021-06-05 16:45:55,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:55,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:55,184 INFO L87 Difference]: Start difference. First operand 10493 states and 30847 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:55,363 INFO L93 Difference]: Finished difference Result 12117 states and 35549 transitions. [2021-06-05 16:45:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:45:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:55,379 INFO L225 Difference]: With dead ends: 12117 [2021-06-05 16:45:55,380 INFO L226 Difference]: Without dead ends: 12035 [2021-06-05 16:45:55,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 192.1ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12035 states. [2021-06-05 16:45:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12035 to 11671. [2021-06-05 16:45:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 2.948928877463582) internal successors, (34414), 11670 states have internal predecessors, (34414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 34414 transitions. [2021-06-05 16:45:55,566 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 34414 transitions. Word has length 34 [2021-06-05 16:45:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:55,566 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 34414 transitions. [2021-06-05 16:45:55,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 34414 transitions. [2021-06-05 16:45:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:55,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:55,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:55,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 16:45:55,780 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:55,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1158352100, now seen corresponding path program 63 times [2021-06-05 16:45:55,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:55,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439769319] [2021-06-05 16:45:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:45:55,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:55,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439769319] [2021-06-05 16:45:55,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439769319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:55,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076276953] [2021-06-05 16:45:55,854 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 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 [2021-06-05 16:45:55,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:55,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:55,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:56,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076276953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:56,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:56,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 16:45:56,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644736828] [2021-06-05 16:45:56,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:45:56,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:56,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:45:56,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:45:56,033 INFO L87 Difference]: Start difference. First operand 11671 states and 34414 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:56,232 INFO L93 Difference]: Finished difference Result 12114 states and 35537 transitions. [2021-06-05 16:45:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:45:56,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:56,249 INFO L225 Difference]: With dead ends: 12114 [2021-06-05 16:45:56,249 INFO L226 Difference]: Without dead ends: 12002 [2021-06-05 16:45:56,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-05 16:45:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 11231. [2021-06-05 16:45:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11231 states, 11230 states have (on average 2.943900267141585) internal successors, (33060), 11230 states have internal predecessors, (33060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11231 states to 11231 states and 33060 transitions. [2021-06-05 16:45:56,406 INFO L78 Accepts]: Start accepts. Automaton has 11231 states and 33060 transitions. Word has length 34 [2021-06-05 16:45:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:56,406 INFO L482 AbstractCegarLoop]: Abstraction has 11231 states and 33060 transitions. [2021-06-05 16:45:56,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 11231 states and 33060 transitions. [2021-06-05 16:45:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:56,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:56,419 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:56,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:56,625 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1014064518, now seen corresponding path program 64 times [2021-06-05 16:45:56,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:56,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952846001] [2021-06-05 16:45:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:45:56,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:56,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952846001] [2021-06-05 16:45:56,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952846001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:56,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005010850] [2021-06-05 16:45:56,728 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 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 [2021-06-05 16:45:56,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:56,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:56,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:56,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:56,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005010850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:56,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:56,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:45:56,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720838537] [2021-06-05 16:45:56,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:56,913 INFO L87 Difference]: Start difference. First operand 11231 states and 33060 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:57,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:57,170 INFO L93 Difference]: Finished difference Result 12011 states and 35167 transitions. [2021-06-05 16:45:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:45:57,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:57,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:57,187 INFO L225 Difference]: With dead ends: 12011 [2021-06-05 16:45:57,187 INFO L226 Difference]: Without dead ends: 11894 [2021-06-05 16:45:57,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2021-06-05 16:45:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 11643. [2021-06-05 16:45:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11643 states, 11642 states have (on average 2.9479470881291876) internal successors, (34320), 11642 states have internal predecessors, (34320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 34320 transitions. [2021-06-05 16:45:57,414 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 34320 transitions. Word has length 34 [2021-06-05 16:45:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:57,414 INFO L482 AbstractCegarLoop]: Abstraction has 11643 states and 34320 transitions. [2021-06-05 16:45:57,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 34320 transitions. [2021-06-05 16:45:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:45:57,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:57,428 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:57,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:57,629 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:57,629 INFO L82 PathProgramCache]: Analyzing trace with hash -14629318, now seen corresponding path program 65 times [2021-06-05 16:45:57,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:57,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263521081] [2021-06-05 16:45:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:57,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:57,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263521081] [2021-06-05 16:45:57,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263521081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:57,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640594005] [2021-06-05 16:45:57,763 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 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 [2021-06-05 16:45:57,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:45:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:45:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:57,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640594005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:57,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:57,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480495592] [2021-06-05 16:45:57,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:45:57,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:57,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:45:57,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:57,995 INFO L87 Difference]: Start difference. First operand 11643 states and 34320 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:58,219 INFO L93 Difference]: Finished difference Result 11957 states and 35016 transitions. [2021-06-05 16:45:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:58,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 16:45:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:58,240 INFO L225 Difference]: With dead ends: 11957 [2021-06-05 16:45:58,241 INFO L226 Difference]: Without dead ends: 11881 [2021-06-05 16:45:58,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-06-05 16:45:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 10363. [2021-06-05 16:45:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 2.945377340281799) internal successors, (30520), 10362 states have internal predecessors, (30520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 30520 transitions. [2021-06-05 16:45:58,410 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 30520 transitions. Word has length 34 [2021-06-05 16:45:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:58,410 INFO L482 AbstractCegarLoop]: Abstraction has 10363 states and 30520 transitions. [2021-06-05 16:45:58,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 30520 transitions. [2021-06-05 16:45:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:45:58,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:58,422 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:58,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:58,622 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -826580692, now seen corresponding path program 66 times [2021-06-05 16:45:58,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:58,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385303672] [2021-06-05 16:45:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:58,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:58,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385303672] [2021-06-05 16:45:58,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385303672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:58,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548044710] [2021-06-05 16:45:58,663 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 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 [2021-06-05 16:45:58,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:45:58,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:45:58,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548044710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:58,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:58,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:45:58,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004242630] [2021-06-05 16:45:58,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:45:58,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:58,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:45:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:58,766 INFO L87 Difference]: Start difference. First operand 10363 states and 30520 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:58,949 INFO L93 Difference]: Finished difference Result 14684 states and 43273 transitions. [2021-06-05 16:45:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:45:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:45:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:58,970 INFO L225 Difference]: With dead ends: 14684 [2021-06-05 16:45:58,970 INFO L226 Difference]: Without dead ends: 14684 [2021-06-05 16:45:58,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14684 states. [2021-06-05 16:45:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14684 to 10709. [2021-06-05 16:45:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 2.941912588718715) internal successors, (31502), 10708 states have internal predecessors, (31502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31502 transitions. [2021-06-05 16:45:59,142 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31502 transitions. Word has length 37 [2021-06-05 16:45:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:59,142 INFO L482 AbstractCegarLoop]: Abstraction has 10709 states and 31502 transitions. [2021-06-05 16:45:59,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31502 transitions. [2021-06-05 16:45:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:45:59,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:59,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:59,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 16:45:59,356 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:59,356 INFO L82 PathProgramCache]: Analyzing trace with hash -179080118, now seen corresponding path program 67 times [2021-06-05 16:45:59,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:59,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288787788] [2021-06-05 16:45:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:59,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:59,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288787788] [2021-06-05 16:45:59,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288787788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:59,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115873060] [2021-06-05 16:45:59,389 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 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 [2021-06-05 16:45:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:45:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:59,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115873060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:59,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:59,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:45:59,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955334326] [2021-06-05 16:45:59,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:45:59,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:59,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:45:59,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:45:59,499 INFO L87 Difference]: Start difference. First operand 10709 states and 31502 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:59,718 INFO L93 Difference]: Finished difference Result 17639 states and 51455 transitions. [2021-06-05 16:45:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:45:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:45:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:59,753 INFO L225 Difference]: With dead ends: 17639 [2021-06-05 16:45:59,753 INFO L226 Difference]: Without dead ends: 17573 [2021-06-05 16:45:59,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17573 states. [2021-06-05 16:45:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17573 to 10709. [2021-06-05 16:45:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 2.941072095629436) internal successors, (31493), 10708 states have internal predecessors, (31493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31493 transitions. [2021-06-05 16:45:59,965 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31493 transitions. Word has length 37 [2021-06-05 16:45:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:59,965 INFO L482 AbstractCegarLoop]: Abstraction has 10709 states and 31493 transitions. [2021-06-05 16:45:59,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31493 transitions. [2021-06-05 16:45:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:45:59,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:59,978 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:00,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 16:46:00,179 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1381181770, now seen corresponding path program 68 times [2021-06-05 16:46:00,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:00,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966896532] [2021-06-05 16:46:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:00,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:00,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966896532] [2021-06-05 16:46:00,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966896532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:00,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362536032] [2021-06-05 16:46:00,211 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 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 [2021-06-05 16:46:00,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:00,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:00,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362536032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:00,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:00,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:00,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117805832] [2021-06-05 16:46:00,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:00,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:00,327 INFO L87 Difference]: Start difference. First operand 10709 states and 31493 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-06-05 16:46:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:00,827 INFO L93 Difference]: Finished difference Result 22210 states and 64100 transitions. [2021-06-05 16:46:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:46:00,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) Word has length 37 [2021-06-05 16:46:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:00,858 INFO L225 Difference]: With dead ends: 22210 [2021-06-05 16:46:00,858 INFO L226 Difference]: Without dead ends: 22204 [2021-06-05 16:46:00,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:46:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22204 states. [2021-06-05 16:46:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22204 to 14316. [2021-06-05 16:46:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14316 states, 14315 states have (on average 2.958435207823961) internal successors, (42350), 14315 states have internal predecessors, (42350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14316 states to 14316 states and 42350 transitions. [2021-06-05 16:46:01,155 INFO L78 Accepts]: Start accepts. Automaton has 14316 states and 42350 transitions. Word has length 37 [2021-06-05 16:46:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:01,155 INFO L482 AbstractCegarLoop]: Abstraction has 14316 states and 42350 transitions. [2021-06-05 16:46:01,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-06-05 16:46:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 14316 states and 42350 transitions. [2021-06-05 16:46:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:01,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:01,173 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:01,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 16:46:01,373 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:01,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:01,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1170484724, now seen corresponding path program 69 times [2021-06-05 16:46:01,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:01,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070442130] [2021-06-05 16:46:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:01,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:01,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070442130] [2021-06-05 16:46:01,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070442130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:01,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581973386] [2021-06-05 16:46:01,415 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 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 [2021-06-05 16:46:01,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:46:01,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:01,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:01,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581973386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:01,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:01,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:01,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757071414] [2021-06-05 16:46:01,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:01,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:01,518 INFO L87 Difference]: Start difference. First operand 14316 states and 42350 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:01,942 INFO L93 Difference]: Finished difference Result 18669 states and 54267 transitions. [2021-06-05 16:46:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:46:01,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:01,968 INFO L225 Difference]: With dead ends: 18669 [2021-06-05 16:46:01,969 INFO L226 Difference]: Without dead ends: 18657 [2021-06-05 16:46:01,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:46:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18657 states. [2021-06-05 16:46:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18657 to 15376. [2021-06-05 16:46:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15376 states, 15375 states have (on average 2.9668943089430893) internal successors, (45616), 15375 states have internal predecessors, (45616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15376 states to 15376 states and 45616 transitions. [2021-06-05 16:46:02,223 INFO L78 Accepts]: Start accepts. Automaton has 15376 states and 45616 transitions. Word has length 37 [2021-06-05 16:46:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:02,223 INFO L482 AbstractCegarLoop]: Abstraction has 15376 states and 45616 transitions. [2021-06-05 16:46:02,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 15376 states and 45616 transitions. [2021-06-05 16:46:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:02,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:02,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:02,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:02,443 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:02,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1899236542, now seen corresponding path program 70 times [2021-06-05 16:46:02,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:02,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729624088] [2021-06-05 16:46:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:02,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:02,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729624088] [2021-06-05 16:46:02,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729624088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:02,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148690021] [2021-06-05 16:46:02,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:46:02,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:02,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:02,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148690021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:02,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:02,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:02,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801430560] [2021-06-05 16:46:02,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:02,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:02,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:02,575 INFO L87 Difference]: Start difference. First operand 15376 states and 45616 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:03,037 INFO L93 Difference]: Finished difference Result 19128 states and 55390 transitions. [2021-06-05 16:46:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:46:03,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:03,064 INFO L225 Difference]: With dead ends: 19128 [2021-06-05 16:46:03,064 INFO L226 Difference]: Without dead ends: 19128 [2021-06-05 16:46:03,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:46:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19128 states. [2021-06-05 16:46:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19128 to 13924. [2021-06-05 16:46:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13924 states, 13923 states have (on average 2.95970695970696) internal successors, (41208), 13923 states have internal predecessors, (41208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 41208 transitions. [2021-06-05 16:46:03,304 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 41208 transitions. Word has length 37 [2021-06-05 16:46:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:03,304 INFO L482 AbstractCegarLoop]: Abstraction has 13924 states and 41208 transitions. [2021-06-05 16:46:03,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 41208 transitions. [2021-06-05 16:46:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:03,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:03,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:03,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 16:46:03,604 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1522265388, now seen corresponding path program 71 times [2021-06-05 16:46:03,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:03,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837749901] [2021-06-05 16:46:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:03,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:03,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837749901] [2021-06-05 16:46:03,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837749901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:03,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823547796] [2021-06-05 16:46:03,634 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 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 [2021-06-05 16:46:03,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:46:03,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:03,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:03,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823547796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:03,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:03,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:03,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558187342] [2021-06-05 16:46:03,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:03,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:03,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:03,749 INFO L87 Difference]: Start difference. First operand 13924 states and 41208 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:04,137 INFO L93 Difference]: Finished difference Result 21416 states and 61999 transitions. [2021-06-05 16:46:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:46:04,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:04,167 INFO L225 Difference]: With dead ends: 21416 [2021-06-05 16:46:04,167 INFO L226 Difference]: Without dead ends: 21402 [2021-06-05 16:46:04,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:46:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21402 states. [2021-06-05 16:46:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21402 to 12522. [2021-06-05 16:46:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12522 states, 12521 states have (on average 2.9471288235763917) internal successors, (36901), 12521 states have internal predecessors, (36901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 36901 transitions. [2021-06-05 16:46:04,434 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 36901 transitions. Word has length 37 [2021-06-05 16:46:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:04,434 INFO L482 AbstractCegarLoop]: Abstraction has 12522 states and 36901 transitions. [2021-06-05 16:46:04,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 36901 transitions. [2021-06-05 16:46:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:04,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:04,450 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:04,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:04,651 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:04,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1606664162, now seen corresponding path program 72 times [2021-06-05 16:46:04,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:04,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261815893] [2021-06-05 16:46:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:04,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:04,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261815893] [2021-06-05 16:46:04,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261815893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:04,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449924891] [2021-06-05 16:46:04,699 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 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 [2021-06-05 16:46:04,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:46:04,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:04,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449924891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:04,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:04,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:04,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874536712] [2021-06-05 16:46:04,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:04,812 INFO L87 Difference]: Start difference. First operand 12522 states and 36901 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:05,153 INFO L93 Difference]: Finished difference Result 21217 states and 61477 transitions. [2021-06-05 16:46:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:46:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:05,181 INFO L225 Difference]: With dead ends: 21217 [2021-06-05 16:46:05,182 INFO L226 Difference]: Without dead ends: 21161 [2021-06-05 16:46:05,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:46:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21161 states. [2021-06-05 16:46:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21161 to 13076. [2021-06-05 16:46:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13076 states, 13075 states have (on average 2.944244741873805) internal successors, (38496), 13075 states have internal predecessors, (38496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13076 states to 13076 states and 38496 transitions. [2021-06-05 16:46:05,518 INFO L78 Accepts]: Start accepts. Automaton has 13076 states and 38496 transitions. Word has length 37 [2021-06-05 16:46:05,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:05,518 INFO L482 AbstractCegarLoop]: Abstraction has 13076 states and 38496 transitions. [2021-06-05 16:46:05,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:05,518 INFO L276 IsEmpty]: Start isEmpty. Operand 13076 states and 38496 transitions. [2021-06-05 16:46:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:05,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:05,540 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:05,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 16:46:05,742 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1048265624, now seen corresponding path program 73 times [2021-06-05 16:46:05,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:05,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359102210] [2021-06-05 16:46:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:05,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:05,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359102210] [2021-06-05 16:46:05,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359102210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:05,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719643310] [2021-06-05 16:46:05,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:46:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:05,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:05,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719643310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:05,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:05,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:05,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278988549] [2021-06-05 16:46:05,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:05,931 INFO L87 Difference]: Start difference. First operand 13076 states and 38496 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:06,216 INFO L93 Difference]: Finished difference Result 19540 states and 56766 transitions. [2021-06-05 16:46:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:46:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:06,246 INFO L225 Difference]: With dead ends: 19540 [2021-06-05 16:46:06,246 INFO L226 Difference]: Without dead ends: 19491 [2021-06-05 16:46:06,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:46:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19491 states. [2021-06-05 16:46:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19491 to 13090. [2021-06-05 16:46:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13090 states, 13089 states have (on average 2.9416303766521508) internal successors, (38503), 13089 states have internal predecessors, (38503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13090 states to 13090 states and 38503 transitions. [2021-06-05 16:46:06,507 INFO L78 Accepts]: Start accepts. Automaton has 13090 states and 38503 transitions. Word has length 37 [2021-06-05 16:46:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:06,507 INFO L482 AbstractCegarLoop]: Abstraction has 13090 states and 38503 transitions. [2021-06-05 16:46:06,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 13090 states and 38503 transitions. [2021-06-05 16:46:06,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:06,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:06,523 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:06,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 16:46:06,724 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:06,724 INFO L82 PathProgramCache]: Analyzing trace with hash -272513428, now seen corresponding path program 74 times [2021-06-05 16:46:06,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:06,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319765518] [2021-06-05 16:46:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:06,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319765518] [2021-06-05 16:46:06,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319765518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184767174] [2021-06-05 16:46:06,757 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 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 [2021-06-05 16:46:06,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:06,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184767174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:06,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:06,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:46:06,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565054203] [2021-06-05 16:46:06,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:46:06,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:06,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:46:06,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:46:06,869 INFO L87 Difference]: Start difference. First operand 13090 states and 38503 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:07,277 INFO L93 Difference]: Finished difference Result 18207 states and 52420 transitions. [2021-06-05 16:46:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:46:07,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:07,303 INFO L225 Difference]: With dead ends: 18207 [2021-06-05 16:46:07,303 INFO L226 Difference]: Without dead ends: 18147 [2021-06-05 16:46:07,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:46:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-06-05 16:46:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 13262. [2021-06-05 16:46:07,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13262 states, 13261 states have (on average 2.932584269662921) internal successors, (38889), 13261 states have internal predecessors, (38889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 38889 transitions. [2021-06-05 16:46:07,564 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 38889 transitions. Word has length 37 [2021-06-05 16:46:07,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:07,564 INFO L482 AbstractCegarLoop]: Abstraction has 13262 states and 38889 transitions. [2021-06-05 16:46:07,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 38889 transitions. [2021-06-05 16:46:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:07,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:07,580 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:07,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:07,780 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 144146212, now seen corresponding path program 75 times [2021-06-05 16:46:07,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:07,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555317210] [2021-06-05 16:46:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:07,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:07,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555317210] [2021-06-05 16:46:07,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555317210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:07,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823196854] [2021-06-05 16:46:07,811 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 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 [2021-06-05 16:46:07,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:46:07,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:07,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:08,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823196854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:08,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:08,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:46:08,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068928967] [2021-06-05 16:46:08,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:08,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:08,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:08,061 INFO L87 Difference]: Start difference. First operand 13262 states and 38889 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:08,616 INFO L93 Difference]: Finished difference Result 18702 states and 53466 transitions. [2021-06-05 16:46:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:46:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:08,651 INFO L225 Difference]: With dead ends: 18702 [2021-06-05 16:46:08,652 INFO L226 Difference]: Without dead ends: 18695 [2021-06-05 16:46:08,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:46:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18695 states. [2021-06-05 16:46:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18695 to 13690. [2021-06-05 16:46:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13690 states, 13689 states have (on average 2.9304551099422893) internal successors, (40115), 13689 states have internal predecessors, (40115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13690 states to 13690 states and 40115 transitions. [2021-06-05 16:46:08,962 INFO L78 Accepts]: Start accepts. Automaton has 13690 states and 40115 transitions. Word has length 37 [2021-06-05 16:46:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:08,962 INFO L482 AbstractCegarLoop]: Abstraction has 13690 states and 40115 transitions. [2021-06-05 16:46:08,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 13690 states and 40115 transitions. [2021-06-05 16:46:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:08,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:08,980 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:09,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:09,180 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash -198586448, now seen corresponding path program 76 times [2021-06-05 16:46:09,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:09,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151336123] [2021-06-05 16:46:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:09,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:09,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151336123] [2021-06-05 16:46:09,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151336123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:09,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505389446] [2021-06-05 16:46:09,219 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 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 [2021-06-05 16:46:09,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:09,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:09,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:09,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:09,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505389446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:09,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:09,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:46:09,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845380664] [2021-06-05 16:46:09,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:46:09,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:46:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:46:09,337 INFO L87 Difference]: Start difference. First operand 13690 states and 40115 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:09,779 INFO L93 Difference]: Finished difference Result 19896 states and 57093 transitions. [2021-06-05 16:46:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:46:09,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:09,806 INFO L225 Difference]: With dead ends: 19896 [2021-06-05 16:46:09,806 INFO L226 Difference]: Without dead ends: 19782 [2021-06-05 16:46:09,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:46:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2021-06-05 16:46:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 15598. [2021-06-05 16:46:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15598 states, 15597 states have (on average 2.9260114124511123) internal successors, (45637), 15597 states have internal predecessors, (45637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15598 states to 15598 states and 45637 transitions. [2021-06-05 16:46:10,068 INFO L78 Accepts]: Start accepts. Automaton has 15598 states and 45637 transitions. Word has length 37 [2021-06-05 16:46:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:10,068 INFO L482 AbstractCegarLoop]: Abstraction has 15598 states and 45637 transitions. [2021-06-05 16:46:10,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15598 states and 45637 transitions. [2021-06-05 16:46:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:10,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:10,086 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:10,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 16:46:10,286 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:10,287 INFO L82 PathProgramCache]: Analyzing trace with hash 52875454, now seen corresponding path program 77 times [2021-06-05 16:46:10,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:10,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55195184] [2021-06-05 16:46:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:10,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:10,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55195184] [2021-06-05 16:46:10,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55195184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:10,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891799451] [2021-06-05 16:46:10,316 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 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 [2021-06-05 16:46:10,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:46:10,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:10,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:10,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:10,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891799451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:10,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:10,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 16:46:10,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349958196] [2021-06-05 16:46:10,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:10,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:10,433 INFO L87 Difference]: Start difference. First operand 15598 states and 45637 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:10,928 INFO L93 Difference]: Finished difference Result 23975 states and 68834 transitions. [2021-06-05 16:46:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:46:10,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:10,961 INFO L225 Difference]: With dead ends: 23975 [2021-06-05 16:46:10,962 INFO L226 Difference]: Without dead ends: 23968 [2021-06-05 16:46:10,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:46:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23968 states. [2021-06-05 16:46:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23968 to 19902. [2021-06-05 16:46:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19902 states, 19901 states have (on average 2.9230189437716696) internal successors, (58171), 19901 states have internal predecessors, (58171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 58171 transitions. [2021-06-05 16:46:11,305 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 58171 transitions. Word has length 37 [2021-06-05 16:46:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:11,305 INFO L482 AbstractCegarLoop]: Abstraction has 19902 states and 58171 transitions. [2021-06-05 16:46:11,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 58171 transitions. [2021-06-05 16:46:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:11,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:11,327 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:11,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 16:46:11,528 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1380437010, now seen corresponding path program 78 times [2021-06-05 16:46:11,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:11,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183743142] [2021-06-05 16:46:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:11,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:11,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183743142] [2021-06-05 16:46:11,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183743142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:11,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737092700] [2021-06-05 16:46:11,559 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 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 [2021-06-05 16:46:11,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:46:11,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:11,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:11,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:11,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737092700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:11,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:11,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:46:11,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008304495] [2021-06-05 16:46:11,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:46:11,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:11,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:46:11,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:46:11,683 INFO L87 Difference]: Start difference. First operand 19902 states and 58171 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:11,937 INFO L93 Difference]: Finished difference Result 22936 states and 66683 transitions. [2021-06-05 16:46:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:46:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:11,980 INFO L225 Difference]: With dead ends: 22936 [2021-06-05 16:46:11,980 INFO L226 Difference]: Without dead ends: 22936 [2021-06-05 16:46:11,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22936 states. [2021-06-05 16:46:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22936 to 20168. [2021-06-05 16:46:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 2.9221004611494026) internal successors, (58930), 20167 states have internal predecessors, (58930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58930 transitions. [2021-06-05 16:46:12,336 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58930 transitions. Word has length 37 [2021-06-05 16:46:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:12,337 INFO L482 AbstractCegarLoop]: Abstraction has 20168 states and 58930 transitions. [2021-06-05 16:46:12,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58930 transitions. [2021-06-05 16:46:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:12,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:12,359 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:12,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 16:46:12,560 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1382409982, now seen corresponding path program 79 times [2021-06-05 16:46:12,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:12,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682282098] [2021-06-05 16:46:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:12,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:12,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682282098] [2021-06-05 16:46:12,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682282098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:12,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492500966] [2021-06-05 16:46:12,592 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 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 [2021-06-05 16:46:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:12,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492500966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:12,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:12,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:46:12,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528688904] [2021-06-05 16:46:12,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:46:12,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:46:12,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:46:12,684 INFO L87 Difference]: Start difference. First operand 20168 states and 58930 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:12,885 INFO L93 Difference]: Finished difference Result 24551 states and 71034 transitions. [2021-06-05 16:46:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:46:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:12,919 INFO L225 Difference]: With dead ends: 24551 [2021-06-05 16:46:12,919 INFO L226 Difference]: Without dead ends: 24497 [2021-06-05 16:46:12,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24497 states. [2021-06-05 16:46:13,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24497 to 20168. [2021-06-05 16:46:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 2.9216046015768335) internal successors, (58920), 20167 states have internal predecessors, (58920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58920 transitions. [2021-06-05 16:46:13,233 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58920 transitions. Word has length 37 [2021-06-05 16:46:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:13,233 INFO L482 AbstractCegarLoop]: Abstraction has 20168 states and 58920 transitions. [2021-06-05 16:46:13,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58920 transitions. [2021-06-05 16:46:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:13,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:13,255 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:13,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 16:46:13,456 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:13,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1341647984, now seen corresponding path program 80 times [2021-06-05 16:46:13,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:13,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113189785] [2021-06-05 16:46:13,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:13,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:13,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113189785] [2021-06-05 16:46:13,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113189785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:13,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421356849] [2021-06-05 16:46:13,494 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 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 [2021-06-05 16:46:13,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:13,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:13,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421356849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:13,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:13,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:13,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186379608] [2021-06-05 16:46:13,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:13,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:13,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:13,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:13,614 INFO L87 Difference]: Start difference. First operand 20168 states and 58920 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-06-05 16:46:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:13,906 INFO L93 Difference]: Finished difference Result 22851 states and 66117 transitions. [2021-06-05 16:46:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:46:13,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) Word has length 37 [2021-06-05 16:46:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:13,938 INFO L225 Difference]: With dead ends: 22851 [2021-06-05 16:46:13,938 INFO L226 Difference]: Without dead ends: 22851 [2021-06-05 16:46:13,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:46:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22851 states. [2021-06-05 16:46:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22851 to 20512. [2021-06-05 16:46:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20512 states, 20511 states have (on average 2.9201891667885524) internal successors, (59896), 20511 states have internal predecessors, (59896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 59896 transitions. [2021-06-05 16:46:14,244 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 59896 transitions. Word has length 37 [2021-06-05 16:46:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:14,244 INFO L482 AbstractCegarLoop]: Abstraction has 20512 states and 59896 transitions. [2021-06-05 16:46:14,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-06-05 16:46:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 59896 transitions. [2021-06-05 16:46:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:14,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:14,267 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:14,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 16:46:14,467 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash -461813350, now seen corresponding path program 81 times [2021-06-05 16:46:14,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:14,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692942994] [2021-06-05 16:46:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:14,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:14,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692942994] [2021-06-05 16:46:14,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692942994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:14,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442282169] [2021-06-05 16:46:14,499 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 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 [2021-06-05 16:46:14,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:46:14,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:14,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:14,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442282169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:14,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:14,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967032651] [2021-06-05 16:46:14,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:14,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:14,603 INFO L87 Difference]: Start difference. First operand 20512 states and 59896 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:14,962 INFO L93 Difference]: Finished difference Result 25378 states and 73051 transitions. [2021-06-05 16:46:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:46:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:15,003 INFO L225 Difference]: With dead ends: 25378 [2021-06-05 16:46:15,004 INFO L226 Difference]: Without dead ends: 25336 [2021-06-05 16:46:15,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:46:15,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25336 states. [2021-06-05 16:46:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25336 to 21132. [2021-06-05 16:46:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.924707775306422) internal successors, (61802), 21131 states have internal predecessors, (61802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 61802 transitions. [2021-06-05 16:46:15,446 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 61802 transitions. Word has length 37 [2021-06-05 16:46:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:15,446 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 61802 transitions. [2021-06-05 16:46:15,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:15,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 61802 transitions. [2021-06-05 16:46:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:15,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:15,471 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:15,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:15,672 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:15,672 INFO L82 PathProgramCache]: Analyzing trace with hash -664281518, now seen corresponding path program 82 times [2021-06-05 16:46:15,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:15,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400653213] [2021-06-05 16:46:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:15,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:15,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400653213] [2021-06-05 16:46:15,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400653213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:15,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836426308] [2021-06-05 16:46:15,708 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 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 [2021-06-05 16:46:15,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:15,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:15,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:15,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836426308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:15,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:15,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:15,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991874849] [2021-06-05 16:46:15,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:15,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:15,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:15,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:15,819 INFO L87 Difference]: Start difference. First operand 21132 states and 61802 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-06-05 16:46:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:16,296 INFO L93 Difference]: Finished difference Result 26806 states and 77177 transitions. [2021-06-05 16:46:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:46:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) Word has length 37 [2021-06-05 16:46:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:16,339 INFO L225 Difference]: With dead ends: 26806 [2021-06-05 16:46:16,339 INFO L226 Difference]: Without dead ends: 26806 [2021-06-05 16:46:16,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:46:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26806 states. [2021-06-05 16:46:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26806 to 22606. [2021-06-05 16:46:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22606 states, 22605 states have (on average 2.92081397920814) internal successors, (66025), 22605 states have internal predecessors, (66025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22606 states to 22606 states and 66025 transitions. [2021-06-05 16:46:16,717 INFO L78 Accepts]: Start accepts. Automaton has 22606 states and 66025 transitions. Word has length 37 [2021-06-05 16:46:16,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:16,717 INFO L482 AbstractCegarLoop]: Abstraction has 22606 states and 66025 transitions. [2021-06-05 16:46:16,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-06-05 16:46:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 22606 states and 66025 transitions. [2021-06-05 16:46:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:16,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:16,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:16,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 16:46:16,943 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1702207848, now seen corresponding path program 83 times [2021-06-05 16:46:16,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:16,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658475380] [2021-06-05 16:46:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:16,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:16,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658475380] [2021-06-05 16:46:16,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658475380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:16,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590571929] [2021-06-05 16:46:16,975 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 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 [2021-06-05 16:46:17,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:46:17,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:17,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:17,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590571929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:17,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:17,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:17,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751069243] [2021-06-05 16:46:17,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:17,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:17,078 INFO L87 Difference]: Start difference. First operand 22606 states and 66025 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:17,563 INFO L93 Difference]: Finished difference Result 29720 states and 85805 transitions. [2021-06-05 16:46:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:46:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:17,604 INFO L225 Difference]: With dead ends: 29720 [2021-06-05 16:46:17,604 INFO L226 Difference]: Without dead ends: 29672 [2021-06-05 16:46:17,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:46:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29672 states. [2021-06-05 16:46:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29672 to 25600. [2021-06-05 16:46:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25600 states, 25599 states have (on average 2.913160670338685) internal successors, (74574), 25599 states have internal predecessors, (74574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:18,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25600 states to 25600 states and 74574 transitions. [2021-06-05 16:46:18,019 INFO L78 Accepts]: Start accepts. Automaton has 25600 states and 74574 transitions. Word has length 37 [2021-06-05 16:46:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:18,019 INFO L482 AbstractCegarLoop]: Abstraction has 25600 states and 74574 transitions. [2021-06-05 16:46:18,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 25600 states and 74574 transitions. [2021-06-05 16:46:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:18,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:18,046 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:18,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 16:46:18,247 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 369493936, now seen corresponding path program 84 times [2021-06-05 16:46:18,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:18,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912240468] [2021-06-05 16:46:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:18,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:18,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912240468] [2021-06-05 16:46:18,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912240468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:18,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373807079] [2021-06-05 16:46:18,279 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 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 [2021-06-05 16:46:18,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:46:18,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:18,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:18,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:18,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373807079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:18,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:18,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:18,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443458175] [2021-06-05 16:46:18,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:18,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:18,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:18,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:18,384 INFO L87 Difference]: Start difference. First operand 25600 states and 74574 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-06-05 16:46:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:18,918 INFO L93 Difference]: Finished difference Result 31521 states and 90635 transitions. [2021-06-05 16:46:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:46:18,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) Word has length 37 [2021-06-05 16:46:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:18,967 INFO L225 Difference]: With dead ends: 31521 [2021-06-05 16:46:18,967 INFO L226 Difference]: Without dead ends: 31521 [2021-06-05 16:46:18,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:46:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31521 states. [2021-06-05 16:46:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31521 to 27384. [2021-06-05 16:46:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27384 states, 27383 states have (on average 2.9259759704926416) internal successors, (80122), 27383 states have internal predecessors, (80122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27384 states to 27384 states and 80122 transitions. [2021-06-05 16:46:19,463 INFO L78 Accepts]: Start accepts. Automaton has 27384 states and 80122 transitions. Word has length 37 [2021-06-05 16:46:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:19,463 INFO L482 AbstractCegarLoop]: Abstraction has 27384 states and 80122 transitions. [2021-06-05 16:46:19,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 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) [2021-06-05 16:46:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 27384 states and 80122 transitions. [2021-06-05 16:46:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:19,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:19,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:19,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:19,699 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash 158796890, now seen corresponding path program 85 times [2021-06-05 16:46:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:19,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956267611] [2021-06-05 16:46:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:19,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:19,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956267611] [2021-06-05 16:46:19,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956267611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:19,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132263906] [2021-06-05 16:46:19,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:46:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:19,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:20,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132263906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:20,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:20,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:20,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534136339] [2021-06-05 16:46:20,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:20,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:20,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:20,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:20,022 INFO L87 Difference]: Start difference. First operand 27384 states and 80122 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:20,490 INFO L93 Difference]: Finished difference Result 33285 states and 96447 transitions. [2021-06-05 16:46:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:46:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:20,540 INFO L225 Difference]: With dead ends: 33285 [2021-06-05 16:46:20,541 INFO L226 Difference]: Without dead ends: 33267 [2021-06-05 16:46:20,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:46:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33267 states. [2021-06-05 16:46:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33267 to 27954. [2021-06-05 16:46:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27954 states, 27953 states have (on average 2.9269488069259113) internal successors, (81817), 27953 states have internal predecessors, (81817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27954 states to 27954 states and 81817 transitions. [2021-06-05 16:46:21,034 INFO L78 Accepts]: Start accepts. Automaton has 27954 states and 81817 transitions. Word has length 37 [2021-06-05 16:46:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:21,034 INFO L482 AbstractCegarLoop]: Abstraction has 27954 states and 81817 transitions. [2021-06-05 16:46:21,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 27954 states and 81817 transitions. [2021-06-05 16:46:21,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:21,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:21,068 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:21,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:21,269 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash 887548708, now seen corresponding path program 86 times [2021-06-05 16:46:21,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:21,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261211011] [2021-06-05 16:46:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:21,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:21,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261211011] [2021-06-05 16:46:21,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261211011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:21,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695525734] [2021-06-05 16:46:21,306 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 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 [2021-06-05 16:46:21,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:21,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:21,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:21,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695525734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:21,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:21,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:21,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556243466] [2021-06-05 16:46:21,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:21,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:21,407 INFO L87 Difference]: Start difference. First operand 27954 states and 81817 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:21,913 INFO L93 Difference]: Finished difference Result 32376 states and 93008 transitions. [2021-06-05 16:46:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:46:21,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:21,962 INFO L225 Difference]: With dead ends: 32376 [2021-06-05 16:46:21,963 INFO L226 Difference]: Without dead ends: 32369 [2021-06-05 16:46:21,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:46:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32369 states. [2021-06-05 16:46:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32369 to 27014. [2021-06-05 16:46:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27014 states, 27013 states have (on average 2.914559656461704) internal successors, (78731), 27013 states have internal predecessors, (78731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27014 states to 27014 states and 78731 transitions. [2021-06-05 16:46:22,530 INFO L78 Accepts]: Start accepts. Automaton has 27014 states and 78731 transitions. Word has length 37 [2021-06-05 16:46:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:22,530 INFO L482 AbstractCegarLoop]: Abstraction has 27014 states and 78731 transitions. [2021-06-05 16:46:22,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27014 states and 78731 transitions. [2021-06-05 16:46:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:22,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:22,563 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:22,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:22,764 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:22,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:22,764 INFO L82 PathProgramCache]: Analyzing trace with hash 510577554, now seen corresponding path program 87 times [2021-06-05 16:46:22,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:22,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775698938] [2021-06-05 16:46:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:22,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:22,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775698938] [2021-06-05 16:46:22,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775698938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:22,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412198252] [2021-06-05 16:46:22,796 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 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 [2021-06-05 16:46:22,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:46:22,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:22,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:22,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:22,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412198252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:22,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:22,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:46:22,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917292303] [2021-06-05 16:46:22,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:22,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:22,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:22,908 INFO L87 Difference]: Start difference. First operand 27014 states and 78731 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:23,280 INFO L93 Difference]: Finished difference Result 29628 states and 85439 transitions. [2021-06-05 16:46:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:46:23,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:23,324 INFO L225 Difference]: With dead ends: 29628 [2021-06-05 16:46:23,324 INFO L226 Difference]: Without dead ends: 29614 [2021-06-05 16:46:23,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:46:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29614 states. [2021-06-05 16:46:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29614 to 23956. [2021-06-05 16:46:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23956 states, 23955 states have (on average 2.914631600918389) internal successors, (69820), 23955 states have internal predecessors, (69820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23956 states to 23956 states and 69820 transitions. [2021-06-05 16:46:23,742 INFO L78 Accepts]: Start accepts. Automaton has 23956 states and 69820 transitions. Word has length 37 [2021-06-05 16:46:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:23,742 INFO L482 AbstractCegarLoop]: Abstraction has 23956 states and 69820 transitions. [2021-06-05 16:46:23,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23956 states and 69820 transitions. [2021-06-05 16:46:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:23,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:23,767 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:23,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 16:46:23,968 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1704477878, now seen corresponding path program 88 times [2021-06-05 16:46:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:23,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831501305] [2021-06-05 16:46:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:24,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831501305] [2021-06-05 16:46:24,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831501305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114525106] [2021-06-05 16:46:24,037 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 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 [2021-06-05 16:46:24,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:24,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:24,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:24,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:24,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114525106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:24,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:24,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:46:24,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473442063] [2021-06-05 16:46:24,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:46:24,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:46:24,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:46:24,195 INFO L87 Difference]: Start difference. First operand 23956 states and 69820 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:24,710 INFO L93 Difference]: Finished difference Result 28263 states and 81286 transitions. [2021-06-05 16:46:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:46:24,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:24,756 INFO L225 Difference]: With dead ends: 28263 [2021-06-05 16:46:24,756 INFO L226 Difference]: Without dead ends: 28251 [2021-06-05 16:46:24,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:46:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28251 states. [2021-06-05 16:46:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28251 to 24282. [2021-06-05 16:46:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24282 states, 24281 states have (on average 2.9153247395082573) internal successors, (70787), 24281 states have internal predecessors, (70787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24282 states to 24282 states and 70787 transitions. [2021-06-05 16:46:25,279 INFO L78 Accepts]: Start accepts. Automaton has 24282 states and 70787 transitions. Word has length 37 [2021-06-05 16:46:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:25,279 INFO L482 AbstractCegarLoop]: Abstraction has 24282 states and 70787 transitions. [2021-06-05 16:46:25,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24282 states and 70787 transitions. [2021-06-05 16:46:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:25,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:25,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:25,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 16:46:25,507 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash 606853100, now seen corresponding path program 89 times [2021-06-05 16:46:25,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:25,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610392937] [2021-06-05 16:46:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:25,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:25,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610392937] [2021-06-05 16:46:25,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610392937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:25,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466987356] [2021-06-05 16:46:25,539 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 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 [2021-06-05 16:46:25,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:46:25,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:25,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:25,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466987356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:25,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:25,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:46:25,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740944578] [2021-06-05 16:46:25,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:25,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:25,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:25,654 INFO L87 Difference]: Start difference. First operand 24282 states and 70787 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:26,102 INFO L93 Difference]: Finished difference Result 30400 states and 87330 transitions. [2021-06-05 16:46:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:46:26,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:26,154 INFO L225 Difference]: With dead ends: 30400 [2021-06-05 16:46:26,154 INFO L226 Difference]: Without dead ends: 30394 [2021-06-05 16:46:26,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:46:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-06-05 16:46:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 24292. [2021-06-05 16:46:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24292 states, 24291 states have (on average 2.915647770779301) internal successors, (70824), 24291 states have internal predecessors, (70824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24292 states to 24292 states and 70824 transitions. [2021-06-05 16:46:26,618 INFO L78 Accepts]: Start accepts. Automaton has 24292 states and 70824 transitions. Word has length 37 [2021-06-05 16:46:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:26,618 INFO L482 AbstractCegarLoop]: Abstraction has 24292 states and 70824 transitions. [2021-06-05 16:46:26,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 24292 states and 70824 transitions. [2021-06-05 16:46:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:26,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:26,647 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:26,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 16:46:26,847 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1506148470, now seen corresponding path program 90 times [2021-06-05 16:46:26,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:26,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832148126] [2021-06-05 16:46:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:26,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:26,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832148126] [2021-06-05 16:46:26,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832148126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:26,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385632890] [2021-06-05 16:46:26,896 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 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 [2021-06-05 16:46:26,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:46:26,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:26,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:27,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385632890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:27,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:27,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:46:27,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927630036] [2021-06-05 16:46:27,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:27,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:27,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:27,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:27,008 INFO L87 Difference]: Start difference. First operand 24292 states and 70824 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:27,528 INFO L93 Difference]: Finished difference Result 31964 states and 91804 transitions. [2021-06-05 16:46:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:46:27,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:27,578 INFO L225 Difference]: With dead ends: 31964 [2021-06-05 16:46:27,579 INFO L226 Difference]: Without dead ends: 31964 [2021-06-05 16:46:27,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:46:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31964 states. [2021-06-05 16:46:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31964 to 26278. [2021-06-05 16:46:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 2.919244967081478) internal successors, (76709), 26277 states have internal predecessors, (76709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 76709 transitions. [2021-06-05 16:46:28,036 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 76709 transitions. Word has length 37 [2021-06-05 16:46:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:28,036 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 76709 transitions. [2021-06-05 16:46:28,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 76709 transitions. [2021-06-05 16:46:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:28,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:28,068 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:28,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 16:46:28,269 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1647232088, now seen corresponding path program 91 times [2021-06-05 16:46:28,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:28,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903570938] [2021-06-05 16:46:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:28,418 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 16:46:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:46:28,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:28,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903570938] [2021-06-05 16:46:28,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903570938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:28,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253108086] [2021-06-05 16:46:28,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:46:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:28,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253108086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:28,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:28,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:46:28,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869659568] [2021-06-05 16:46:28,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:28,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:28,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:28,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:28,556 INFO L87 Difference]: Start difference. First operand 26278 states and 76709 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:28,984 INFO L93 Difference]: Finished difference Result 31151 states and 89602 transitions. [2021-06-05 16:46:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:46:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:29,035 INFO L225 Difference]: With dead ends: 31151 [2021-06-05 16:46:29,035 INFO L226 Difference]: Without dead ends: 31130 [2021-06-05 16:46:29,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 380.7ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:46:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31130 states. [2021-06-05 16:46:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31130 to 23206. [2021-06-05 16:46:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23206 states, 23205 states have (on average 2.908554190907132) internal successors, (67493), 23205 states have internal predecessors, (67493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23206 states to 23206 states and 67493 transitions. [2021-06-05 16:46:29,444 INFO L78 Accepts]: Start accepts. Automaton has 23206 states and 67493 transitions. Word has length 37 [2021-06-05 16:46:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:29,444 INFO L482 AbstractCegarLoop]: Abstraction has 23206 states and 67493 transitions. [2021-06-05 16:46:29,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 23206 states and 67493 transitions. [2021-06-05 16:46:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:29,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:29,469 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:29,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:29,670 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1731630862, now seen corresponding path program 92 times [2021-06-05 16:46:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:29,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765405382] [2021-06-05 16:46:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:29,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765405382] [2021-06-05 16:46:29,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765405382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122985259] [2021-06-05 16:46:29,703 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 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 [2021-06-05 16:46:29,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:29,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:29,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122985259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:29,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:29,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:46:29,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291066148] [2021-06-05 16:46:29,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:46:29,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:29,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:46:29,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:46:29,813 INFO L87 Difference]: Start difference. First operand 23206 states and 67493 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:30,168 INFO L93 Difference]: Finished difference Result 29544 states and 84782 transitions. [2021-06-05 16:46:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:46:30,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:30,213 INFO L225 Difference]: With dead ends: 29544 [2021-06-05 16:46:30,214 INFO L226 Difference]: Without dead ends: 29488 [2021-06-05 16:46:30,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:46:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29488 states. [2021-06-05 16:46:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29488 to 24042. [2021-06-05 16:46:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24042 states, 24041 states have (on average 2.9141466661120585) internal successors, (70059), 24041 states have internal predecessors, (70059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24042 states to 24042 states and 70059 transitions. [2021-06-05 16:46:30,595 INFO L78 Accepts]: Start accepts. Automaton has 24042 states and 70059 transitions. Word has length 37 [2021-06-05 16:46:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:30,595 INFO L482 AbstractCegarLoop]: Abstraction has 24042 states and 70059 transitions. [2021-06-05 16:46:30,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 24042 states and 70059 transitions. [2021-06-05 16:46:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:30,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:30,620 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:30,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 16:46:30,821 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1163931468, now seen corresponding path program 93 times [2021-06-05 16:46:30,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:30,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397896845] [2021-06-05 16:46:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:30,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:30,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397896845] [2021-06-05 16:46:30,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397896845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:30,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999767778] [2021-06-05 16:46:30,861 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 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 [2021-06-05 16:46:30,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:46:30,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:30,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:30,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999767778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:30,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:30,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:46:30,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923441396] [2021-06-05 16:46:30,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:46:30,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:30,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:46:30,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:46:30,981 INFO L87 Difference]: Start difference. First operand 24042 states and 70059 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:31,378 INFO L93 Difference]: Finished difference Result 30061 states and 86344 transitions. [2021-06-05 16:46:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:46:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:31,424 INFO L225 Difference]: With dead ends: 30061 [2021-06-05 16:46:31,424 INFO L226 Difference]: Without dead ends: 30049 [2021-06-05 16:46:31,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:46:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30049 states. [2021-06-05 16:46:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30049 to 25534. [2021-06-05 16:46:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25534 states, 25533 states have (on average 2.906708964868993) internal successors, (74217), 25533 states have internal predecessors, (74217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 74217 transitions. [2021-06-05 16:46:31,902 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 74217 transitions. Word has length 37 [2021-06-05 16:46:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:31,902 INFO L482 AbstractCegarLoop]: Abstraction has 25534 states and 74217 transitions. [2021-06-05 16:46:31,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 74217 transitions. [2021-06-05 16:46:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:31,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:31,929 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:32,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 16:46:32,129 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1502315474, now seen corresponding path program 94 times [2021-06-05 16:46:32,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:32,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431832863] [2021-06-05 16:46:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:32,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:32,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431832863] [2021-06-05 16:46:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431832863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:32,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709975244] [2021-06-05 16:46:32,155 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 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 [2021-06-05 16:46:32,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:32,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:32,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:32,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:32,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709975244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:32,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:32,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:46:32,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964614471] [2021-06-05 16:46:32,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:46:32,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:32,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:46:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:46:32,268 INFO L87 Difference]: Start difference. First operand 25534 states and 74217 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:32,732 INFO L93 Difference]: Finished difference Result 36194 states and 103786 transitions. [2021-06-05 16:46:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:46:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:32,790 INFO L225 Difference]: With dead ends: 36194 [2021-06-05 16:46:32,790 INFO L226 Difference]: Without dead ends: 36188 [2021-06-05 16:46:32,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:46:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36188 states. [2021-06-05 16:46:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36188 to 29604. [2021-06-05 16:46:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29604 states, 29603 states have (on average 2.912745329865216) internal successors, (86226), 29603 states have internal predecessors, (86226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29604 states to 29604 states and 86226 transitions. [2021-06-05 16:46:33,291 INFO L78 Accepts]: Start accepts. Automaton has 29604 states and 86226 transitions. Word has length 37 [2021-06-05 16:46:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:33,291 INFO L482 AbstractCegarLoop]: Abstraction has 29604 states and 86226 transitions. [2021-06-05 16:46:33,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 29604 states and 86226 transitions. [2021-06-05 16:46:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:33,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:33,327 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:33,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:33,527 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1313090188, now seen corresponding path program 95 times [2021-06-05 16:46:33,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:33,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254040357] [2021-06-05 16:46:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:33,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:33,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254040357] [2021-06-05 16:46:33,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254040357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:33,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839605549] [2021-06-05 16:46:33,553 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 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 [2021-06-05 16:46:33,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:46:33,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:33,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:33,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839605549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:33,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:33,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 16:46:33,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568142005] [2021-06-05 16:46:33,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:33,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:33,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:33,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:33,662 INFO L87 Difference]: Start difference. First operand 29604 states and 86226 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:34,170 INFO L93 Difference]: Finished difference Result 41937 states and 120606 transitions. [2021-06-05 16:46:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:46:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:34,237 INFO L225 Difference]: With dead ends: 41937 [2021-06-05 16:46:34,238 INFO L226 Difference]: Without dead ends: 41937 [2021-06-05 16:46:34,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:46:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41937 states. [2021-06-05 16:46:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41937 to 35832. [2021-06-05 16:46:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35832 states, 35831 states have (on average 2.9105523150344674) internal successors, (104288), 35831 states have internal predecessors, (104288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35832 states to 35832 states and 104288 transitions. [2021-06-05 16:46:34,994 INFO L78 Accepts]: Start accepts. Automaton has 35832 states and 104288 transitions. Word has length 37 [2021-06-05 16:46:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:34,994 INFO L482 AbstractCegarLoop]: Abstraction has 35832 states and 104288 transitions. [2021-06-05 16:46:34,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 35832 states and 104288 transitions. [2021-06-05 16:46:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:35,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:35,039 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:35,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:35,240 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:35,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1172006570, now seen corresponding path program 96 times [2021-06-05 16:46:35,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:35,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339908137] [2021-06-05 16:46:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:46:35,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:35,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339908137] [2021-06-05 16:46:35,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339908137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:35,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248929109] [2021-06-05 16:46:35,263 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 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 [2021-06-05 16:46:35,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:46:35,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:35,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:35,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:35,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248929109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:35,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:35,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 16:46:35,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637689118] [2021-06-05 16:46:35,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:46:35,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:35,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:46:35,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:46:35,370 INFO L87 Difference]: Start difference. First operand 35832 states and 104288 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:35,860 INFO L93 Difference]: Finished difference Result 41300 states and 118909 transitions. [2021-06-05 16:46:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:46:35,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:35,925 INFO L225 Difference]: With dead ends: 41300 [2021-06-05 16:46:35,925 INFO L226 Difference]: Without dead ends: 41286 [2021-06-05 16:46:35,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:46:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2021-06-05 16:46:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 35320. [2021-06-05 16:46:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35320 states, 35319 states have (on average 2.9060845437300036) internal successors, (102640), 35319 states have internal predecessors, (102640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35320 states to 35320 states and 102640 transitions. [2021-06-05 16:46:36,532 INFO L78 Accepts]: Start accepts. Automaton has 35320 states and 102640 transitions. Word has length 37 [2021-06-05 16:46:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:36,533 INFO L482 AbstractCegarLoop]: Abstraction has 35320 states and 102640 transitions. [2021-06-05 16:46:36,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 35320 states and 102640 transitions. [2021-06-05 16:46:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:36,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:36,574 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:36,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:36,775 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:36,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1087607796, now seen corresponding path program 97 times [2021-06-05 16:46:36,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:36,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830672452] [2021-06-05 16:46:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:46:36,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:36,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830672452] [2021-06-05 16:46:36,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830672452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:36,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354836661] [2021-06-05 16:46:36,806 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 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 [2021-06-05 16:46:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:36,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:36,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:36,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354836661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:36,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:36,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:46:36,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345973135] [2021-06-05 16:46:36,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:46:36,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:46:36,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:46:36,947 INFO L87 Difference]: Start difference. First operand 35320 states and 102640 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:37,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:37,448 INFO L93 Difference]: Finished difference Result 41805 states and 120268 transitions. [2021-06-05 16:46:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:46:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:37,513 INFO L225 Difference]: With dead ends: 41805 [2021-06-05 16:46:37,513 INFO L226 Difference]: Without dead ends: 41749 [2021-06-05 16:46:37,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:46:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41749 states. [2021-06-05 16:46:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41749 to 36324. [2021-06-05 16:46:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36324 states, 36323 states have (on average 2.9055970046526993) internal successors, (105540), 36323 states have internal predecessors, (105540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 105540 transitions. [2021-06-05 16:46:38,276 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 105540 transitions. Word has length 37 [2021-06-05 16:46:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:38,276 INFO L482 AbstractCegarLoop]: Abstraction has 36324 states and 105540 transitions. [2021-06-05 16:46:38,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 105540 transitions. [2021-06-05 16:46:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 16:46:38,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:38,320 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:38,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:38,521 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash 552429714, now seen corresponding path program 98 times [2021-06-05 16:46:38,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:38,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786295215] [2021-06-05 16:46:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:38,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786295215] [2021-06-05 16:46:38,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786295215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145654921] [2021-06-05 16:46:38,555 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 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 [2021-06-05 16:46:38,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:38,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:46:38,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:38,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145654921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:38,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:38,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:46:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932899196] [2021-06-05 16:46:38,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:46:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:46:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:46:38,696 INFO L87 Difference]: Start difference. First operand 36324 states and 105540 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:39,133 INFO L93 Difference]: Finished difference Result 42907 states and 123545 transitions. [2021-06-05 16:46:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:46:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 16:46:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:39,207 INFO L225 Difference]: With dead ends: 42907 [2021-06-05 16:46:39,207 INFO L226 Difference]: Without dead ends: 42809 [2021-06-05 16:46:39,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:46:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42809 states. [2021-06-05 16:46:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42809 to 37654. [2021-06-05 16:46:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37654 states, 37653 states have (on average 2.904708788144371) internal successors, (109371), 37653 states have internal predecessors, (109371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37654 states to 37654 states and 109371 transitions. [2021-06-05 16:46:40,278 INFO L78 Accepts]: Start accepts. Automaton has 37654 states and 109371 transitions. Word has length 37 [2021-06-05 16:46:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:40,278 INFO L482 AbstractCegarLoop]: Abstraction has 37654 states and 109371 transitions. [2021-06-05 16:46:40,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37654 states and 109371 transitions. [2021-06-05 16:46:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:46:40,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:40,326 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:40,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:40,527 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:40,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1312568382, now seen corresponding path program 99 times [2021-06-05 16:46:40,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:40,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059822027] [2021-06-05 16:46:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:40,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:40,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059822027] [2021-06-05 16:46:40,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059822027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:40,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892526342] [2021-06-05 16:46:40,677 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 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 [2021-06-05 16:46:40,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:46:40,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:40,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:46:40,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:40,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892526342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:40,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:40,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 16:46:40,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522433747] [2021-06-05 16:46:40,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:46:40,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:40,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:46:40,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:46:40,976 INFO L87 Difference]: Start difference. First operand 37654 states and 109371 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:41,369 INFO L93 Difference]: Finished difference Result 53826 states and 156188 transitions. [2021-06-05 16:46:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:46:41,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:46:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:41,473 INFO L225 Difference]: With dead ends: 53826 [2021-06-05 16:46:41,473 INFO L226 Difference]: Without dead ends: 53788 [2021-06-05 16:46:41,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:46:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53788 states. [2021-06-05 16:46:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53788 to 37682. [2021-06-05 16:46:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37682 states, 37681 states have (on average 2.90414267137284) internal successors, (109431), 37681 states have internal predecessors, (109431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37682 states to 37682 states and 109431 transitions. [2021-06-05 16:46:42,227 INFO L78 Accepts]: Start accepts. Automaton has 37682 states and 109431 transitions. Word has length 40 [2021-06-05 16:46:42,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:42,228 INFO L482 AbstractCegarLoop]: Abstraction has 37682 states and 109431 transitions. [2021-06-05 16:46:42,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand 37682 states and 109431 transitions. [2021-06-05 16:46:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:46:42,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:42,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:42,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 16:46:42,640 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash 920480774, now seen corresponding path program 100 times [2021-06-05 16:46:42,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:42,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210065809] [2021-06-05 16:46:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:42,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210065809] [2021-06-05 16:46:42,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210065809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:42,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022630470] [2021-06-05 16:46:42,761 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 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 [2021-06-05 16:46:42,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:42,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:46:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:42,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022630470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:42,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:42,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 16:46:42,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246308379] [2021-06-05 16:46:42,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:46:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:46:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:42,962 INFO L87 Difference]: Start difference. First operand 37682 states and 109431 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:43,570 INFO L93 Difference]: Finished difference Result 61487 states and 178572 transitions. [2021-06-05 16:46:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:46:43,570 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:46:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:43,673 INFO L225 Difference]: With dead ends: 61487 [2021-06-05 16:46:43,673 INFO L226 Difference]: Without dead ends: 61405 [2021-06-05 16:46:43,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:46:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61405 states. [2021-06-05 16:46:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61405 to 44129. [2021-06-05 16:46:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44129 states, 44128 states have (on average 2.9096718636693257) internal successors, (128398), 44128 states have internal predecessors, (128398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:44,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44129 states to 44129 states and 128398 transitions. [2021-06-05 16:46:44,696 INFO L78 Accepts]: Start accepts. Automaton has 44129 states and 128398 transitions. Word has length 40 [2021-06-05 16:46:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:44,696 INFO L482 AbstractCegarLoop]: Abstraction has 44129 states and 128398 transitions. [2021-06-05 16:46:44,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 44129 states and 128398 transitions. [2021-06-05 16:46:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:46:44,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:44,753 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:44,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 16:46:44,954 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:44,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1516586690, now seen corresponding path program 101 times [2021-06-05 16:46:44,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:44,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068743629] [2021-06-05 16:46:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:45,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:45,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068743629] [2021-06-05 16:46:45,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068743629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:45,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525878133] [2021-06-05 16:46:45,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:46:45,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:46:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:46:45,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:45,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525878133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:45,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:45,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 16:46:45,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474860646] [2021-06-05 16:46:45,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:46:45,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:46:45,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:45,301 INFO L87 Difference]: Start difference. First operand 44129 states and 128398 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:46,061 INFO L93 Difference]: Finished difference Result 61471 states and 178534 transitions. [2021-06-05 16:46:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:46:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:46:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:46,173 INFO L225 Difference]: With dead ends: 61471 [2021-06-05 16:46:46,174 INFO L226 Difference]: Without dead ends: 61359 [2021-06-05 16:46:46,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:46:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61359 states. [2021-06-05 16:46:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61359 to 42975. [2021-06-05 16:46:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42975 states, 42974 states have (on average 2.9057336994461767) internal successors, (124871), 42974 states have internal predecessors, (124871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42975 states to 42975 states and 124871 transitions. [2021-06-05 16:46:47,109 INFO L78 Accepts]: Start accepts. Automaton has 42975 states and 124871 transitions. Word has length 40 [2021-06-05 16:46:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:47,109 INFO L482 AbstractCegarLoop]: Abstraction has 42975 states and 124871 transitions. [2021-06-05 16:46:47,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 42975 states and 124871 transitions. [2021-06-05 16:46:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:46:47,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:47,353 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:47,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 16:46:47,556 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:47,556 INFO L82 PathProgramCache]: Analyzing trace with hash 459063162, now seen corresponding path program 102 times [2021-06-05 16:46:47,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:47,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320450052] [2021-06-05 16:46:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:47,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:47,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320450052] [2021-06-05 16:46:47,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320450052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:47,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446401354] [2021-06-05 16:46:47,695 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 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 [2021-06-05 16:46:47,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:46:47,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:46:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:47,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446401354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:47,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:47,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 16:46:47,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28502283] [2021-06-05 16:46:47,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:46:47,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:47,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:46:47,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:46:47,951 INFO L87 Difference]: Start difference. First operand 42975 states and 124871 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:48,816 INFO L93 Difference]: Finished difference Result 61721 states and 178788 transitions. [2021-06-05 16:46:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:46:48,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:46:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:49,100 INFO L225 Difference]: With dead ends: 61721 [2021-06-05 16:46:49,100 INFO L226 Difference]: Without dead ends: 61604 [2021-06-05 16:46:49,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 559.4ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:46:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61604 states. [2021-06-05 16:46:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61604 to 43605. [2021-06-05 16:46:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43605 states, 43604 states have (on average 2.906338867993762) internal successors, (126728), 43604 states have internal predecessors, (126728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43605 states to 43605 states and 126728 transitions. [2021-06-05 16:46:49,911 INFO L78 Accepts]: Start accepts. Automaton has 43605 states and 126728 transitions. Word has length 40 [2021-06-05 16:46:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:49,911 INFO L482 AbstractCegarLoop]: Abstraction has 43605 states and 126728 transitions. [2021-06-05 16:46:49,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43605 states and 126728 transitions. [2021-06-05 16:46:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:46:49,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:49,963 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:50,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:50,164 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1637637984, now seen corresponding path program 103 times [2021-06-05 16:46:50,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:50,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063356587] [2021-06-05 16:46:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:50,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:50,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063356587] [2021-06-05 16:46:50,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063356587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:50,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674269594] [2021-06-05 16:46:50,302 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 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 [2021-06-05 16:46:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:46:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:50,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674269594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:50,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:50,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 16:46:50,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998438817] [2021-06-05 16:46:50,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:46:50,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:50,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:46:50,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:50,490 INFO L87 Difference]: Start difference. First operand 43605 states and 126728 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:51,109 INFO L93 Difference]: Finished difference Result 61267 states and 177882 transitions. [2021-06-05 16:46:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:46:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:46:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:51,213 INFO L225 Difference]: With dead ends: 61267 [2021-06-05 16:46:51,213 INFO L226 Difference]: Without dead ends: 61191 [2021-06-05 16:46:51,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:46:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61191 states. [2021-06-05 16:46:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61191 to 44261. [2021-06-05 16:46:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44261 states, 44260 states have (on average 2.9074107546317216) internal successors, (128682), 44260 states have internal predecessors, (128682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44261 states to 44261 states and 128682 transitions. [2021-06-05 16:46:52,199 INFO L78 Accepts]: Start accepts. Automaton has 44261 states and 128682 transitions. Word has length 40 [2021-06-05 16:46:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:52,199 INFO L482 AbstractCegarLoop]: Abstraction has 44261 states and 128682 transitions. [2021-06-05 16:46:52,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 44261 states and 128682 transitions. [2021-06-05 16:46:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:46:52,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:52,251 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:52,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:52,451 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:52,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1202515386, now seen corresponding path program 104 times [2021-06-05 16:46:52,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:52,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807523178] [2021-06-05 16:46:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:52,714 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 16:46:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:52,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807523178] [2021-06-05 16:46:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807523178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023639040] [2021-06-05 16:46:52,845 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 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 [2021-06-05 16:46:52,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:52,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:46:52,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:53,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023639040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:53,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:53,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 16:46:53,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494991326] [2021-06-05 16:46:53,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:46:53,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:53,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:46:53,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:46:53,164 INFO L87 Difference]: Start difference. First operand 44261 states and 128682 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:53,834 INFO L93 Difference]: Finished difference Result 61530 states and 178419 transitions. [2021-06-05 16:46:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:46:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:46:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:53,940 INFO L225 Difference]: With dead ends: 61530 [2021-06-05 16:46:53,940 INFO L226 Difference]: Without dead ends: 61492 [2021-06-05 16:46:53,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:46:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61492 states. [2021-06-05 16:46:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61492 to 44283. [2021-06-05 16:46:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44283 states, 44282 states have (on average 2.9074341718982883) internal successors, (128747), 44282 states have internal predecessors, (128747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44283 states to 44283 states and 128747 transitions. [2021-06-05 16:46:55,011 INFO L78 Accepts]: Start accepts. Automaton has 44283 states and 128747 transitions. Word has length 40 [2021-06-05 16:46:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:55,012 INFO L482 AbstractCegarLoop]: Abstraction has 44283 states and 128747 transitions. [2021-06-05 16:46:55,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 44283 states and 128747 transitions. [2021-06-05 16:46:55,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:46:55,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:55,062 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:55,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:55,262 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1556734402, now seen corresponding path program 105 times [2021-06-05 16:46:55,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:55,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832861996] [2021-06-05 16:46:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:55,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:55,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832861996] [2021-06-05 16:46:55,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832861996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:55,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871153229] [2021-06-05 16:46:55,401 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 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 [2021-06-05 16:46:55,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:46:55,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:46:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:55,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871153229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:55,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:55,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 16:46:55,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390954801] [2021-06-05 16:46:55,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:46:55,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:55,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:46:55,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:46:55,650 INFO L87 Difference]: Start difference. First operand 44283 states and 128747 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:56,313 INFO L93 Difference]: Finished difference Result 56563 states and 164364 transitions. [2021-06-05 16:46:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:46:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:46:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:56,599 INFO L225 Difference]: With dead ends: 56563 [2021-06-05 16:46:56,599 INFO L226 Difference]: Without dead ends: 56457 [2021-06-05 16:46:56,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 399.4ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:46:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56457 states. [2021-06-05 16:46:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56457 to 52795. [2021-06-05 16:46:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52795 states, 52794 states have (on average 2.919252187748608) internal successors, (154119), 52794 states have internal predecessors, (154119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 154119 transitions. [2021-06-05 16:46:57,663 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 154119 transitions. Word has length 40 [2021-06-05 16:46:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:57,663 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 154119 transitions. [2021-06-05 16:46:57,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 154119 transitions. [2021-06-05 16:46:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:46:57,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:57,736 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:57,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 16:46:57,936 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:57,936 INFO L82 PathProgramCache]: Analyzing trace with hash -280230338, now seen corresponding path program 106 times [2021-06-05 16:46:57,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:57,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655275858] [2021-06-05 16:46:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:58,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:58,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655275858] [2021-06-05 16:46:58,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655275858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:58,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459534295] [2021-06-05 16:46:58,041 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 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 [2021-06-05 16:46:58,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:46:58,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:58,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:46:58,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:58,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459534295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:58,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:58,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 16:46:58,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141896799] [2021-06-05 16:46:58,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:46:58,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:46:58,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:58,249 INFO L87 Difference]: Start difference. First operand 52795 states and 154119 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:58,770 INFO L93 Difference]: Finished difference Result 57562 states and 167245 transitions. [2021-06-05 16:46:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:46:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:46:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:59,116 INFO L225 Difference]: With dead ends: 57562 [2021-06-05 16:46:59,116 INFO L226 Difference]: Without dead ends: 57438 [2021-06-05 16:46:59,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:46:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57438 states. [2021-06-05 16:46:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57438 to 51595. [2021-06-05 16:46:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51595 states, 51594 states have (on average 2.9149319688335855) internal successors, (150393), 51594 states have internal predecessors, (150393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51595 states to 51595 states and 150393 transitions. [2021-06-05 16:47:00,102 INFO L78 Accepts]: Start accepts. Automaton has 51595 states and 150393 transitions. Word has length 40 [2021-06-05 16:47:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:00,102 INFO L482 AbstractCegarLoop]: Abstraction has 51595 states and 150393 transitions. [2021-06-05 16:47:00,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 51595 states and 150393 transitions. [2021-06-05 16:47:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:00,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:00,172 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:00,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:00,373 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:00,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:00,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1270374918, now seen corresponding path program 107 times [2021-06-05 16:47:00,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:00,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994202678] [2021-06-05 16:47:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:00,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994202678] [2021-06-05 16:47:00,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994202678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306459724] [2021-06-05 16:47:00,476 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 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 [2021-06-05 16:47:00,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:47:00,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:00,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:00,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306459724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:00,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:00,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 16:47:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740932036] [2021-06-05 16:47:00,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:00,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:00,677 INFO L87 Difference]: Start difference. First operand 51595 states and 150393 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:01,139 INFO L93 Difference]: Finished difference Result 55561 states and 161164 transitions. [2021-06-05 16:47:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:47:01,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:01,231 INFO L225 Difference]: With dead ends: 55561 [2021-06-05 16:47:01,231 INFO L226 Difference]: Without dead ends: 55437 [2021-06-05 16:47:01,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:47:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55437 states. [2021-06-05 16:47:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55437 to 50887. [2021-06-05 16:47:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50887 states, 50886 states have (on average 2.9142986283064105) internal successors, (148297), 50886 states have internal predecessors, (148297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50887 states to 50887 states and 148297 transitions. [2021-06-05 16:47:02,611 INFO L78 Accepts]: Start accepts. Automaton has 50887 states and 148297 transitions. Word has length 40 [2021-06-05 16:47:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:02,611 INFO L482 AbstractCegarLoop]: Abstraction has 50887 states and 148297 transitions. [2021-06-05 16:47:02,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand 50887 states and 148297 transitions. [2021-06-05 16:47:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:02,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:02,671 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:02,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 16:47:02,872 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash 626264254, now seen corresponding path program 108 times [2021-06-05 16:47:02,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:02,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918741272] [2021-06-05 16:47:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:03,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918741272] [2021-06-05 16:47:03,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918741272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:03,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455005953] [2021-06-05 16:47:03,001 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 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 [2021-06-05 16:47:03,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:47:03,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:03,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455005953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:03,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:03,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 16:47:03,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750008300] [2021-06-05 16:47:03,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:03,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:03,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:03,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:03,207 INFO L87 Difference]: Start difference. First operand 50887 states and 148297 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:03,598 INFO L93 Difference]: Finished difference Result 54386 states and 157811 transitions. [2021-06-05 16:47:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:47:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:03,690 INFO L225 Difference]: With dead ends: 54386 [2021-06-05 16:47:03,691 INFO L226 Difference]: Without dead ends: 54310 [2021-06-05 16:47:03,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:47:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54310 states. [2021-06-05 16:47:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54310 to 50291. [2021-06-05 16:47:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50291 states, 50290 states have (on average 2.913481805527938) internal successors, (146519), 50290 states have internal predecessors, (146519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50291 states to 50291 states and 146519 transitions. [2021-06-05 16:47:04,681 INFO L78 Accepts]: Start accepts. Automaton has 50291 states and 146519 transitions. Word has length 40 [2021-06-05 16:47:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:04,681 INFO L482 AbstractCegarLoop]: Abstraction has 50291 states and 146519 transitions. [2021-06-05 16:47:04,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 50291 states and 146519 transitions. [2021-06-05 16:47:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:04,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:04,740 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:04,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:04,940 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1839351558, now seen corresponding path program 109 times [2021-06-05 16:47:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:04,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159217298] [2021-06-05 16:47:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:05,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:05,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159217298] [2021-06-05 16:47:05,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159217298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:05,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858282100] [2021-06-05 16:47:05,284 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 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 [2021-06-05 16:47:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:05,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:05,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:05,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858282100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:05,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:05,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 16:47:05,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164766972] [2021-06-05 16:47:05,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:47:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:47:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:05,509 INFO L87 Difference]: Start difference. First operand 50291 states and 146519 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:05,900 INFO L93 Difference]: Finished difference Result 54366 states and 157749 transitions. [2021-06-05 16:47:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:47:05,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:05,993 INFO L225 Difference]: With dead ends: 54366 [2021-06-05 16:47:05,993 INFO L226 Difference]: Without dead ends: 54290 [2021-06-05 16:47:05,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:47:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54290 states. [2021-06-05 16:47:06,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54290 to 50899. [2021-06-05 16:47:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50899 states, 50898 states have (on average 2.913945538135094) internal successors, (148314), 50898 states have internal predecessors, (148314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50899 states to 50899 states and 148314 transitions. [2021-06-05 16:47:07,032 INFO L78 Accepts]: Start accepts. Automaton has 50899 states and 148314 transitions. Word has length 40 [2021-06-05 16:47:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:07,032 INFO L482 AbstractCegarLoop]: Abstraction has 50899 states and 148314 transitions. [2021-06-05 16:47:07,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 50899 states and 148314 transitions. [2021-06-05 16:47:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:07,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:07,095 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:07,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:07,297 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash 665879302, now seen corresponding path program 110 times [2021-06-05 16:47:07,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:07,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049870863] [2021-06-05 16:47:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:07,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:07,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049870863] [2021-06-05 16:47:07,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049870863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:07,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470965153] [2021-06-05 16:47:07,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:47:07,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:47:07,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:47:07,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:07,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470965153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:07,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:07,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 16:47:07,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609149668] [2021-06-05 16:47:07,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:47:07,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:07,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:47:07,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:47:07,708 INFO L87 Difference]: Start difference. First operand 50899 states and 148314 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:08,647 INFO L93 Difference]: Finished difference Result 57635 states and 168077 transitions. [2021-06-05 16:47:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:47:08,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:08,752 INFO L225 Difference]: With dead ends: 57635 [2021-06-05 16:47:08,752 INFO L226 Difference]: Without dead ends: 57513 [2021-06-05 16:47:08,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 551.3ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:47:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57513 states. [2021-06-05 16:47:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57513 to 56897. [2021-06-05 16:47:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56897 states, 56896 states have (on average 2.92415987064117) internal successors, (166373), 56896 states have internal predecessors, (166373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56897 states to 56897 states and 166373 transitions. [2021-06-05 16:47:09,876 INFO L78 Accepts]: Start accepts. Automaton has 56897 states and 166373 transitions. Word has length 40 [2021-06-05 16:47:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:09,876 INFO L482 AbstractCegarLoop]: Abstraction has 56897 states and 166373 transitions. [2021-06-05 16:47:09,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 56897 states and 166373 transitions. [2021-06-05 16:47:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:09,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:09,957 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:10,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:10,161 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:10,161 INFO L82 PathProgramCache]: Analyzing trace with hash -557051134, now seen corresponding path program 111 times [2021-06-05 16:47:10,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:10,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611225548] [2021-06-05 16:47:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:10,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611225548] [2021-06-05 16:47:10,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611225548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047057201] [2021-06-05 16:47:10,260 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 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 [2021-06-05 16:47:10,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:47:10,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:10,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:10,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047057201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:10,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:10,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 16:47:10,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028279437] [2021-06-05 16:47:10,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:10,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:10,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:10,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:10,479 INFO L87 Difference]: Start difference. First operand 56897 states and 166373 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:11,200 INFO L93 Difference]: Finished difference Result 58288 states and 170073 transitions. [2021-06-05 16:47:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:47:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:11,302 INFO L225 Difference]: With dead ends: 58288 [2021-06-05 16:47:11,302 INFO L226 Difference]: Without dead ends: 58158 [2021-06-05 16:47:11,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:47:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58158 states. [2021-06-05 16:47:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58158 to 52473. [2021-06-05 16:47:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52473 states, 52472 states have (on average 2.9211579509071504) internal successors, (153279), 52472 states have internal predecessors, (153279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52473 states to 52473 states and 153279 transitions. [2021-06-05 16:47:12,363 INFO L78 Accepts]: Start accepts. Automaton has 52473 states and 153279 transitions. Word has length 40 [2021-06-05 16:47:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:12,364 INFO L482 AbstractCegarLoop]: Abstraction has 52473 states and 153279 transitions. [2021-06-05 16:47:12,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 52473 states and 153279 transitions. [2021-06-05 16:47:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:12,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:12,442 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:12,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 16:47:12,643 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash -161255976, now seen corresponding path program 112 times [2021-06-05 16:47:12,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:12,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365861961] [2021-06-05 16:47:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:12,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:12,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365861961] [2021-06-05 16:47:12,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365861961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:12,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630645867] [2021-06-05 16:47:12,757 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 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 [2021-06-05 16:47:12,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:47:12,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:12,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:12,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630645867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:12,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:12,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 16:47:12,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33014442] [2021-06-05 16:47:12,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:12,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:12,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:12,994 INFO L87 Difference]: Start difference. First operand 52473 states and 153279 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:13,420 INFO L93 Difference]: Finished difference Result 53321 states and 155327 transitions. [2021-06-05 16:47:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:47:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:13,516 INFO L225 Difference]: With dead ends: 53321 [2021-06-05 16:47:13,516 INFO L226 Difference]: Without dead ends: 53204 [2021-06-05 16:47:13,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:47:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53204 states. [2021-06-05 16:47:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53204 to 51075. [2021-06-05 16:47:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51075 states, 51074 states have (on average 2.920350863453029) internal successors, (149154), 51074 states have internal predecessors, (149154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51075 states to 51075 states and 149154 transitions. [2021-06-05 16:47:14,610 INFO L78 Accepts]: Start accepts. Automaton has 51075 states and 149154 transitions. Word has length 40 [2021-06-05 16:47:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:14,610 INFO L482 AbstractCegarLoop]: Abstraction has 51075 states and 149154 transitions. [2021-06-05 16:47:14,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:14,610 INFO L276 IsEmpty]: Start isEmpty. Operand 51075 states and 149154 transitions. [2021-06-05 16:47:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:14,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:14,671 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:14,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:14,872 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2036427680, now seen corresponding path program 113 times [2021-06-05 16:47:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:14,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937675667] [2021-06-05 16:47:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:14,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:14,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937675667] [2021-06-05 16:47:14,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937675667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:14,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815861242] [2021-06-05 16:47:14,993 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 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 [2021-06-05 16:47:15,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:47:15,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:15,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:15,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:15,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815861242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:15,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:15,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 16:47:15,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742104182] [2021-06-05 16:47:15,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:47:15,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:47:15,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:15,483 INFO L87 Difference]: Start difference. First operand 51075 states and 149154 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:15,900 INFO L93 Difference]: Finished difference Result 53291 states and 155408 transitions. [2021-06-05 16:47:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:47:15,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:15,998 INFO L225 Difference]: With dead ends: 53291 [2021-06-05 16:47:15,998 INFO L226 Difference]: Without dead ends: 53215 [2021-06-05 16:47:15,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:47:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53215 states. [2021-06-05 16:47:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53215 to 50481. [2021-06-05 16:47:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50481 states, 50480 states have (on average 2.9226426307448494) internal successors, (147535), 50480 states have internal predecessors, (147535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50481 states to 50481 states and 147535 transitions. [2021-06-05 16:47:16,999 INFO L78 Accepts]: Start accepts. Automaton has 50481 states and 147535 transitions. Word has length 40 [2021-06-05 16:47:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:16,999 INFO L482 AbstractCegarLoop]: Abstraction has 50481 states and 147535 transitions. [2021-06-05 16:47:16,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 50481 states and 147535 transitions. [2021-06-05 16:47:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:17,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:17,055 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:17,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:17,255 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:17,256 INFO L82 PathProgramCache]: Analyzing trace with hash -711983976, now seen corresponding path program 114 times [2021-06-05 16:47:17,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:17,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286769308] [2021-06-05 16:47:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:47:17,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:17,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286769308] [2021-06-05 16:47:17,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286769308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:17,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845317296] [2021-06-05 16:47:17,391 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 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 [2021-06-05 16:47:17,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:47:17,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:17,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:17,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845317296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:17,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:17,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 16:47:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476681932] [2021-06-05 16:47:17,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:47:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:47:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:17,643 INFO L87 Difference]: Start difference. First operand 50481 states and 147535 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:18,035 INFO L93 Difference]: Finished difference Result 51763 states and 151105 transitions. [2021-06-05 16:47:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:47:18,036 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:18,123 INFO L225 Difference]: With dead ends: 51763 [2021-06-05 16:47:18,124 INFO L226 Difference]: Without dead ends: 51687 [2021-06-05 16:47:18,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:47:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51687 states. [2021-06-05 16:47:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51687 to 51357. [2021-06-05 16:47:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51357 states, 51356 states have (on average 2.924429472700366) internal successors, (150187), 51356 states have internal predecessors, (150187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51357 states to 51357 states and 150187 transitions. [2021-06-05 16:47:19,264 INFO L78 Accepts]: Start accepts. Automaton has 51357 states and 150187 transitions. Word has length 40 [2021-06-05 16:47:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:19,264 INFO L482 AbstractCegarLoop]: Abstraction has 51357 states and 150187 transitions. [2021-06-05 16:47:19,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 51357 states and 150187 transitions. [2021-06-05 16:47:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:19,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:19,323 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:19,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 16:47:19,524 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:19,524 INFO L82 PathProgramCache]: Analyzing trace with hash 748763352, now seen corresponding path program 115 times [2021-06-05 16:47:19,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:19,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490455509] [2021-06-05 16:47:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:19,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:19,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490455509] [2021-06-05 16:47:19,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490455509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:19,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857916492] [2021-06-05 16:47:19,657 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 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 [2021-06-05 16:47:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:19,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:19,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:20,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857916492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:20,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:20,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:47:20,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365859800] [2021-06-05 16:47:20,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:47:20,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:20,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:47:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:47:20,125 INFO L87 Difference]: Start difference. First operand 51357 states and 150187 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:20,546 INFO L93 Difference]: Finished difference Result 51807 states and 151188 transitions. [2021-06-05 16:47:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:47:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:20,631 INFO L225 Difference]: With dead ends: 51807 [2021-06-05 16:47:20,632 INFO L226 Difference]: Without dead ends: 51731 [2021-06-05 16:47:20,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:47:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51731 states. [2021-06-05 16:47:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51731 to 51351. [2021-06-05 16:47:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51351 states, 51350 states have (on average 2.924479065238559) internal successors, (150172), 51350 states have internal predecessors, (150172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51351 states to 51351 states and 150172 transitions. [2021-06-05 16:47:21,545 INFO L78 Accepts]: Start accepts. Automaton has 51351 states and 150172 transitions. Word has length 40 [2021-06-05 16:47:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:21,546 INFO L482 AbstractCegarLoop]: Abstraction has 51351 states and 150172 transitions. [2021-06-05 16:47:21,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 51351 states and 150172 transitions. [2021-06-05 16:47:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:21,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:21,602 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:21,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 16:47:21,824 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash -960067266, now seen corresponding path program 116 times [2021-06-05 16:47:21,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:21,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277090141] [2021-06-05 16:47:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:21,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:21,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277090141] [2021-06-05 16:47:21,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277090141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:21,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156420341] [2021-06-05 16:47:21,991 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 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 [2021-06-05 16:47:22,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:47:22,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:47:22,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:22,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156420341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:22,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:22,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 16:47:22,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542864869] [2021-06-05 16:47:22,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:47:22,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:47:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:47:22,289 INFO L87 Difference]: Start difference. First operand 51351 states and 150172 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:23,003 INFO L93 Difference]: Finished difference Result 60681 states and 177304 transitions. [2021-06-05 16:47:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:47:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:23,340 INFO L225 Difference]: With dead ends: 60681 [2021-06-05 16:47:23,340 INFO L226 Difference]: Without dead ends: 60579 [2021-06-05 16:47:23,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:47:23,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60579 states. [2021-06-05 16:47:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60579 to 60113. [2021-06-05 16:47:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60113 states, 60112 states have (on average 2.927751530476444) internal successors, (175993), 60112 states have internal predecessors, (175993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175993 transitions. [2021-06-05 16:47:24,545 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175993 transitions. Word has length 40 [2021-06-05 16:47:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:24,546 INFO L482 AbstractCegarLoop]: Abstraction has 60113 states and 175993 transitions. [2021-06-05 16:47:24,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175993 transitions. [2021-06-05 16:47:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:24,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:24,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:24,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 16:47:24,831 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:24,831 INFO L82 PathProgramCache]: Analyzing trace with hash -988176450, now seen corresponding path program 117 times [2021-06-05 16:47:24,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:24,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576501545] [2021-06-05 16:47:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:24,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:24,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576501545] [2021-06-05 16:47:24,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576501545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:24,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841685765] [2021-06-05 16:47:24,936 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 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 [2021-06-05 16:47:24,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:47:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:24,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:24,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:25,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841685765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:25,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:25,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 16:47:25,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918857252] [2021-06-05 16:47:25,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:25,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:25,227 INFO L87 Difference]: Start difference. First operand 60113 states and 175993 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:25,617 INFO L93 Difference]: Finished difference Result 60823 states and 177836 transitions. [2021-06-05 16:47:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:47:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:25,721 INFO L225 Difference]: With dead ends: 60823 [2021-06-05 16:47:25,721 INFO L226 Difference]: Without dead ends: 60707 [2021-06-05 16:47:25,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:47:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60707 states. [2021-06-05 16:47:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60707 to 60113. [2021-06-05 16:47:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60113 states, 60112 states have (on average 2.9261212403513444) internal successors, (175895), 60112 states have internal predecessors, (175895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175895 transitions. [2021-06-05 16:47:26,946 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175895 transitions. Word has length 40 [2021-06-05 16:47:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:26,947 INFO L482 AbstractCegarLoop]: Abstraction has 60113 states and 175895 transitions. [2021-06-05 16:47:26,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175895 transitions. [2021-06-05 16:47:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:27,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:27,026 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:27,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 16:47:27,227 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash -851969850, now seen corresponding path program 118 times [2021-06-05 16:47:27,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:27,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275698174] [2021-06-05 16:47:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:27,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:27,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275698174] [2021-06-05 16:47:27,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275698174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:27,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723659219] [2021-06-05 16:47:27,612 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 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 [2021-06-05 16:47:27,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:47:27,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:27,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:27,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723659219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:27,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:27,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 16:47:27,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044876123] [2021-06-05 16:47:27,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:47:27,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:27,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:47:27,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:27,854 INFO L87 Difference]: Start difference. First operand 60113 states and 175895 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:28,335 INFO L93 Difference]: Finished difference Result 64142 states and 187437 transitions. [2021-06-05 16:47:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:47:28,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:28,448 INFO L225 Difference]: With dead ends: 64142 [2021-06-05 16:47:28,448 INFO L226 Difference]: Without dead ends: 64018 [2021-06-05 16:47:28,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 526.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:47:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64018 states. [2021-06-05 16:47:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64018 to 63541. [2021-06-05 16:47:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63541 states, 63540 states have (on average 2.9268334907145106) internal successors, (185971), 63540 states have internal predecessors, (185971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63541 states to 63541 states and 185971 transitions. [2021-06-05 16:47:29,622 INFO L78 Accepts]: Start accepts. Automaton has 63541 states and 185971 transitions. Word has length 40 [2021-06-05 16:47:29,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:29,622 INFO L482 AbstractCegarLoop]: Abstraction has 63541 states and 185971 transitions. [2021-06-05 16:47:29,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 63541 states and 185971 transitions. [2021-06-05 16:47:29,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:29,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:29,704 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:29,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:29,905 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2140494270, now seen corresponding path program 119 times [2021-06-05 16:47:29,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:29,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734471794] [2021-06-05 16:47:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:47:29,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:29,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734471794] [2021-06-05 16:47:29,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734471794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:29,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987564007] [2021-06-05 16:47:29,999 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 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 [2021-06-05 16:47:30,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:47:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:30,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987564007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:30,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:30,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 16:47:30,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474936698] [2021-06-05 16:47:30,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:47:30,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:47:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:30,229 INFO L87 Difference]: Start difference. First operand 63541 states and 185971 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:30,872 INFO L93 Difference]: Finished difference Result 67150 states and 196442 transitions. [2021-06-05 16:47:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:47:30,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:30,992 INFO L225 Difference]: With dead ends: 67150 [2021-06-05 16:47:30,992 INFO L226 Difference]: Without dead ends: 67019 [2021-06-05 16:47:30,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:47:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67019 states. [2021-06-05 16:47:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67019 to 66567. [2021-06-05 16:47:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66567 states, 66566 states have (on average 2.929483520115374) internal successors, (195004), 66566 states have internal predecessors, (195004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66567 states to 66567 states and 195004 transitions. [2021-06-05 16:47:32,266 INFO L78 Accepts]: Start accepts. Automaton has 66567 states and 195004 transitions. Word has length 40 [2021-06-05 16:47:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:32,266 INFO L482 AbstractCegarLoop]: Abstraction has 66567 states and 195004 transitions. [2021-06-05 16:47:32,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 66567 states and 195004 transitions. [2021-06-05 16:47:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:32,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:32,355 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:32,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:32,555 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:32,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1155037826, now seen corresponding path program 120 times [2021-06-05 16:47:32,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:32,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324321805] [2021-06-05 16:47:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:32,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:32,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324321805] [2021-06-05 16:47:32,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324321805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:32,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841811580] [2021-06-05 16:47:32,702 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 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 [2021-06-05 16:47:32,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:47:32,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:32,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:32,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841811580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:32,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:32,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 16:47:32,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173739913] [2021-06-05 16:47:32,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:47:32,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:32,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:47:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:47:32,943 INFO L87 Difference]: Start difference. First operand 66567 states and 195004 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:33,816 INFO L93 Difference]: Finished difference Result 67138 states and 196301 transitions. [2021-06-05 16:47:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:47:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:33,945 INFO L225 Difference]: With dead ends: 67138 [2021-06-05 16:47:33,945 INFO L226 Difference]: Without dead ends: 67008 [2021-06-05 16:47:33,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:47:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67008 states. [2021-06-05 16:47:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67008 to 66551. [2021-06-05 16:47:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66551 states, 66550 states have (on average 2.929526671675432) internal successors, (194960), 66550 states have internal predecessors, (194960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66551 states to 66551 states and 194960 transitions. [2021-06-05 16:47:35,196 INFO L78 Accepts]: Start accepts. Automaton has 66551 states and 194960 transitions. Word has length 40 [2021-06-05 16:47:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:35,196 INFO L482 AbstractCegarLoop]: Abstraction has 66551 states and 194960 transitions. [2021-06-05 16:47:35,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 66551 states and 194960 transitions. [2021-06-05 16:47:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:35,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:35,282 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:35,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:35,483 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:35,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2930118, now seen corresponding path program 121 times [2021-06-05 16:47:35,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:35,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670805580] [2021-06-05 16:47:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:47:35,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:35,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670805580] [2021-06-05 16:47:35,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670805580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:35,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752974583] [2021-06-05 16:47:35,592 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 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 [2021-06-05 16:47:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:35,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752974583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:35,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:35,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 16:47:35,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147792365] [2021-06-05 16:47:35,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:47:35,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:47:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:35,829 INFO L87 Difference]: Start difference. First operand 66551 states and 194960 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:36,247 INFO L93 Difference]: Finished difference Result 68643 states and 200950 transitions. [2021-06-05 16:47:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:47:36,248 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:36,368 INFO L225 Difference]: With dead ends: 68643 [2021-06-05 16:47:36,368 INFO L226 Difference]: Without dead ends: 68519 [2021-06-05 16:47:36,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:47:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68519 states. [2021-06-05 16:47:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68519 to 68109. [2021-06-05 16:47:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68109 states, 68108 states have (on average 2.9315352087860456) internal successors, (199661), 68108 states have internal predecessors, (199661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:38,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68109 states to 68109 states and 199661 transitions. [2021-06-05 16:47:38,149 INFO L78 Accepts]: Start accepts. Automaton has 68109 states and 199661 transitions. Word has length 40 [2021-06-05 16:47:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:38,149 INFO L482 AbstractCegarLoop]: Abstraction has 68109 states and 199661 transitions. [2021-06-05 16:47:38,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 68109 states and 199661 transitions. [2021-06-05 16:47:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:38,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:38,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:38,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 16:47:38,443 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1002365318, now seen corresponding path program 122 times [2021-06-05 16:47:38,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:38,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097599484] [2021-06-05 16:47:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:47:38,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097599484] [2021-06-05 16:47:38,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097599484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945397148] [2021-06-05 16:47:38,555 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 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 [2021-06-05 16:47:38,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:47:38,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:38,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945397148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:38,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:38,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 16:47:38,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667446335] [2021-06-05 16:47:38,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:47:38,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:47:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:47:38,792 INFO L87 Difference]: Start difference. First operand 68109 states and 199661 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:39,301 INFO L93 Difference]: Finished difference Result 68644 states and 200867 transitions. [2021-06-05 16:47:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:47:39,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:39,419 INFO L225 Difference]: With dead ends: 68644 [2021-06-05 16:47:39,420 INFO L226 Difference]: Without dead ends: 68514 [2021-06-05 16:47:39,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:47:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68514 states. [2021-06-05 16:47:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68514 to 68093. [2021-06-05 16:47:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68093 states, 68092 states have (on average 2.9315778652411444) internal successors, (199617), 68092 states have internal predecessors, (199617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68093 states to 68093 states and 199617 transitions. [2021-06-05 16:47:41,179 INFO L78 Accepts]: Start accepts. Automaton has 68093 states and 199617 transitions. Word has length 40 [2021-06-05 16:47:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:41,180 INFO L482 AbstractCegarLoop]: Abstraction has 68093 states and 199617 transitions. [2021-06-05 16:47:41,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 68093 states and 199617 transitions. [2021-06-05 16:47:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:41,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:41,270 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:41,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:41,471 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:41,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1831854650, now seen corresponding path program 123 times [2021-06-05 16:47:41,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:41,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402194436] [2021-06-05 16:47:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:41,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:41,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402194436] [2021-06-05 16:47:41,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402194436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:41,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354161270] [2021-06-05 16:47:41,614 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 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 [2021-06-05 16:47:41,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:47:41,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:41,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354161270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:41,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:41,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:47:41,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533893138] [2021-06-05 16:47:41,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:47:41,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:47:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:47:41,927 INFO L87 Difference]: Start difference. First operand 68093 states and 199617 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:42,454 INFO L93 Difference]: Finished difference Result 68603 states and 200761 transitions. [2021-06-05 16:47:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:47:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:42,571 INFO L225 Difference]: With dead ends: 68603 [2021-06-05 16:47:42,571 INFO L226 Difference]: Without dead ends: 68527 [2021-06-05 16:47:42,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:47:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68527 states. [2021-06-05 16:47:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68527 to 68087. [2021-06-05 16:47:43,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68087 states, 68086 states have (on average 2.9316158975413447) internal successors, (199602), 68086 states have internal predecessors, (199602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68087 states to 68087 states and 199602 transitions. [2021-06-05 16:47:43,954 INFO L78 Accepts]: Start accepts. Automaton has 68087 states and 199602 transitions. Word has length 40 [2021-06-05 16:47:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:43,954 INFO L482 AbstractCegarLoop]: Abstraction has 68087 states and 199602 transitions. [2021-06-05 16:47:43,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 68087 states and 199602 transitions. [2021-06-05 16:47:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:44,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:44,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:44,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 16:47:44,557 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1497503238, now seen corresponding path program 124 times [2021-06-05 16:47:44,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:44,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055465042] [2021-06-05 16:47:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:44,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055465042] [2021-06-05 16:47:44,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055465042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744642836] [2021-06-05 16:47:44,701 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 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 [2021-06-05 16:47:44,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:47:44,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744642836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:44,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:44,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 16:47:44,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076968541] [2021-06-05 16:47:44,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:44,885 INFO L87 Difference]: Start difference. First operand 68087 states and 199602 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:45,342 INFO L93 Difference]: Finished difference Result 90862 states and 266329 transitions. [2021-06-05 16:47:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:47:45,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:45,505 INFO L225 Difference]: With dead ends: 90862 [2021-06-05 16:47:45,506 INFO L226 Difference]: Without dead ends: 90825 [2021-06-05 16:47:45,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90825 states. [2021-06-05 16:47:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90825 to 68095. [2021-06-05 16:47:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68095 states, 68094 states have (on average 2.931565189297148) internal successors, (199622), 68094 states have internal predecessors, (199622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68095 states to 68095 states and 199622 transitions. [2021-06-05 16:47:46,962 INFO L78 Accepts]: Start accepts. Automaton has 68095 states and 199622 transitions. Word has length 40 [2021-06-05 16:47:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:46,962 INFO L482 AbstractCegarLoop]: Abstraction has 68095 states and 199622 transitions. [2021-06-05 16:47:46,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 68095 states and 199622 transitions. [2021-06-05 16:47:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:47,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:47,053 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forcibly destroying the process [2021-06-05 16:47:47,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:47,271 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash -627011198, now seen corresponding path program 125 times [2021-06-05 16:47:47,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:47,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925307311] [2021-06-05 16:47:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:47,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925307311] [2021-06-05 16:47:47,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925307311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719263996] [2021-06-05 16:47:47,421 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 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 [2021-06-05 16:47:47,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:47:47,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:47,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719263996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:47,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:47,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 16:47:47,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811194423] [2021-06-05 16:47:47,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:47,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:47,650 INFO L87 Difference]: Start difference. First operand 68095 states and 199622 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:48,086 INFO L93 Difference]: Finished difference Result 90806 states and 266237 transitions. [2021-06-05 16:47:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:47:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:48,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:48,246 INFO L225 Difference]: With dead ends: 90806 [2021-06-05 16:47:48,246 INFO L226 Difference]: Without dead ends: 90769 [2021-06-05 16:47:48,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:47:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90769 states. [2021-06-05 16:47:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90769 to 68117. [2021-06-05 16:47:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68117 states, 68116 states have (on average 2.9315726114275646) internal successors, (199687), 68116 states have internal predecessors, (199687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68117 states to 68117 states and 199687 transitions. [2021-06-05 16:47:49,765 INFO L78 Accepts]: Start accepts. Automaton has 68117 states and 199687 transitions. Word has length 40 [2021-06-05 16:47:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:49,765 INFO L482 AbstractCegarLoop]: Abstraction has 68117 states and 199687 transitions. [2021-06-05 16:47:49,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 68117 states and 199687 transitions. [2021-06-05 16:47:49,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:49,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:49,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:50,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:50,061 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2073309766, now seen corresponding path program 126 times [2021-06-05 16:47:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:50,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952853216] [2021-06-05 16:47:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:50,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:50,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952853216] [2021-06-05 16:47:50,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952853216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215516894] [2021-06-05 16:47:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:47:50,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:47:50,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:47:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:50,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215516894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:50,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:50,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 16:47:50,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787955851] [2021-06-05 16:47:50,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:47:50,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:47:50,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:47:50,652 INFO L87 Difference]: Start difference. First operand 68117 states and 199687 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:51,548 INFO L93 Difference]: Finished difference Result 92902 states and 271948 transitions. [2021-06-05 16:47:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:47:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:51,711 INFO L225 Difference]: With dead ends: 92902 [2021-06-05 16:47:51,711 INFO L226 Difference]: Without dead ends: 92828 [2021-06-05 16:47:51,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:47:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92828 states. [2021-06-05 16:47:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92828 to 69669. [2021-06-05 16:47:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69669 states, 69668 states have (on average 2.9318338405006603) internal successors, (204255), 69668 states have internal predecessors, (204255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69669 states to 69669 states and 204255 transitions. [2021-06-05 16:47:53,533 INFO L78 Accepts]: Start accepts. Automaton has 69669 states and 204255 transitions. Word has length 40 [2021-06-05 16:47:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:53,533 INFO L482 AbstractCegarLoop]: Abstraction has 69669 states and 204255 transitions. [2021-06-05 16:47:53,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 69669 states and 204255 transitions. [2021-06-05 16:47:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:53,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:53,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:53,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:53,831 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1408085314, now seen corresponding path program 127 times [2021-06-05 16:47:53,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:53,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090428247] [2021-06-05 16:47:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:53,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090428247] [2021-06-05 16:47:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090428247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542123742] [2021-06-05 16:47:53,951 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 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 [2021-06-05 16:47:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:47:53,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:54,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542123742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:54,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:54,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 16:47:54,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638490932] [2021-06-05 16:47:54,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:54,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:54,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:54,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:54,155 INFO L87 Difference]: Start difference. First operand 69669 states and 204255 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:54,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:54,745 INFO L93 Difference]: Finished difference Result 95491 states and 279885 transitions. [2021-06-05 16:47:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:47:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:54,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:54,914 INFO L225 Difference]: With dead ends: 95491 [2021-06-05 16:47:54,914 INFO L226 Difference]: Without dead ends: 95385 [2021-06-05 16:47:54,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:47:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95385 states. [2021-06-05 16:47:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95385 to 72491. [2021-06-05 16:47:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72491 states, 72490 states have (on average 2.932487239619258) internal successors, (212576), 72490 states have internal predecessors, (212576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72491 states to 72491 states and 212576 transitions. [2021-06-05 16:47:56,826 INFO L78 Accepts]: Start accepts. Automaton has 72491 states and 212576 transitions. Word has length 40 [2021-06-05 16:47:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:56,826 INFO L482 AbstractCegarLoop]: Abstraction has 72491 states and 212576 transitions. [2021-06-05 16:47:56,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 72491 states and 212576 transitions. [2021-06-05 16:47:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:47:56,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:56,922 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:57,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 16:47:57,123 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:57,123 INFO L82 PathProgramCache]: Analyzing trace with hash -346917946, now seen corresponding path program 128 times [2021-06-05 16:47:57,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:57,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933770430] [2021-06-05 16:47:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:57,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933770430] [2021-06-05 16:47:57,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933770430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606621024] [2021-06-05 16:47:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:47:57,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:47:57,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:47:57,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:57,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606621024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:57,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:57,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 16:47:57,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950556495] [2021-06-05 16:47:57,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:47:57,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:57,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:47:57,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:47:57,467 INFO L87 Difference]: Start difference. First operand 72491 states and 212576 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:58,592 INFO L93 Difference]: Finished difference Result 100288 states and 293712 transitions. [2021-06-05 16:47:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:47:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:47:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:58,787 INFO L225 Difference]: With dead ends: 100288 [2021-06-05 16:47:58,787 INFO L226 Difference]: Without dead ends: 100151 [2021-06-05 16:47:58,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:47:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100151 states. [2021-06-05 16:48:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100151 to 73759. [2021-06-05 16:48:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73759 states, 73758 states have (on average 2.9331597928360313) internal successors, (216344), 73758 states have internal predecessors, (216344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73759 states to 73759 states and 216344 transitions. [2021-06-05 16:48:00,596 INFO L78 Accepts]: Start accepts. Automaton has 73759 states and 216344 transitions. Word has length 40 [2021-06-05 16:48:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:00,596 INFO L482 AbstractCegarLoop]: Abstraction has 73759 states and 216344 transitions. [2021-06-05 16:48:00,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 73759 states and 216344 transitions. [2021-06-05 16:48:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:00,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:00,692 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:00,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 16:48:00,892 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2017252144, now seen corresponding path program 129 times [2021-06-05 16:48:00,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:00,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891336644] [2021-06-05 16:48:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:01,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891336644] [2021-06-05 16:48:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891336644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231079323] [2021-06-05 16:48:01,022 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 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 [2021-06-05 16:48:01,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:48:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:01,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231079323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:01,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:01,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 16:48:01,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196113254] [2021-06-05 16:48:01,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:48:01,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:48:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:48:01,235 INFO L87 Difference]: Start difference. First operand 73759 states and 216344 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:01,700 INFO L93 Difference]: Finished difference Result 78859 states and 230387 transitions. [2021-06-05 16:48:01,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:48:01,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:01,834 INFO L225 Difference]: With dead ends: 78859 [2021-06-05 16:48:01,835 INFO L226 Difference]: Without dead ends: 78785 [2021-06-05 16:48:01,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:48:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78785 states. [2021-06-05 16:48:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78785 to 75025. [2021-06-05 16:48:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75025 states, 75024 states have (on average 2.9336612284069097) internal successors, (220095), 75024 states have internal predecessors, (220095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75025 states to 75025 states and 220095 transitions. [2021-06-05 16:48:03,843 INFO L78 Accepts]: Start accepts. Automaton has 75025 states and 220095 transitions. Word has length 40 [2021-06-05 16:48:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:03,843 INFO L482 AbstractCegarLoop]: Abstraction has 75025 states and 220095 transitions. [2021-06-05 16:48:03,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 75025 states and 220095 transitions. [2021-06-05 16:48:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:03,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:03,953 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:04,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 16:48:04,154 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash -727268640, now seen corresponding path program 130 times [2021-06-05 16:48:04,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:04,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342645222] [2021-06-05 16:48:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:04,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:04,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342645222] [2021-06-05 16:48:04,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342645222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:04,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87989172] [2021-06-05 16:48:04,293 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 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 [2021-06-05 16:48:04,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:48:04,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:04,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:04,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87989172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:04,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:04,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 16:48:04,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193945659] [2021-06-05 16:48:04,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:04,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:04,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:04,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:04,539 INFO L87 Difference]: Start difference. First operand 75025 states and 220095 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:05,025 INFO L93 Difference]: Finished difference Result 80009 states and 233828 transitions. [2021-06-05 16:48:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:48:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:05,165 INFO L225 Difference]: With dead ends: 80009 [2021-06-05 16:48:05,165 INFO L226 Difference]: Without dead ends: 79935 [2021-06-05 16:48:05,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:48:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79935 states. [2021-06-05 16:48:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79935 to 74919. [2021-06-05 16:48:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74919 states, 74918 states have (on average 2.934087936143517) internal successors, (219816), 74918 states have internal predecessors, (219816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74919 states to 74919 states and 219816 transitions. [2021-06-05 16:48:07,027 INFO L78 Accepts]: Start accepts. Automaton has 74919 states and 219816 transitions. Word has length 40 [2021-06-05 16:48:07,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:07,028 INFO L482 AbstractCegarLoop]: Abstraction has 74919 states and 219816 transitions. [2021-06-05 16:48:07,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 74919 states and 219816 transitions. [2021-06-05 16:48:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:07,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:07,139 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:07,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:07,339 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1155007878, now seen corresponding path program 131 times [2021-06-05 16:48:07,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:07,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528158845] [2021-06-05 16:48:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:07,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:07,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528158845] [2021-06-05 16:48:07,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528158845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:07,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367676923] [2021-06-05 16:48:07,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:48:07,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:48:07,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:07,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367676923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:07,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:07,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 16:48:07,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369951528] [2021-06-05 16:48:07,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:07,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:07,648 INFO L87 Difference]: Start difference. First operand 74919 states and 219816 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:08,175 INFO L93 Difference]: Finished difference Result 81553 states and 238414 transitions. [2021-06-05 16:48:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:48:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:08,322 INFO L225 Difference]: With dead ends: 81553 [2021-06-05 16:48:08,322 INFO L226 Difference]: Without dead ends: 81439 [2021-06-05 16:48:08,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:48:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81439 states. [2021-06-05 16:48:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81439 to 77163. [2021-06-05 16:48:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77163 states, 77162 states have (on average 2.93608252766906) internal successors, (226554), 77162 states have internal predecessors, (226554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77163 states to 77163 states and 226554 transitions. [2021-06-05 16:48:10,250 INFO L78 Accepts]: Start accepts. Automaton has 77163 states and 226554 transitions. Word has length 40 [2021-06-05 16:48:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:10,251 INFO L482 AbstractCegarLoop]: Abstraction has 77163 states and 226554 transitions. [2021-06-05 16:48:10,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 77163 states and 226554 transitions. [2021-06-05 16:48:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:10,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:10,358 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:10,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 16:48:10,559 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash -862357216, now seen corresponding path program 132 times [2021-06-05 16:48:10,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:10,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064619797] [2021-06-05 16:48:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:10,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064619797] [2021-06-05 16:48:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064619797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406138751] [2021-06-05 16:48:10,669 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 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 [2021-06-05 16:48:10,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:48:10,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:10,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:10,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406138751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:10,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:10,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 16:48:10,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766419092] [2021-06-05 16:48:10,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:10,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:10,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:10,875 INFO L87 Difference]: Start difference. First operand 77163 states and 226554 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:11,532 INFO L93 Difference]: Finished difference Result 86206 states and 252453 transitions. [2021-06-05 16:48:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:48:11,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:11,682 INFO L225 Difference]: With dead ends: 86206 [2021-06-05 16:48:11,683 INFO L226 Difference]: Without dead ends: 86116 [2021-06-05 16:48:11,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:48:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86116 states. [2021-06-05 16:48:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86116 to 81055. [2021-06-05 16:48:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81055 states, 81054 states have (on average 2.940928270042194) internal successors, (238374), 81054 states have internal predecessors, (238374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81055 states to 81055 states and 238374 transitions. [2021-06-05 16:48:13,756 INFO L78 Accepts]: Start accepts. Automaton has 81055 states and 238374 transitions. Word has length 40 [2021-06-05 16:48:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:13,756 INFO L482 AbstractCegarLoop]: Abstraction has 81055 states and 238374 transitions. [2021-06-05 16:48:13,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 81055 states and 238374 transitions. [2021-06-05 16:48:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:13,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:13,939 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:14,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 16:48:14,162 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:14,163 INFO L82 PathProgramCache]: Analyzing trace with hash -981440228, now seen corresponding path program 133 times [2021-06-05 16:48:14,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:14,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192998022] [2021-06-05 16:48:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:48:14,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192998022] [2021-06-05 16:48:14,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192998022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487334137] [2021-06-05 16:48:14,273 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 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 [2021-06-05 16:48:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:14,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487334137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:14,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:14,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 16:48:14,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159022724] [2021-06-05 16:48:14,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:14,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:14,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:14,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:14,483 INFO L87 Difference]: Start difference. First operand 81055 states and 238374 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2021-06-05 16:48:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:15,077 INFO L93 Difference]: Finished difference Result 86179 states and 252372 transitions. [2021-06-05 16:48:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:48:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) Word has length 40 [2021-06-05 16:48:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:15,244 INFO L225 Difference]: With dead ends: 86179 [2021-06-05 16:48:15,244 INFO L226 Difference]: Without dead ends: 86059 [2021-06-05 16:48:15,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:48:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86059 states. [2021-06-05 16:48:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86059 to 80643. [2021-06-05 16:48:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80643 states, 80642 states have (on average 2.9357158800624985) internal successors, (236742), 80642 states have internal predecessors, (236742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80643 states to 80643 states and 236742 transitions. [2021-06-05 16:48:17,104 INFO L78 Accepts]: Start accepts. Automaton has 80643 states and 236742 transitions. Word has length 40 [2021-06-05 16:48:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:17,104 INFO L482 AbstractCegarLoop]: Abstraction has 80643 states and 236742 transitions. [2021-06-05 16:48:17,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2021-06-05 16:48:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 80643 states and 236742 transitions. [2021-06-05 16:48:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:17,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:17,215 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:17,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 16:48:17,416 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash -837152646, now seen corresponding path program 134 times [2021-06-05 16:48:17,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:17,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503076301] [2021-06-05 16:48:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:17,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503076301] [2021-06-05 16:48:17,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503076301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:17,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144112191] [2021-06-05 16:48:17,533 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 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 [2021-06-05 16:48:17,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:48:17,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:17,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:48:17,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:17,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144112191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:17,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:17,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-05 16:48:17,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325807040] [2021-06-05 16:48:17,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:48:17,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:48:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:48:17,760 INFO L87 Difference]: Start difference. First operand 80643 states and 236742 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:18,989 INFO L93 Difference]: Finished difference Result 84857 states and 247966 transitions. [2021-06-05 16:48:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:48:19,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:19,171 INFO L225 Difference]: With dead ends: 84857 [2021-06-05 16:48:19,172 INFO L226 Difference]: Without dead ends: 84733 [2021-06-05 16:48:19,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:48:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84733 states. [2021-06-05 16:48:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84733 to 77769. [2021-06-05 16:48:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77769 states, 77768 states have (on average 2.9353075815245346) internal successors, (228273), 77768 states have internal predecessors, (228273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77769 states to 77769 states and 228273 transitions. [2021-06-05 16:48:20,633 INFO L78 Accepts]: Start accepts. Automaton has 77769 states and 228273 transitions. Word has length 40 [2021-06-05 16:48:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:20,633 INFO L482 AbstractCegarLoop]: Abstraction has 77769 states and 228273 transitions. [2021-06-05 16:48:20,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 77769 states and 228273 transitions. [2021-06-05 16:48:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:20,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:20,739 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:20,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 16:48:20,939 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash 762977632, now seen corresponding path program 135 times [2021-06-05 16:48:20,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:20,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250289615] [2021-06-05 16:48:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:21,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:21,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250289615] [2021-06-05 16:48:21,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250289615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:21,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010382572] [2021-06-05 16:48:21,071 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 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 [2021-06-05 16:48:21,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:48:21,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:21,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:21,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:21,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010382572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:21,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:21,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:48:21,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193121862] [2021-06-05 16:48:21,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:48:21,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:21,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:48:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:48:21,300 INFO L87 Difference]: Start difference. First operand 77769 states and 228273 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:21,845 INFO L93 Difference]: Finished difference Result 81477 states and 238950 transitions. [2021-06-05 16:48:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:48:21,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:21,985 INFO L225 Difference]: With dead ends: 81477 [2021-06-05 16:48:21,985 INFO L226 Difference]: Without dead ends: 81403 [2021-06-05 16:48:21,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:48:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81403 states. [2021-06-05 16:48:23,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81403 to 81021. [2021-06-05 16:48:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81021 states, 81020 states have (on average 2.936571216983461) internal successors, (237921), 81020 states have internal predecessors, (237921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81021 states to 81021 states and 237921 transitions. [2021-06-05 16:48:23,906 INFO L78 Accepts]: Start accepts. Automaton has 81021 states and 237921 transitions. Word has length 40 [2021-06-05 16:48:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:23,906 INFO L482 AbstractCegarLoop]: Abstraction has 81021 states and 237921 transitions. [2021-06-05 16:48:23,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 81021 states and 237921 transitions. [2021-06-05 16:48:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:24,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:24,020 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:24,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 16:48:24,220 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1088400518, now seen corresponding path program 136 times [2021-06-05 16:48:24,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:24,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403957287] [2021-06-05 16:48:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:24,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:24,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403957287] [2021-06-05 16:48:24,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403957287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:24,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439006923] [2021-06-05 16:48:24,345 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 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 [2021-06-05 16:48:24,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:48:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:24,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:24,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:24,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439006923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:24,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:24,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 16:48:24,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916237622] [2021-06-05 16:48:24,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:48:24,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:24,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:48:24,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:48:24,561 INFO L87 Difference]: Start difference. First operand 81021 states and 237921 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:25,061 INFO L93 Difference]: Finished difference Result 83181 states and 243998 transitions. [2021-06-05 16:48:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:48:25,062 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:25,207 INFO L225 Difference]: With dead ends: 83181 [2021-06-05 16:48:25,207 INFO L226 Difference]: Without dead ends: 83107 [2021-06-05 16:48:25,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:48:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83107 states. [2021-06-05 16:48:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83107 to 79989. [2021-06-05 16:48:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79989 states, 79988 states have (on average 2.937803170475571) internal successors, (234989), 79988 states have internal predecessors, (234989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79989 states to 79989 states and 234989 transitions. [2021-06-05 16:48:27,152 INFO L78 Accepts]: Start accepts. Automaton has 79989 states and 234989 transitions. Word has length 40 [2021-06-05 16:48:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:27,152 INFO L482 AbstractCegarLoop]: Abstraction has 79989 states and 234989 transitions. [2021-06-05 16:48:27,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 79989 states and 234989 transitions. [2021-06-05 16:48:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:27,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:27,268 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:27,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:27,469 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1493177376, now seen corresponding path program 137 times [2021-06-05 16:48:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:27,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759749340] [2021-06-05 16:48:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:27,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:27,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759749340] [2021-06-05 16:48:27,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759749340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:27,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056488642] [2021-06-05 16:48:27,568 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 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 [2021-06-05 16:48:27,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:48:27,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:27,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:27,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056488642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:27,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:27,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 16:48:27,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215624457] [2021-06-05 16:48:27,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:27,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:27,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:27,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:27,777 INFO L87 Difference]: Start difference. First operand 79989 states and 234989 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:28,226 INFO L93 Difference]: Finished difference Result 83703 states and 245487 transitions. [2021-06-05 16:48:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:48:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:28,371 INFO L225 Difference]: With dead ends: 83703 [2021-06-05 16:48:28,371 INFO L226 Difference]: Without dead ends: 83589 [2021-06-05 16:48:28,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:48:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83589 states. [2021-06-05 16:48:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83589 to 79601. [2021-06-05 16:48:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79601 states, 79600 states have (on average 2.9393090452261306) internal successors, (233969), 79600 states have internal predecessors, (233969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79601 states to 79601 states and 233969 transitions. [2021-06-05 16:48:30,286 INFO L78 Accepts]: Start accepts. Automaton has 79601 states and 233969 transitions. Word has length 40 [2021-06-05 16:48:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:30,286 INFO L482 AbstractCegarLoop]: Abstraction has 79601 states and 233969 transitions. [2021-06-05 16:48:30,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:30,286 INFO L276 IsEmpty]: Start isEmpty. Operand 79601 states and 233969 transitions. [2021-06-05 16:48:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:30,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:30,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:30,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 16:48:30,597 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1063230778, now seen corresponding path program 138 times [2021-06-05 16:48:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:30,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015151556] [2021-06-05 16:48:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:30,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:30,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015151556] [2021-06-05 16:48:30,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015151556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:30,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364831663] [2021-06-05 16:48:30,688 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 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 [2021-06-05 16:48:30,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:48:30,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:30,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364831663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:30,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:30,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 16:48:30,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880022418] [2021-06-05 16:48:30,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:30,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:30,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:30,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:30,901 INFO L87 Difference]: Start difference. First operand 79601 states and 233969 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:31,420 INFO L93 Difference]: Finished difference Result 84051 states and 247089 transitions. [2021-06-05 16:48:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:48:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:31,563 INFO L225 Difference]: With dead ends: 84051 [2021-06-05 16:48:31,563 INFO L226 Difference]: Without dead ends: 83961 [2021-06-05 16:48:31,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:48:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83961 states. [2021-06-05 16:48:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83961 to 82811. [2021-06-05 16:48:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82811 states, 82810 states have (on average 2.943557541359739) internal successors, (243756), 82810 states have internal predecessors, (243756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82811 states to 82811 states and 243756 transitions. [2021-06-05 16:48:33,488 INFO L78 Accepts]: Start accepts. Automaton has 82811 states and 243756 transitions. Word has length 40 [2021-06-05 16:48:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:33,488 INFO L482 AbstractCegarLoop]: Abstraction has 82811 states and 243756 transitions. [2021-06-05 16:48:33,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 82811 states and 243756 transitions. [2021-06-05 16:48:33,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:33,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:33,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:33,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 16:48:33,811 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:33,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1182313790, now seen corresponding path program 139 times [2021-06-05 16:48:33,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:33,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446072310] [2021-06-05 16:48:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:48:33,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:33,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446072310] [2021-06-05 16:48:33,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446072310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:33,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156809078] [2021-06-05 16:48:33,926 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 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 [2021-06-05 16:48:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:33,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:33,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:34,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156809078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:34,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:34,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 16:48:34,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105819150] [2021-06-05 16:48:34,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:34,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:34,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:34,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:34,153 INFO L87 Difference]: Start difference. First operand 82811 states and 243756 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:34,622 INFO L93 Difference]: Finished difference Result 84018 states and 247010 transitions. [2021-06-05 16:48:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:48:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:34,767 INFO L225 Difference]: With dead ends: 84018 [2021-06-05 16:48:34,767 INFO L226 Difference]: Without dead ends: 83902 [2021-06-05 16:48:34,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 268.7ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:48:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83902 states. [2021-06-05 16:48:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83902 to 82781. [2021-06-05 16:48:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82781 states, 82780 states have (on average 2.9422928243537085) internal successors, (243563), 82780 states have internal predecessors, (243563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82781 states to 82781 states and 243563 transitions. [2021-06-05 16:48:36,724 INFO L78 Accepts]: Start accepts. Automaton has 82781 states and 243563 transitions. Word has length 40 [2021-06-05 16:48:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:36,724 INFO L482 AbstractCegarLoop]: Abstraction has 82781 states and 243563 transitions. [2021-06-05 16:48:36,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:36,724 INFO L276 IsEmpty]: Start isEmpty. Operand 82781 states and 243563 transitions. [2021-06-05 16:48:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:36,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:36,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:37,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:37,048 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:37,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1038026208, now seen corresponding path program 140 times [2021-06-05 16:48:37,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:37,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602191795] [2021-06-05 16:48:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:48:37,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:37,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602191795] [2021-06-05 16:48:37,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602191795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:37,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837952556] [2021-06-05 16:48:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:48:37,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:48:37,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:48:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:37,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837952556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:37,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:37,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 16:48:37,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121335212] [2021-06-05 16:48:37,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:48:37,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:48:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:48:37,373 INFO L87 Difference]: Start difference. First operand 82781 states and 243563 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:38,208 INFO L93 Difference]: Finished difference Result 83683 states and 245710 transitions. [2021-06-05 16:48:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:48:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:38,749 INFO L225 Difference]: With dead ends: 83683 [2021-06-05 16:48:38,749 INFO L226 Difference]: Without dead ends: 83552 [2021-06-05 16:48:38,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:48:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83552 states. [2021-06-05 16:48:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83552 to 82767. [2021-06-05 16:48:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82767 states, 82766 states have (on average 2.9417876905975886) internal successors, (243480), 82766 states have internal predecessors, (243480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82767 states to 82767 states and 243480 transitions. [2021-06-05 16:48:40,255 INFO L78 Accepts]: Start accepts. Automaton has 82767 states and 243480 transitions. Word has length 40 [2021-06-05 16:48:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:40,256 INFO L482 AbstractCegarLoop]: Abstraction has 82767 states and 243480 transitions. [2021-06-05 16:48:40,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 82767 states and 243480 transitions. [2021-06-05 16:48:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:40,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:40,370 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:40,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 16:48:40,571 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:40,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:40,571 INFO L82 PathProgramCache]: Analyzing trace with hash -38591008, now seen corresponding path program 141 times [2021-06-05 16:48:40,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:40,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486578049] [2021-06-05 16:48:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:40,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:40,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486578049] [2021-06-05 16:48:40,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486578049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:40,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54257963] [2021-06-05 16:48:40,693 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 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 [2021-06-05 16:48:40,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:48:40,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:48:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:40,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54257963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:40,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:40,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 16:48:40,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401143558] [2021-06-05 16:48:40,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:48:40,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:40,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:48:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:48:40,936 INFO L87 Difference]: Start difference. First operand 82767 states and 243480 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:41,955 INFO L93 Difference]: Finished difference Result 83411 states and 244946 transitions. [2021-06-05 16:48:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:48:41,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:42,144 INFO L225 Difference]: With dead ends: 83411 [2021-06-05 16:48:42,144 INFO L226 Difference]: Without dead ends: 83281 [2021-06-05 16:48:42,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:48:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83281 states. [2021-06-05 16:48:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83281 to 79371. [2021-06-05 16:48:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79371 states, 79370 states have (on average 2.9420435932972158) internal successors, (233510), 79370 states have internal predecessors, (233510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79371 states to 79371 states and 233510 transitions. [2021-06-05 16:48:43,673 INFO L78 Accepts]: Start accepts. Automaton has 79371 states and 233510 transitions. Word has length 40 [2021-06-05 16:48:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:43,673 INFO L482 AbstractCegarLoop]: Abstraction has 79371 states and 233510 transitions. [2021-06-05 16:48:43,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 79371 states and 233510 transitions. [2021-06-05 16:48:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:43,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:43,786 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:43,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:43,987 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:43,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1856068912, now seen corresponding path program 142 times [2021-06-05 16:48:43,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:43,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160392958] [2021-06-05 16:48:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:44,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:44,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160392958] [2021-06-05 16:48:44,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160392958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:44,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726646216] [2021-06-05 16:48:44,120 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 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 [2021-06-05 16:48:44,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:48:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:44,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:44,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726646216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:44,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:44,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:48:44,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892614315] [2021-06-05 16:48:44,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:48:44,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:44,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:48:44,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:48:44,363 INFO L87 Difference]: Start difference. First operand 79371 states and 233510 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:44,918 INFO L93 Difference]: Finished difference Result 87077 states and 255818 transitions. [2021-06-05 16:48:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:48:44,918 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:45,467 INFO L225 Difference]: With dead ends: 87077 [2021-06-05 16:48:45,467 INFO L226 Difference]: Without dead ends: 86965 [2021-06-05 16:48:45,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:48:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86965 states. [2021-06-05 16:48:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86965 to 86453. [2021-06-05 16:48:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86453 states, 86452 states have (on average 2.9423379447554714) internal successors, (254371), 86452 states have internal predecessors, (254371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86453 states to 86453 states and 254371 transitions. [2021-06-05 16:48:47,123 INFO L78 Accepts]: Start accepts. Automaton has 86453 states and 254371 transitions. Word has length 40 [2021-06-05 16:48:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:47,123 INFO L482 AbstractCegarLoop]: Abstraction has 86453 states and 254371 transitions. [2021-06-05 16:48:47,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 86453 states and 254371 transitions. [2021-06-05 16:48:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:47,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:47,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:47,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:47,463 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash 870160672, now seen corresponding path program 143 times [2021-06-05 16:48:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:47,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213023995] [2021-06-05 16:48:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:47,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:47,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213023995] [2021-06-05 16:48:47,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213023995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:47,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876378972] [2021-06-05 16:48:47,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:48:47,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:48:47,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:47,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876378972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:47,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:47,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 16:48:47,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416065375] [2021-06-05 16:48:47,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:48:47,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:48:47,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:48:47,815 INFO L87 Difference]: Start difference. First operand 86453 states and 254371 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:49,005 INFO L93 Difference]: Finished difference Result 91999 states and 270405 transitions. [2021-06-05 16:48:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:48:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:49,163 INFO L225 Difference]: With dead ends: 91999 [2021-06-05 16:48:49,163 INFO L226 Difference]: Without dead ends: 91867 [2021-06-05 16:48:49,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:48:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91867 states. [2021-06-05 16:48:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91867 to 87283. [2021-06-05 16:48:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87283 states, 87282 states have (on average 2.9414770513966224) internal successors, (256738), 87282 states have internal predecessors, (256738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87283 states to 87283 states and 256738 transitions. [2021-06-05 16:48:50,902 INFO L78 Accepts]: Start accepts. Automaton has 87283 states and 256738 transitions. Word has length 40 [2021-06-05 16:48:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:50,903 INFO L482 AbstractCegarLoop]: Abstraction has 87283 states and 256738 transitions. [2021-06-05 16:48:50,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 87283 states and 256738 transitions. [2021-06-05 16:48:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:51,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:51,024 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:51,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 16:48:51,224 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:51,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash -674180934, now seen corresponding path program 144 times [2021-06-05 16:48:51,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:51,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581569611] [2021-06-05 16:48:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:51,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581569611] [2021-06-05 16:48:51,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581569611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529157893] [2021-06-05 16:48:51,318 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 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 [2021-06-05 16:48:51,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:48:51,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:51,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529157893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:51,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:51,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 16:48:51,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289142684] [2021-06-05 16:48:51,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:48:51,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:51,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:48:51,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:48:51,549 INFO L87 Difference]: Start difference. First operand 87283 states and 256738 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:52,384 INFO L93 Difference]: Finished difference Result 89515 states and 263099 transitions. [2021-06-05 16:48:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:48:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:52,546 INFO L225 Difference]: With dead ends: 89515 [2021-06-05 16:48:52,546 INFO L226 Difference]: Without dead ends: 89401 [2021-06-05 16:48:52,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:48:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89401 states. [2021-06-05 16:48:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89401 to 82167. [2021-06-05 16:48:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82167 states, 82166 states have (on average 2.9420198135481828) internal successors, (241734), 82166 states have internal predecessors, (241734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82167 states to 82167 states and 241734 transitions. [2021-06-05 16:48:54,168 INFO L78 Accepts]: Start accepts. Automaton has 82167 states and 241734 transitions. Word has length 40 [2021-06-05 16:48:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:54,168 INFO L482 AbstractCegarLoop]: Abstraction has 82167 states and 241734 transitions. [2021-06-05 16:48:54,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 82167 states and 241734 transitions. [2021-06-05 16:48:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:54,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:54,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:54,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 16:48:54,481 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1896894304, now seen corresponding path program 145 times [2021-06-05 16:48:54,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:54,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420104665] [2021-06-05 16:48:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:54,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:54,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420104665] [2021-06-05 16:48:54,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420104665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286994073] [2021-06-05 16:48:54,559 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 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 [2021-06-05 16:48:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:55,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286994073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:55,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:55,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 16:48:55,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312815145] [2021-06-05 16:48:55,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:55,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:55,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:55,213 INFO L87 Difference]: Start difference. First operand 82167 states and 241734 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:55,691 INFO L93 Difference]: Finished difference Result 88605 states and 260666 transitions. [2021-06-05 16:48:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:48:55,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:55,850 INFO L225 Difference]: With dead ends: 88605 [2021-06-05 16:48:55,850 INFO L226 Difference]: Without dead ends: 88523 [2021-06-05 16:48:55,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 623.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:48:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88523 states. [2021-06-05 16:48:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88523 to 87987. [2021-06-05 16:48:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87987 states, 87986 states have (on average 2.944263860159571) internal successors, (259054), 87986 states have internal predecessors, (259054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87987 states to 87987 states and 259054 transitions. [2021-06-05 16:48:57,501 INFO L78 Accepts]: Start accepts. Automaton has 87987 states and 259054 transitions. Word has length 40 [2021-06-05 16:48:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:57,501 INFO L482 AbstractCegarLoop]: Abstraction has 87987 states and 259054 transitions. [2021-06-05 16:48:57,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 87987 states and 259054 transitions. [2021-06-05 16:48:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:48:57,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:57,977 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:58,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 16:48:58,197 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1777811292, now seen corresponding path program 146 times [2021-06-05 16:48:58,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:58,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745048246] [2021-06-05 16:48:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:48:58,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745048246] [2021-06-05 16:48:58,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745048246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849217438] [2021-06-05 16:48:58,273 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 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 [2021-06-05 16:48:58,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:48:58,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:48:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:58,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849217438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:58,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:58,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 16:48:58,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624715099] [2021-06-05 16:48:58,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:58,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:58,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:58,494 INFO L87 Difference]: Start difference. First operand 87987 states and 259054 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:58,956 INFO L93 Difference]: Finished difference Result 88582 states and 260614 transitions. [2021-06-05 16:48:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:48:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:48:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:59,113 INFO L225 Difference]: With dead ends: 88582 [2021-06-05 16:48:59,113 INFO L226 Difference]: Without dead ends: 88470 [2021-06-05 16:48:59,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:48:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88470 states. [2021-06-05 16:49:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88470 to 86373. [2021-06-05 16:49:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86373 states, 86372 states have (on average 2.942354003612282) internal successors, (254137), 86372 states have internal predecessors, (254137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86373 states to 86373 states and 254137 transitions. [2021-06-05 16:49:01,107 INFO L78 Accepts]: Start accepts. Automaton has 86373 states and 254137 transitions. Word has length 40 [2021-06-05 16:49:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:01,107 INFO L482 AbstractCegarLoop]: Abstraction has 86373 states and 254137 transitions. [2021-06-05 16:49:01,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 86373 states and 254137 transitions. [2021-06-05 16:49:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:49:01,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:01,238 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:01,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 16:49:01,438 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:01,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:01,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1922098874, now seen corresponding path program 147 times [2021-06-05 16:49:01,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:01,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800873072] [2021-06-05 16:49:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:49:01,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:01,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800873072] [2021-06-05 16:49:01,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800873072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:01,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330955928] [2021-06-05 16:49:01,539 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 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 [2021-06-05 16:49:01,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:49:01,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:49:01,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:01,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330955928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:01,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:01,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-06-05 16:49:01,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752655728] [2021-06-05 16:49:01,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:49:01,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:49:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:49:01,800 INFO L87 Difference]: Start difference. First operand 86373 states and 254137 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:02,335 INFO L93 Difference]: Finished difference Result 88556 states and 260312 transitions. [2021-06-05 16:49:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:49:02,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:49:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:02,478 INFO L225 Difference]: With dead ends: 88556 [2021-06-05 16:49:02,478 INFO L226 Difference]: Without dead ends: 88432 [2021-06-05 16:49:02,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:49:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88432 states. [2021-06-05 16:49:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88432 to 87931. [2021-06-05 16:49:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.943682474695781) internal successors, (258838), 87930 states have internal predecessors, (258838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 258838 transitions. [2021-06-05 16:49:04,502 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 258838 transitions. Word has length 40 [2021-06-05 16:49:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:04,502 INFO L482 AbstractCegarLoop]: Abstraction has 87931 states and 258838 transitions. [2021-06-05 16:49:04,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 258838 transitions. [2021-06-05 16:49:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:49:04,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:04,632 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:04,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:04,832 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:04,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:04,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1373433222, now seen corresponding path program 148 times [2021-06-05 16:49:04,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:04,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793781641] [2021-06-05 16:49:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:49:04,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:04,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793781641] [2021-06-05 16:49:04,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793781641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:04,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052783669] [2021-06-05 16:49:04,945 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 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 [2021-06-05 16:49:04,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:49:04,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:49:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:05,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052783669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:05,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:05,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 16:49:05,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672929592] [2021-06-05 16:49:05,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:49:05,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:49:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:49:05,227 INFO L87 Difference]: Start difference. First operand 87931 states and 258838 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:05,732 INFO L93 Difference]: Finished difference Result 88462 states and 260034 transitions. [2021-06-05 16:49:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:49:05,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:49:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:05,892 INFO L225 Difference]: With dead ends: 88462 [2021-06-05 16:49:05,892 INFO L226 Difference]: Without dead ends: 88332 [2021-06-05 16:49:05,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:49:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88332 states. [2021-06-05 16:49:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88332 to 87915. [2021-06-05 16:49:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87915 states, 87914 states have (on average 2.9437177241395) internal successors, (258794), 87914 states have internal predecessors, (258794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87915 states to 87915 states and 258794 transitions. [2021-06-05 16:49:07,999 INFO L78 Accepts]: Start accepts. Automaton has 87915 states and 258794 transitions. Word has length 40 [2021-06-05 16:49:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:07,999 INFO L482 AbstractCegarLoop]: Abstraction has 87915 states and 258794 transitions. [2021-06-05 16:49:08,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 87915 states and 258794 transitions. [2021-06-05 16:49:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 16:49:08,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:08,129 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:08,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 16:49:08,329 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 87314106, now seen corresponding path program 149 times [2021-06-05 16:49:08,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:08,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183555278] [2021-06-05 16:49:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:08,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:08,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183555278] [2021-06-05 16:49:08,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183555278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:08,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366696549] [2021-06-05 16:49:08,463 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 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 [2021-06-05 16:49:08,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:49:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:08,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:49:08,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:08,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366696549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:08,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:08,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:49:08,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135970805] [2021-06-05 16:49:08,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:49:08,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:08,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:49:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:49:08,725 INFO L87 Difference]: Start difference. First operand 87915 states and 258794 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:09,190 INFO L93 Difference]: Finished difference Result 88421 states and 259928 transitions. [2021-06-05 16:49:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:49:09,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 16:49:09,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:09,349 INFO L225 Difference]: With dead ends: 88421 [2021-06-05 16:49:09,349 INFO L226 Difference]: Without dead ends: 88345 [2021-06-05 16:49:09,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:49:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88345 states. [2021-06-05 16:49:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88345 to 81541. [2021-06-05 16:49:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81541 states, 81540 states have (on average 2.944432180524896) internal successors, (240089), 81540 states have internal predecessors, (240089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81541 states to 81541 states and 240089 transitions. [2021-06-05 16:49:11,253 INFO L78 Accepts]: Start accepts. Automaton has 81541 states and 240089 transitions. Word has length 40 [2021-06-05 16:49:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:11,253 INFO L482 AbstractCegarLoop]: Abstraction has 81541 states and 240089 transitions. [2021-06-05 16:49:11,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 81541 states and 240089 transitions. [2021-06-05 16:49:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:11,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:11,372 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:11,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 16:49:11,573 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1013579830, now seen corresponding path program 150 times [2021-06-05 16:49:11,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:11,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281632430] [2021-06-05 16:49:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:11,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:11,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281632430] [2021-06-05 16:49:11,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281632430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:11,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416117053] [2021-06-05 16:49:11,615 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 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 [2021-06-05 16:49:11,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:49:11,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:11,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:11,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:11,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416117053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:11,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:11,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 16:49:11,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126881189] [2021-06-05 16:49:11,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:49:11,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:11,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:49:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:49:11,727 INFO L87 Difference]: Start difference. First operand 81541 states and 240089 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:12,266 INFO L93 Difference]: Finished difference Result 106475 states and 313342 transitions. [2021-06-05 16:49:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:49:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:12,474 INFO L225 Difference]: With dead ends: 106475 [2021-06-05 16:49:12,474 INFO L226 Difference]: Without dead ends: 106475 [2021-06-05 16:49:12,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:49:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106475 states. [2021-06-05 16:49:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106475 to 82605. [2021-06-05 16:49:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82605 states, 82604 states have (on average 2.9431504527625783) internal successors, (243116), 82604 states have internal predecessors, (243116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82605 states to 82605 states and 243116 transitions. [2021-06-05 16:49:14,682 INFO L78 Accepts]: Start accepts. Automaton has 82605 states and 243116 transitions. Word has length 43 [2021-06-05 16:49:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:14,682 INFO L482 AbstractCegarLoop]: Abstraction has 82605 states and 243116 transitions. [2021-06-05 16:49:14,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 82605 states and 243116 transitions. [2021-06-05 16:49:14,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:14,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:14,799 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:14,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 16:49:15,000 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash -22106132, now seen corresponding path program 151 times [2021-06-05 16:49:15,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:15,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785629085] [2021-06-05 16:49:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:15,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:15,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785629085] [2021-06-05 16:49:15,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785629085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:15,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572822689] [2021-06-05 16:49:15,042 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 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 [2021-06-05 16:49:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:15,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572822689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:15,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:15,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 16:49:15,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929051088] [2021-06-05 16:49:15,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:49:15,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:49:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:49:15,154 INFO L87 Difference]: Start difference. First operand 82605 states and 243116 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:15,679 INFO L93 Difference]: Finished difference Result 128181 states and 373839 transitions. [2021-06-05 16:49:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:49:15,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:16,374 INFO L225 Difference]: With dead ends: 128181 [2021-06-05 16:49:16,374 INFO L226 Difference]: Without dead ends: 128094 [2021-06-05 16:49:16,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:49:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128094 states. [2021-06-05 16:49:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128094 to 82605. [2021-06-05 16:49:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82605 states, 82604 states have (on average 2.943017287298436) internal successors, (243105), 82604 states have internal predecessors, (243105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82605 states to 82605 states and 243105 transitions. [2021-06-05 16:49:18,279 INFO L78 Accepts]: Start accepts. Automaton has 82605 states and 243105 transitions. Word has length 43 [2021-06-05 16:49:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:18,279 INFO L482 AbstractCegarLoop]: Abstraction has 82605 states and 243105 transitions. [2021-06-05 16:49:18,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 82605 states and 243105 transitions. [2021-06-05 16:49:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:18,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:18,400 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:18,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:18,601 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1136369384, now seen corresponding path program 152 times [2021-06-05 16:49:18,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:18,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094235125] [2021-06-05 16:49:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:18,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:18,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094235125] [2021-06-05 16:49:18,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094235125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:18,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854116921] [2021-06-05 16:49:18,641 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 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 [2021-06-05 16:49:18,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:49:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:18,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:18,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854116921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:18,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:18,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:49:18,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53914723] [2021-06-05 16:49:18,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:18,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:18,793 INFO L87 Difference]: Start difference. First operand 82605 states and 243105 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:20,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:20,376 INFO L93 Difference]: Finished difference Result 145421 states and 423333 transitions. [2021-06-05 16:49:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:49:20,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:20,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:20,653 INFO L225 Difference]: With dead ends: 145421 [2021-06-05 16:49:20,653 INFO L226 Difference]: Without dead ends: 145391 [2021-06-05 16:49:20,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 645.7ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:49:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145391 states. [2021-06-05 16:49:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145391 to 98900. [2021-06-05 16:49:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98900 states, 98899 states have (on average 2.952426212600734) internal successors, (291992), 98899 states have internal predecessors, (291992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98900 states to 98900 states and 291992 transitions. [2021-06-05 16:49:23,377 INFO L78 Accepts]: Start accepts. Automaton has 98900 states and 291992 transitions. Word has length 43 [2021-06-05 16:49:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:23,377 INFO L482 AbstractCegarLoop]: Abstraction has 98900 states and 291992 transitions. [2021-06-05 16:49:23,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 98900 states and 291992 transitions. [2021-06-05 16:49:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:23,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:23,507 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:23,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 16:49:23,708 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash 925672338, now seen corresponding path program 153 times [2021-06-05 16:49:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:23,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562834239] [2021-06-05 16:49:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:23,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:23,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562834239] [2021-06-05 16:49:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562834239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:23,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123296205] [2021-06-05 16:49:23,749 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 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 [2021-06-05 16:49:23,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:49:23,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:23,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123296205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:23,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:23,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:49:23,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080311485] [2021-06-05 16:49:23,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:23,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:23,875 INFO L87 Difference]: Start difference. First operand 98900 states and 291992 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:25,185 INFO L93 Difference]: Finished difference Result 115582 states and 339026 transitions. [2021-06-05 16:49:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:49:25,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:25,412 INFO L225 Difference]: With dead ends: 115582 [2021-06-05 16:49:25,412 INFO L226 Difference]: Without dead ends: 115570 [2021-06-05 16:49:25,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:49:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115570 states. [2021-06-05 16:49:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115570 to 102024. [2021-06-05 16:49:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102024 states, 102023 states have (on average 2.9566078237260225) internal successors, (301642), 102023 states have internal predecessors, (301642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102024 states to 102024 states and 301642 transitions. [2021-06-05 16:49:28,217 INFO L78 Accepts]: Start accepts. Automaton has 102024 states and 301642 transitions. Word has length 43 [2021-06-05 16:49:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:28,218 INFO L482 AbstractCegarLoop]: Abstraction has 102024 states and 301642 transitions. [2021-06-05 16:49:28,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 102024 states and 301642 transitions. [2021-06-05 16:49:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:28,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:28,396 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:28,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:28,619 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1654424156, now seen corresponding path program 154 times [2021-06-05 16:49:28,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:28,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252167346] [2021-06-05 16:49:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:28,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:28,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252167346] [2021-06-05 16:49:28,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252167346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:28,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351509147] [2021-06-05 16:49:28,660 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 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 [2021-06-05 16:49:28,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:49:28,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:28,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:28,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:28,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351509147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:28,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:28,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:49:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696297863] [2021-06-05 16:49:28,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:28,780 INFO L87 Difference]: Start difference. First operand 102024 states and 301642 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:30,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:30,319 INFO L93 Difference]: Finished difference Result 117555 states and 344061 transitions. [2021-06-05 16:49:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:49:30,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:30,552 INFO L225 Difference]: With dead ends: 117555 [2021-06-05 16:49:30,553 INFO L226 Difference]: Without dead ends: 117555 [2021-06-05 16:49:30,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:49:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117555 states. [2021-06-05 16:49:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117555 to 94698. [2021-06-05 16:49:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94698 states, 94697 states have (on average 2.949797776064712) internal successors, (279337), 94697 states have internal predecessors, (279337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94698 states to 94698 states and 279337 transitions. [2021-06-05 16:49:32,919 INFO L78 Accepts]: Start accepts. Automaton has 94698 states and 279337 transitions. Word has length 43 [2021-06-05 16:49:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:32,919 INFO L482 AbstractCegarLoop]: Abstraction has 94698 states and 279337 transitions. [2021-06-05 16:49:32,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 94698 states and 279337 transitions. [2021-06-05 16:49:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:33,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:33,050 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:33,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:33,250 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:33,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1277453002, now seen corresponding path program 155 times [2021-06-05 16:49:33,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:33,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399606324] [2021-06-05 16:49:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:33,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399606324] [2021-06-05 16:49:33,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399606324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264117722] [2021-06-05 16:49:33,310 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 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 [2021-06-05 16:49:33,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:49:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:33,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:33,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264117722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:33,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:33,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:49:33,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969683301] [2021-06-05 16:49:33,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:33,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:33,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:33,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:33,439 INFO L87 Difference]: Start difference. First operand 94698 states and 279337 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:34,379 INFO L93 Difference]: Finished difference Result 139702 states and 406719 transitions. [2021-06-05 16:49:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:49:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:35,106 INFO L225 Difference]: With dead ends: 139702 [2021-06-05 16:49:35,106 INFO L226 Difference]: Without dead ends: 139688 [2021-06-05 16:49:35,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:49:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139688 states. [2021-06-05 16:49:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139688 to 87080. [2021-06-05 16:49:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87080 states, 87079 states have (on average 2.938527084601339) internal successors, (255884), 87079 states have internal predecessors, (255884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87080 states to 87080 states and 255884 transitions. [2021-06-05 16:49:37,729 INFO L78 Accepts]: Start accepts. Automaton has 87080 states and 255884 transitions. Word has length 43 [2021-06-05 16:49:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:37,729 INFO L482 AbstractCegarLoop]: Abstraction has 87080 states and 255884 transitions. [2021-06-05 16:49:37,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 87080 states and 255884 transitions. [2021-06-05 16:49:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:37,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:37,854 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:38,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:38,055 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1361851776, now seen corresponding path program 156 times [2021-06-05 16:49:38,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:38,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114133104] [2021-06-05 16:49:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:38,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:38,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114133104] [2021-06-05 16:49:38,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114133104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:38,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055124811] [2021-06-05 16:49:38,095 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 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 [2021-06-05 16:49:38,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:49:38,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:38,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:38,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:38,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055124811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:38,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:38,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:49:38,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998495501] [2021-06-05 16:49:38,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:38,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:38,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:38,238 INFO L87 Difference]: Start difference. First operand 87080 states and 255884 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:39,149 INFO L93 Difference]: Finished difference Result 134788 states and 392170 transitions. [2021-06-05 16:49:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:49:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:39,432 INFO L225 Difference]: With dead ends: 134788 [2021-06-05 16:49:39,432 INFO L226 Difference]: Without dead ends: 134732 [2021-06-05 16:49:39,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:49:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134732 states. [2021-06-05 16:49:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134732 to 88260. [2021-06-05 16:49:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88260 states, 88259 states have (on average 2.9363804257922705) internal successors, (259162), 88259 states have internal predecessors, (259162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88260 states to 88260 states and 259162 transitions. [2021-06-05 16:49:41,968 INFO L78 Accepts]: Start accepts. Automaton has 88260 states and 259162 transitions. Word has length 43 [2021-06-05 16:49:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:41,968 INFO L482 AbstractCegarLoop]: Abstraction has 88260 states and 259162 transitions. [2021-06-05 16:49:41,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 88260 states and 259162 transitions. [2021-06-05 16:49:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:42,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:42,079 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:42,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:42,279 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1293078010, now seen corresponding path program 157 times [2021-06-05 16:49:42,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:42,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110708108] [2021-06-05 16:49:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:42,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:42,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110708108] [2021-06-05 16:49:42,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110708108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:42,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008713961] [2021-06-05 16:49:42,320 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 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 [2021-06-05 16:49:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:42,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:42,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008713961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:42,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:42,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:49:42,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154454158] [2021-06-05 16:49:42,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:42,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:42,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:42,443 INFO L87 Difference]: Start difference. First operand 88260 states and 259162 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:42,944 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 16:49:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:43,619 INFO L93 Difference]: Finished difference Result 137498 states and 399912 transitions. [2021-06-05 16:49:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:49:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:43,887 INFO L225 Difference]: With dead ends: 137498 [2021-06-05 16:49:43,887 INFO L226 Difference]: Without dead ends: 137400 [2021-06-05 16:49:43,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:49:44,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137400 states. [2021-06-05 16:49:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137400 to 89196. [2021-06-05 16:49:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89196 states, 89195 states have (on average 2.935433600538147) internal successors, (261826), 89195 states have internal predecessors, (261826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89196 states to 89196 states and 261826 transitions. [2021-06-05 16:49:46,366 INFO L78 Accepts]: Start accepts. Automaton has 89196 states and 261826 transitions. Word has length 43 [2021-06-05 16:49:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:46,366 INFO L482 AbstractCegarLoop]: Abstraction has 89196 states and 261826 transitions. [2021-06-05 16:49:46,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 89196 states and 261826 transitions. [2021-06-05 16:49:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:46,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:46,495 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:46,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:46,697 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:46,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:46,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1811390400, now seen corresponding path program 158 times [2021-06-05 16:49:46,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:46,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389331019] [2021-06-05 16:49:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:46,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:46,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389331019] [2021-06-05 16:49:46,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389331019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:46,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355800948] [2021-06-05 16:49:46,740 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 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 [2021-06-05 16:49:46,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:49:46,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:46,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:46,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355800948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:46,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:46,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:49:46,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75117264] [2021-06-05 16:49:46,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:46,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:46,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:46,863 INFO L87 Difference]: Start difference. First operand 89196 states and 261826 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:48,054 INFO L93 Difference]: Finished difference Result 130434 states and 379264 transitions. [2021-06-05 16:49:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:49:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:48,357 INFO L225 Difference]: With dead ends: 130434 [2021-06-05 16:49:48,358 INFO L226 Difference]: Without dead ends: 130364 [2021-06-05 16:49:48,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:49:48,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130364 states. [2021-06-05 16:49:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130364 to 89196. [2021-06-05 16:49:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89196 states, 89195 states have (on average 2.9345142664947588) internal successors, (261744), 89195 states have internal predecessors, (261744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89196 states to 89196 states and 261744 transitions. [2021-06-05 16:49:50,902 INFO L78 Accepts]: Start accepts. Automaton has 89196 states and 261744 transitions. Word has length 43 [2021-06-05 16:49:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:50,902 INFO L482 AbstractCegarLoop]: Abstraction has 89196 states and 261744 transitions. [2021-06-05 16:49:50,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 89196 states and 261744 transitions. [2021-06-05 16:49:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:51,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:51,020 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:51,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 16:49:51,221 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:51,221 INFO L82 PathProgramCache]: Analyzing trace with hash -939318, now seen corresponding path program 159 times [2021-06-05 16:49:51,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:51,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45943453] [2021-06-05 16:49:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:51,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:51,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45943453] [2021-06-05 16:49:51,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45943453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:51,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264429811] [2021-06-05 16:49:51,267 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 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 [2021-06-05 16:49:51,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:49:51,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:51,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:51,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264429811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:51,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:51,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:49:51,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757364250] [2021-06-05 16:49:51,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:49:51,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:51,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:49:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:49:51,396 INFO L87 Difference]: Start difference. First operand 89196 states and 261744 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:52,283 INFO L93 Difference]: Finished difference Result 104528 states and 305186 transitions. [2021-06-05 16:49:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:49:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:52,490 INFO L225 Difference]: With dead ends: 104528 [2021-06-05 16:49:52,490 INFO L226 Difference]: Without dead ends: 104468 [2021-06-05 16:49:52,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:49:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104468 states. [2021-06-05 16:49:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104468 to 92172. [2021-06-05 16:49:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92172 states, 92171 states have (on average 2.933634223345738) internal successors, (270396), 92171 states have internal predecessors, (270396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92172 states to 92172 states and 270396 transitions. [2021-06-05 16:49:54,785 INFO L78 Accepts]: Start accepts. Automaton has 92172 states and 270396 transitions. Word has length 43 [2021-06-05 16:49:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:54,785 INFO L482 AbstractCegarLoop]: Abstraction has 92172 states and 270396 transitions. [2021-06-05 16:49:54,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 92172 states and 270396 transitions. [2021-06-05 16:49:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:54,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:54,903 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:55,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 16:49:55,104 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:55,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:55,104 INFO L82 PathProgramCache]: Analyzing trace with hash 415720322, now seen corresponding path program 160 times [2021-06-05 16:49:55,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:55,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169700130] [2021-06-05 16:49:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:55,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169700130] [2021-06-05 16:49:55,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169700130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300123757] [2021-06-05 16:49:55,140 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 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 [2021-06-05 16:49:55,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:49:55,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:55,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:55,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300123757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:55,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:55,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:49:55,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88179689] [2021-06-05 16:49:55,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:55,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:55,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:55,262 INFO L87 Difference]: Start difference. First operand 92172 states and 270396 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:56,728 INFO L93 Difference]: Finished difference Result 107768 states and 313292 transitions. [2021-06-05 16:49:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:49:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:49:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:56,932 INFO L225 Difference]: With dead ends: 107768 [2021-06-05 16:49:56,932 INFO L226 Difference]: Without dead ends: 107740 [2021-06-05 16:49:56,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:49:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107740 states. [2021-06-05 16:49:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107740 to 86702. [2021-06-05 16:49:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86702 states, 86701 states have (on average 2.93416454250816) internal successors, (254395), 86701 states have internal predecessors, (254395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86702 states to 86702 states and 254395 transitions. [2021-06-05 16:49:59,281 INFO L78 Accepts]: Start accepts. Automaton has 86702 states and 254395 transitions. Word has length 43 [2021-06-05 16:49:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:59,281 INFO L482 AbstractCegarLoop]: Abstraction has 86702 states and 254395 transitions. [2021-06-05 16:49:59,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 86702 states and 254395 transitions. [2021-06-05 16:49:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:49:59,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:59,400 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:59,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 16:49:59,601 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -976949870, now seen corresponding path program 161 times [2021-06-05 16:49:59,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:59,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337027926] [2021-06-05 16:49:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:59,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:59,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337027926] [2021-06-05 16:49:59,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337027926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:59,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926380904] [2021-06-05 16:49:59,643 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 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 [2021-06-05 16:49:59,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 16:49:59,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:59,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:49:59,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:59,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926380904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:59,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:59,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:49:59,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273823998] [2021-06-05 16:49:59,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:49:59,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:59,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:49:59,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:49:59,783 INFO L87 Difference]: Start difference. First operand 86702 states and 254395 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:00,717 INFO L93 Difference]: Finished difference Result 106763 states and 310618 transitions. [2021-06-05 16:50:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:50:00,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:00,910 INFO L225 Difference]: With dead ends: 106763 [2021-06-05 16:50:00,911 INFO L226 Difference]: Without dead ends: 106625 [2021-06-05 16:50:00,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:50:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106625 states. [2021-06-05 16:50:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106625 to 89334. [2021-06-05 16:50:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89334 states, 89333 states have (on average 2.9301042168067792) internal successors, (261755), 89333 states have internal predecessors, (261755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89334 states to 89334 states and 261755 transitions. [2021-06-05 16:50:03,232 INFO L78 Accepts]: Start accepts. Automaton has 89334 states and 261755 transitions. Word has length 43 [2021-06-05 16:50:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:03,232 INFO L482 AbstractCegarLoop]: Abstraction has 89334 states and 261755 transitions. [2021-06-05 16:50:03,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 89334 states and 261755 transitions. [2021-06-05 16:50:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:03,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:03,364 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:03,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:03,565 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash -725487968, now seen corresponding path program 162 times [2021-06-05 16:50:03,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:03,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708720970] [2021-06-05 16:50:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:03,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:03,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708720970] [2021-06-05 16:50:03,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708720970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:03,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55163836] [2021-06-05 16:50:03,596 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 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 [2021-06-05 16:50:03,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:50:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:03,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:03,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55163836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:03,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:03,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 16:50:03,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220512299] [2021-06-05 16:50:03,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:03,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:03,729 INFO L87 Difference]: Start difference. First operand 89334 states and 261755 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 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) [2021-06-05 16:50:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:05,211 INFO L93 Difference]: Finished difference Result 113867 states and 330296 transitions. [2021-06-05 16:50:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:50:05,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 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) Word has length 43 [2021-06-05 16:50:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:05,442 INFO L225 Difference]: With dead ends: 113867 [2021-06-05 16:50:05,442 INFO L226 Difference]: Without dead ends: 113832 [2021-06-05 16:50:05,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:50:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113832 states. [2021-06-05 16:50:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113832 to 94432. [2021-06-05 16:50:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94432 states, 94431 states have (on average 2.931727928328621) internal successors, (276846), 94431 states have internal predecessors, (276846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94432 states to 94432 states and 276846 transitions. [2021-06-05 16:50:07,878 INFO L78 Accepts]: Start accepts. Automaton has 94432 states and 276846 transitions. Word has length 43 [2021-06-05 16:50:07,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:07,878 INFO L482 AbstractCegarLoop]: Abstraction has 94432 states and 276846 transitions. [2021-06-05 16:50:07,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 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) [2021-06-05 16:50:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 94432 states and 276846 transitions. [2021-06-05 16:50:08,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:08,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:08,022 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:08,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 16:50:08,222 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -378710582, now seen corresponding path program 163 times [2021-06-05 16:50:08,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:08,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005905076] [2021-06-05 16:50:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:08,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:08,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005905076] [2021-06-05 16:50:08,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005905076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:08,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753691820] [2021-06-05 16:50:08,266 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 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 [2021-06-05 16:50:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:08,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:08,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753691820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:08,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:08,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:50:08,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216110879] [2021-06-05 16:50:08,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:50:08,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:50:08,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:50:08,419 INFO L87 Difference]: Start difference. First operand 94432 states and 276846 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:09,880 INFO L93 Difference]: Finished difference Result 114703 states and 333022 transitions. [2021-06-05 16:50:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:50:09,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:10,095 INFO L225 Difference]: With dead ends: 114703 [2021-06-05 16:50:10,095 INFO L226 Difference]: Without dead ends: 114511 [2021-06-05 16:50:10,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 554.0ms TimeCoverageRelationStatistics Valid=1034, Invalid=2748, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:50:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114511 states. [2021-06-05 16:50:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114511 to 99458. [2021-06-05 16:50:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99458 states, 99457 states have (on average 2.9280090893551987) internal successors, (291211), 99457 states have internal predecessors, (291211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99458 states to 99458 states and 291211 transitions. [2021-06-05 16:50:12,701 INFO L78 Accepts]: Start accepts. Automaton has 99458 states and 291211 transitions. Word has length 43 [2021-06-05 16:50:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:12,701 INFO L482 AbstractCegarLoop]: Abstraction has 99458 states and 291211 transitions. [2021-06-05 16:50:12,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 99458 states and 291211 transitions. [2021-06-05 16:50:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:12,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:12,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:13,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:13,024 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash 499459778, now seen corresponding path program 164 times [2021-06-05 16:50:13,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:13,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47279787] [2021-06-05 16:50:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:13,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:13,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47279787] [2021-06-05 16:50:13,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47279787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:13,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514242577] [2021-06-05 16:50:13,051 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 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 [2021-06-05 16:50:13,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:13,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:13,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:13,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:13,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514242577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:13,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:13,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 16:50:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319164691] [2021-06-05 16:50:13,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:13,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:13,188 INFO L87 Difference]: Start difference. First operand 99458 states and 291211 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:14,781 INFO L93 Difference]: Finished difference Result 134026 states and 389085 transitions. [2021-06-05 16:50:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:50:14,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:15,053 INFO L225 Difference]: With dead ends: 134026 [2021-06-05 16:50:15,053 INFO L226 Difference]: Without dead ends: 133998 [2021-06-05 16:50:15,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 590.7ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:50:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133998 states. [2021-06-05 16:50:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133998 to 114908. [2021-06-05 16:50:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114908 states, 114907 states have (on average 2.922328491736796) internal successors, (335796), 114907 states have internal predecessors, (335796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114908 states to 114908 states and 335796 transitions. [2021-06-05 16:50:17,759 INFO L78 Accepts]: Start accepts. Automaton has 114908 states and 335796 transitions. Word has length 43 [2021-06-05 16:50:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:17,759 INFO L482 AbstractCegarLoop]: Abstraction has 114908 states and 335796 transitions. [2021-06-05 16:50:17,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 114908 states and 335796 transitions. [2021-06-05 16:50:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:17,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:17,940 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:18,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:18,141 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash 223084418, now seen corresponding path program 165 times [2021-06-05 16:50:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:18,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64093061] [2021-06-05 16:50:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:18,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:18,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64093061] [2021-06-05 16:50:18,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64093061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:18,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853748302] [2021-06-05 16:50:18,183 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 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 [2021-06-05 16:50:18,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:50:18,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:18,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:18,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853748302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:18,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:18,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 16:50:18,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145143535] [2021-06-05 16:50:18,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:18,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:18,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:18,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:18,305 INFO L87 Difference]: Start difference. First operand 114908 states and 335796 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:19,468 INFO L93 Difference]: Finished difference Result 127931 states and 372783 transitions. [2021-06-05 16:50:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:50:19,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:19,726 INFO L225 Difference]: With dead ends: 127931 [2021-06-05 16:50:19,727 INFO L226 Difference]: Without dead ends: 127931 [2021-06-05 16:50:19,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:50:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127931 states. [2021-06-05 16:50:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127931 to 115940. [2021-06-05 16:50:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115940 states, 115939 states have (on average 2.9225368512752397) internal successors, (338836), 115939 states have internal predecessors, (338836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115940 states to 115940 states and 338836 transitions. [2021-06-05 16:50:22,361 INFO L78 Accepts]: Start accepts. Automaton has 115940 states and 338836 transitions. Word has length 43 [2021-06-05 16:50:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:22,361 INFO L482 AbstractCegarLoop]: Abstraction has 115940 states and 338836 transitions. [2021-06-05 16:50:22,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 115940 states and 338836 transitions. [2021-06-05 16:50:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:22,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:22,515 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:22,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:22,716 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1001606290, now seen corresponding path program 166 times [2021-06-05 16:50:22,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:22,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999436769] [2021-06-05 16:50:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:22,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:22,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999436769] [2021-06-05 16:50:22,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999436769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:22,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125924595] [2021-06-05 16:50:22,763 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 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 [2021-06-05 16:50:22,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:22,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:22,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:22,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125924595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:22,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:22,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 16:50:22,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250555315] [2021-06-05 16:50:22,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:22,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:22,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:22,911 INFO L87 Difference]: Start difference. First operand 115940 states and 338836 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:23,445 INFO L93 Difference]: Finished difference Result 136802 states and 396449 transitions. [2021-06-05 16:50:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:50:23,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:24,279 INFO L225 Difference]: With dead ends: 136802 [2021-06-05 16:50:24,279 INFO L226 Difference]: Without dead ends: 136730 [2021-06-05 16:50:24,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:50:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136730 states. [2021-06-05 16:50:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136730 to 115940. [2021-06-05 16:50:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115940 states, 115939 states have (on average 2.9224333485712313) internal successors, (338824), 115939 states have internal predecessors, (338824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115940 states to 115940 states and 338824 transitions. [2021-06-05 16:50:26,977 INFO L78 Accepts]: Start accepts. Automaton has 115940 states and 338824 transitions. Word has length 43 [2021-06-05 16:50:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:26,977 INFO L482 AbstractCegarLoop]: Abstraction has 115940 states and 338824 transitions. [2021-06-05 16:50:26,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 115940 states and 338824 transitions. [2021-06-05 16:50:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:27,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:27,145 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:27,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2021-06-05 16:50:27,345 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash 5413476, now seen corresponding path program 167 times [2021-06-05 16:50:27,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:27,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042781681] [2021-06-05 16:50:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:27,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042781681] [2021-06-05 16:50:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042781681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226325201] [2021-06-05 16:50:27,388 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 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 [2021-06-05 16:50:27,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:50:27,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:27,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:27,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226325201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:27,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:27,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:50:27,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720622378] [2021-06-05 16:50:27,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:27,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:27,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:27,506 INFO L87 Difference]: Start difference. First operand 115940 states and 338824 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:28,165 INFO L93 Difference]: Finished difference Result 126431 states and 367544 transitions. [2021-06-05 16:50:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:50:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:28,421 INFO L225 Difference]: With dead ends: 126431 [2021-06-05 16:50:28,422 INFO L226 Difference]: Without dead ends: 126431 [2021-06-05 16:50:28,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:50:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126431 states. [2021-06-05 16:50:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126431 to 116842. [2021-06-05 16:50:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116842 states, 116841 states have (on average 2.9219109730317268) internal successors, (341399), 116841 states have internal predecessors, (341399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116842 states to 116842 states and 341399 transitions. [2021-06-05 16:50:31,132 INFO L78 Accepts]: Start accepts. Automaton has 116842 states and 341399 transitions. Word has length 43 [2021-06-05 16:50:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:31,132 INFO L482 AbstractCegarLoop]: Abstraction has 116842 states and 341399 transitions. [2021-06-05 16:50:31,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 116842 states and 341399 transitions. [2021-06-05 16:50:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:31,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:31,308 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:31,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:31,509 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1165282054, now seen corresponding path program 168 times [2021-06-05 16:50:31,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:31,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887394093] [2021-06-05 16:50:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:31,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:31,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887394093] [2021-06-05 16:50:31,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887394093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:31,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126226764] [2021-06-05 16:50:31,554 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 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 [2021-06-05 16:50:31,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:50:31,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:31,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:31,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126226764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:31,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:31,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:50:31,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454904170] [2021-06-05 16:50:31,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:31,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:31,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:31,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:31,678 INFO L87 Difference]: Start difference. First operand 116842 states and 341399 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:32,940 INFO L93 Difference]: Finished difference Result 138518 states and 400785 transitions. [2021-06-05 16:50:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:50:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:33,199 INFO L225 Difference]: With dead ends: 138518 [2021-06-05 16:50:33,199 INFO L226 Difference]: Without dead ends: 138458 [2021-06-05 16:50:33,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:50:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138458 states. [2021-06-05 16:50:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138458 to 120234. [2021-06-05 16:50:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120234 states, 120233 states have (on average 2.923947668277428) internal successors, (351555), 120233 states have internal predecessors, (351555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120234 states to 120234 states and 351555 transitions. [2021-06-05 16:50:36,601 INFO L78 Accepts]: Start accepts. Automaton has 120234 states and 351555 transitions. Word has length 43 [2021-06-05 16:50:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:36,601 INFO L482 AbstractCegarLoop]: Abstraction has 120234 states and 351555 transitions. [2021-06-05 16:50:36,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 120234 states and 351555 transitions. [2021-06-05 16:50:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:37,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:37,232 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:37,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 16:50:37,449 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:37,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1534575938, now seen corresponding path program 169 times [2021-06-05 16:50:37,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:37,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782245108] [2021-06-05 16:50:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:37,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:37,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782245108] [2021-06-05 16:50:37,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782245108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:37,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813169771] [2021-06-05 16:50:37,491 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 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 [2021-06-05 16:50:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:37,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813169771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:37,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:37,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:50:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410302373] [2021-06-05 16:50:37,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:37,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:37,610 INFO L87 Difference]: Start difference. First operand 120234 states and 351555 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:38,632 INFO L93 Difference]: Finished difference Result 137463 states and 399174 transitions. [2021-06-05 16:50:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:50:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:38,908 INFO L225 Difference]: With dead ends: 137463 [2021-06-05 16:50:38,908 INFO L226 Difference]: Without dead ends: 137463 [2021-06-05 16:50:38,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:50:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137463 states. [2021-06-05 16:50:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137463 to 123758. [2021-06-05 16:50:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123758 states, 123757 states have (on average 2.921378184668342) internal successors, (361541), 123757 states have internal predecessors, (361541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123758 states to 123758 states and 361541 transitions. [2021-06-05 16:50:41,792 INFO L78 Accepts]: Start accepts. Automaton has 123758 states and 361541 transitions. Word has length 43 [2021-06-05 16:50:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:41,792 INFO L482 AbstractCegarLoop]: Abstraction has 123758 states and 361541 transitions. [2021-06-05 16:50:41,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 123758 states and 361541 transitions. [2021-06-05 16:50:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:42,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:42,498 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:42,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 16:50:42,699 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:42,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:42,699 INFO L82 PathProgramCache]: Analyzing trace with hash -268885396, now seen corresponding path program 170 times [2021-06-05 16:50:42,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:42,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468743631] [2021-06-05 16:50:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:42,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468743631] [2021-06-05 16:50:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468743631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947503049] [2021-06-05 16:50:42,739 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 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 [2021-06-05 16:50:42,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:42,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:42,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:42,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947503049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:42,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:42,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:50:42,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971445145] [2021-06-05 16:50:42,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:42,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:42,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:42,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:42,864 INFO L87 Difference]: Start difference. First operand 123758 states and 361541 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:43,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:43,786 INFO L93 Difference]: Finished difference Result 164424 states and 477010 transitions. [2021-06-05 16:50:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:50:43,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:43,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:44,098 INFO L225 Difference]: With dead ends: 164424 [2021-06-05 16:50:44,099 INFO L226 Difference]: Without dead ends: 164340 [2021-06-05 16:50:44,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=497, Invalid=1573, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:50:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164340 states. [2021-06-05 16:50:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164340 to 139180. [2021-06-05 16:50:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139180 states, 139179 states have (on average 2.9166469079386976) internal successors, (405936), 139179 states have internal predecessors, (405936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139180 states to 139180 states and 405936 transitions. [2021-06-05 16:50:47,707 INFO L78 Accepts]: Start accepts. Automaton has 139180 states and 405936 transitions. Word has length 43 [2021-06-05 16:50:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:47,707 INFO L482 AbstractCegarLoop]: Abstraction has 139180 states and 405936 transitions. [2021-06-05 16:50:47,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 139180 states and 405936 transitions. [2021-06-05 16:50:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:47,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:47,915 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:48,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 16:50:48,116 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash -471353564, now seen corresponding path program 171 times [2021-06-05 16:50:48,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:48,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862991644] [2021-06-05 16:50:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:48,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:48,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862991644] [2021-06-05 16:50:48,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862991644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:48,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882378614] [2021-06-05 16:50:48,158 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 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 [2021-06-05 16:50:48,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:50:48,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:48,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:48,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:48,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882378614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:48,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:48,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:50:48,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312627639] [2021-06-05 16:50:48,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:48,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:48,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:48,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:48,279 INFO L87 Difference]: Start difference. First operand 139180 states and 405936 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:50,099 INFO L93 Difference]: Finished difference Result 166177 states and 481337 transitions. [2021-06-05 16:50:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:50:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:50,438 INFO L225 Difference]: With dead ends: 166177 [2021-06-05 16:50:50,438 INFO L226 Difference]: Without dead ends: 166177 [2021-06-05 16:50:50,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:50:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166177 states. [2021-06-05 16:50:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166177 to 144218. [2021-06-05 16:50:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144218 states, 144217 states have (on average 2.9188306510328186) internal successors, (420945), 144217 states have internal predecessors, (420945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144218 states to 144218 states and 420945 transitions. [2021-06-05 16:50:54,179 INFO L78 Accepts]: Start accepts. Automaton has 144218 states and 420945 transitions. Word has length 43 [2021-06-05 16:50:54,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:54,179 INFO L482 AbstractCegarLoop]: Abstraction has 144218 states and 420945 transitions. [2021-06-05 16:50:54,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 144218 states and 420945 transitions. [2021-06-05 16:50:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:50:54,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:54,392 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:54,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 16:50:54,592 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1895135802, now seen corresponding path program 172 times [2021-06-05 16:50:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:54,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926757803] [2021-06-05 16:50:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:54,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:54,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926757803] [2021-06-05 16:50:54,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926757803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:54,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803091504] [2021-06-05 16:50:54,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:50:54,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:54,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:54,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:50:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:54,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803091504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:54,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:54,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:50:54,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038698604] [2021-06-05 16:50:54,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:54,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:54,769 INFO L87 Difference]: Start difference. First operand 144218 states and 420945 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:56,370 INFO L93 Difference]: Finished difference Result 174051 states and 506409 transitions. [2021-06-05 16:50:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:50:56,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:50:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:56,728 INFO L225 Difference]: With dead ends: 174051 [2021-06-05 16:50:56,728 INFO L226 Difference]: Without dead ends: 173979 [2021-06-05 16:50:56,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:50:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173979 states. [2021-06-05 16:50:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173979 to 148690. [2021-06-05 16:51:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148690 states, 148689 states have (on average 2.920209295912946) internal successors, (434203), 148689 states have internal predecessors, (434203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148690 states to 148690 states and 434203 transitions. [2021-06-05 16:51:00,654 INFO L78 Accepts]: Start accepts. Automaton has 148690 states and 434203 transitions. Word has length 43 [2021-06-05 16:51:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:00,654 INFO L482 AbstractCegarLoop]: Abstraction has 148690 states and 434203 transitions. [2021-06-05 16:51:00,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 148690 states and 434203 transitions. [2021-06-05 16:51:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:00,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:00,889 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:01,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:01,090 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash 562421890, now seen corresponding path program 173 times [2021-06-05 16:51:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:01,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563446404] [2021-06-05 16:51:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:01,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:01,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563446404] [2021-06-05 16:51:01,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563446404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:01,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840867098] [2021-06-05 16:51:01,131 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 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 [2021-06-05 16:51:01,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:51:01,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:01,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840867098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:01,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:01,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:51:01,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945940439] [2021-06-05 16:51:01,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:01,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:01,257 INFO L87 Difference]: Start difference. First operand 148690 states and 434203 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:03,009 INFO L93 Difference]: Finished difference Result 170083 states and 494122 transitions. [2021-06-05 16:51:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:51:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:03,353 INFO L225 Difference]: With dead ends: 170083 [2021-06-05 16:51:03,353 INFO L226 Difference]: Without dead ends: 170083 [2021-06-05 16:51:03,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:51:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170083 states. [2021-06-05 16:51:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170083 to 155420. [2021-06-05 16:51:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155420 states, 155419 states have (on average 2.926553381504192) internal successors, (454842), 155419 states have internal predecessors, (454842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155420 states to 155420 states and 454842 transitions. [2021-06-05 16:51:07,195 INFO L78 Accepts]: Start accepts. Automaton has 155420 states and 454842 transitions. Word has length 43 [2021-06-05 16:51:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:07,195 INFO L482 AbstractCegarLoop]: Abstraction has 155420 states and 454842 transitions. [2021-06-05 16:51:07,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 155420 states and 454842 transitions. [2021-06-05 16:51:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:07,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:07,437 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:07,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 16:51:07,641 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash 351724844, now seen corresponding path program 174 times [2021-06-05 16:51:07,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:07,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882645324] [2021-06-05 16:51:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:07,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:07,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882645324] [2021-06-05 16:51:07,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882645324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:07,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179900263] [2021-06-05 16:51:07,686 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 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 [2021-06-05 16:51:07,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:51:07,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:07,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:07,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:07,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179900263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:07,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:07,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:51:07,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000501051] [2021-06-05 16:51:07,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:07,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:07,818 INFO L87 Difference]: Start difference. First operand 155420 states and 454842 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:09,511 INFO L93 Difference]: Finished difference Result 180254 states and 524821 transitions. [2021-06-05 16:51:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:51:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:09,887 INFO L225 Difference]: With dead ends: 180254 [2021-06-05 16:51:09,887 INFO L226 Difference]: Without dead ends: 180236 [2021-06-05 16:51:09,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:51:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180236 states. [2021-06-05 16:51:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180236 to 158892. [2021-06-05 16:51:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158892 states, 158891 states have (on average 2.927528934930235) internal successors, (465158), 158891 states have internal predecessors, (465158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158892 states to 158892 states and 465158 transitions. [2021-06-05 16:51:13,744 INFO L78 Accepts]: Start accepts. Automaton has 158892 states and 465158 transitions. Word has length 43 [2021-06-05 16:51:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:13,744 INFO L482 AbstractCegarLoop]: Abstraction has 158892 states and 465158 transitions. [2021-06-05 16:51:13,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:13,744 INFO L276 IsEmpty]: Start isEmpty. Operand 158892 states and 465158 transitions. [2021-06-05 16:51:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:13,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:13,955 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:14,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:14,157 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1080476662, now seen corresponding path program 175 times [2021-06-05 16:51:14,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:14,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103270600] [2021-06-05 16:51:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:14,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:14,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103270600] [2021-06-05 16:51:14,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103270600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:14,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990229725] [2021-06-05 16:51:14,197 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 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 [2021-06-05 16:51:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:14,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:14,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:14,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990229725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:14,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:14,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:51:14,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282345899] [2021-06-05 16:51:14,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:14,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:14,319 INFO L87 Difference]: Start difference. First operand 158892 states and 465158 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:16,271 INFO L93 Difference]: Finished difference Result 178308 states and 515729 transitions. [2021-06-05 16:51:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:51:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:16,614 INFO L225 Difference]: With dead ends: 178308 [2021-06-05 16:51:16,615 INFO L226 Difference]: Without dead ends: 178273 [2021-06-05 16:51:16,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:51:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178273 states. [2021-06-05 16:51:19,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178273 to 151546. [2021-06-05 16:51:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151546 states, 151545 states have (on average 2.9152726912798177) internal successors, (441795), 151545 states have internal predecessors, (441795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151546 states to 151546 states and 441795 transitions. [2021-06-05 16:51:20,428 INFO L78 Accepts]: Start accepts. Automaton has 151546 states and 441795 transitions. Word has length 43 [2021-06-05 16:51:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:20,428 INFO L482 AbstractCegarLoop]: Abstraction has 151546 states and 441795 transitions. [2021-06-05 16:51:20,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 151546 states and 441795 transitions. [2021-06-05 16:51:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:20,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:20,651 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:20,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:20,851 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:20,851 INFO L82 PathProgramCache]: Analyzing trace with hash 703505508, now seen corresponding path program 176 times [2021-06-05 16:51:20,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:20,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536522305] [2021-06-05 16:51:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:20,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:20,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536522305] [2021-06-05 16:51:20,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536522305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:20,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857745448] [2021-06-05 16:51:20,896 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 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 [2021-06-05 16:51:20,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:20,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:20,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:20,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:21,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857745448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:21,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:21,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:51:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855661924] [2021-06-05 16:51:21,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:21,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:21,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:21,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:21,024 INFO L87 Difference]: Start difference. First operand 151546 states and 441795 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:22,721 INFO L93 Difference]: Finished difference Result 159858 states and 464095 transitions. [2021-06-05 16:51:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:51:22,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:23,025 INFO L225 Difference]: With dead ends: 159858 [2021-06-05 16:51:23,025 INFO L226 Difference]: Without dead ends: 159844 [2021-06-05 16:51:23,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:51:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159844 states. [2021-06-05 16:51:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159844 to 130016. [2021-06-05 16:51:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130016 states, 130015 states have (on average 2.9079413913779177) internal successors, (378076), 130015 states have internal predecessors, (378076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130016 states to 130016 states and 378076 transitions. [2021-06-05 16:51:26,578 INFO L78 Accepts]: Start accepts. Automaton has 130016 states and 378076 transitions. Word has length 43 [2021-06-05 16:51:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:26,578 INFO L482 AbstractCegarLoop]: Abstraction has 130016 states and 378076 transitions. [2021-06-05 16:51:26,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 130016 states and 378076 transitions. [2021-06-05 16:51:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:26,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:26,749 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:26,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:26,950 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:26,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1361898402, now seen corresponding path program 177 times [2021-06-05 16:51:26,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:26,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596466100] [2021-06-05 16:51:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:26,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:26,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596466100] [2021-06-05 16:51:26,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596466100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:26,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655362027] [2021-06-05 16:51:26,993 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 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 [2021-06-05 16:51:27,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:51:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:27,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655362027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:27,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:27,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:51:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386279021] [2021-06-05 16:51:27,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:51:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:51:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:51:27,125 INFO L87 Difference]: Start difference. First operand 130016 states and 378076 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:28,612 INFO L93 Difference]: Finished difference Result 144036 states and 416535 transitions. [2021-06-05 16:51:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:51:28,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:28,912 INFO L225 Difference]: With dead ends: 144036 [2021-06-05 16:51:28,912 INFO L226 Difference]: Without dead ends: 143970 [2021-06-05 16:51:28,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=631, Invalid=1439, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:51:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143970 states. [2021-06-05 16:51:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143970 to 129574. [2021-06-05 16:51:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129574 states, 129573 states have (on average 2.908576632477445) internal successors, (376873), 129573 states have internal predecessors, (376873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129574 states to 129574 states and 376873 transitions. [2021-06-05 16:51:31,595 INFO L78 Accepts]: Start accepts. Automaton has 129574 states and 376873 transitions. Word has length 43 [2021-06-05 16:51:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:31,596 INFO L482 AbstractCegarLoop]: Abstraction has 129574 states and 376873 transitions. [2021-06-05 16:51:31,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 129574 states and 376873 transitions. [2021-06-05 16:51:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:31,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:31,756 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:31,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:31,957 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1179331944, now seen corresponding path program 178 times [2021-06-05 16:51:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:31,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067201696] [2021-06-05 16:51:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:31,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:31,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067201696] [2021-06-05 16:51:31,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067201696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:31,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10861580] [2021-06-05 16:51:31,993 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 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 [2021-06-05 16:51:32,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:32,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:32,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:32,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:32,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10861580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:32,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:32,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:51:32,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802348731] [2021-06-05 16:51:32,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:32,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:32,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:32,122 INFO L87 Difference]: Start difference. First operand 129574 states and 376873 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:33,884 INFO L93 Difference]: Finished difference Result 150350 states and 434516 transitions. [2021-06-05 16:51:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:51:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:33,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:34,370 INFO L225 Difference]: With dead ends: 150350 [2021-06-05 16:51:34,371 INFO L226 Difference]: Without dead ends: 150320 [2021-06-05 16:51:34,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:51:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150320 states. [2021-06-05 16:51:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150320 to 131074. [2021-06-05 16:51:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131074 states, 131073 states have (on average 2.9083564120757135) internal successors, (381207), 131073 states have internal predecessors, (381207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 381207 transitions. [2021-06-05 16:51:37,269 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 381207 transitions. Word has length 43 [2021-06-05 16:51:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:37,269 INFO L482 AbstractCegarLoop]: Abstraction has 131074 states and 381207 transitions. [2021-06-05 16:51:37,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 381207 transitions. [2021-06-05 16:51:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:37,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:37,453 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:37,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-05 16:51:37,653 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash 81707166, now seen corresponding path program 179 times [2021-06-05 16:51:37,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:37,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335300070] [2021-06-05 16:51:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:37,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:37,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335300070] [2021-06-05 16:51:37,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335300070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:37,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699652529] [2021-06-05 16:51:37,689 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 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 [2021-06-05 16:51:37,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:51:37,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:37,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:37,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699652529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:37,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:37,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:51:37,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642319263] [2021-06-05 16:51:37,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:37,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:37,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:37,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:37,817 INFO L87 Difference]: Start difference. First operand 131074 states and 381207 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:39,559 INFO L93 Difference]: Finished difference Result 165836 states and 478197 transitions. [2021-06-05 16:51:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:51:39,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:39,893 INFO L225 Difference]: With dead ends: 165836 [2021-06-05 16:51:39,893 INFO L226 Difference]: Without dead ends: 165824 [2021-06-05 16:51:39,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:51:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165824 states. [2021-06-05 16:51:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165824 to 132962. [2021-06-05 16:51:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132962 states, 132961 states have (on average 2.906709486240326) internal successors, (386479), 132961 states have internal predecessors, (386479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132962 states to 132962 states and 386479 transitions. [2021-06-05 16:51:43,506 INFO L78 Accepts]: Start accepts. Automaton has 132962 states and 386479 transitions. Word has length 43 [2021-06-05 16:51:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:43,506 INFO L482 AbstractCegarLoop]: Abstraction has 132962 states and 386479 transitions. [2021-06-05 16:51:43,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 132962 states and 386479 transitions. [2021-06-05 16:51:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:43,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:43,690 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:43,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 16:51:43,890 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash 981002536, now seen corresponding path program 180 times [2021-06-05 16:51:43,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:43,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441790112] [2021-06-05 16:51:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:43,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:43,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441790112] [2021-06-05 16:51:43,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441790112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:43,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278903749] [2021-06-05 16:51:43,926 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 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 [2021-06-05 16:51:43,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:51:43,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:43,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:44,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278903749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:44,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:44,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:51:44,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384141716] [2021-06-05 16:51:44,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:44,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:44,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:44,060 INFO L87 Difference]: Start difference. First operand 132962 states and 386479 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:45,830 INFO L93 Difference]: Finished difference Result 162439 states and 469100 transitions. [2021-06-05 16:51:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:51:45,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:46,154 INFO L225 Difference]: With dead ends: 162439 [2021-06-05 16:51:46,154 INFO L226 Difference]: Without dead ends: 162439 [2021-06-05 16:51:46,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:51:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162439 states. [2021-06-05 16:51:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162439 to 140434. [2021-06-05 16:51:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140434 states, 140433 states have (on average 2.9111462405559947) internal successors, (408821), 140433 states have internal predecessors, (408821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140434 states to 140434 states and 408821 transitions. [2021-06-05 16:51:49,226 INFO L78 Accepts]: Start accepts. Automaton has 140434 states and 408821 transitions. Word has length 43 [2021-06-05 16:51:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:49,226 INFO L482 AbstractCegarLoop]: Abstraction has 140434 states and 408821 transitions. [2021-06-05 16:51:49,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 140434 states and 408821 transitions. [2021-06-05 16:51:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:50,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:50,035 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:50,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 16:51:50,236 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1122086154, now seen corresponding path program 181 times [2021-06-05 16:51:50,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:50,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645606336] [2021-06-05 16:51:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:50,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:50,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645606336] [2021-06-05 16:51:50,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645606336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:50,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105336521] [2021-06-05 16:51:50,273 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 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 [2021-06-05 16:51:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:50,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:50,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:50,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105336521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:50,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:50,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 16:51:50,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816717805] [2021-06-05 16:51:50,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:50,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:50,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:50,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:50,405 INFO L87 Difference]: Start difference. First operand 140434 states and 408821 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:51,469 INFO L93 Difference]: Finished difference Result 157083 states and 454504 transitions. [2021-06-05 16:51:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:51:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:51,767 INFO L225 Difference]: With dead ends: 157083 [2021-06-05 16:51:51,767 INFO L226 Difference]: Without dead ends: 157062 [2021-06-05 16:51:51,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=847, Invalid=1703, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:51:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157062 states. [2021-06-05 16:51:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157062 to 122230. [2021-06-05 16:51:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122230 states, 122229 states have (on average 2.90133274427509) internal successors, (354627), 122229 states have internal predecessors, (354627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122230 states to 122230 states and 354627 transitions. [2021-06-05 16:51:55,257 INFO L78 Accepts]: Start accepts. Automaton has 122230 states and 354627 transitions. Word has length 43 [2021-06-05 16:51:55,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:55,258 INFO L482 AbstractCegarLoop]: Abstraction has 122230 states and 354627 transitions. [2021-06-05 16:51:55,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 122230 states and 354627 transitions. [2021-06-05 16:51:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:51:55,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:55,427 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:55,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 16:51:55,627 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:55,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1206484928, now seen corresponding path program 182 times [2021-06-05 16:51:55,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:55,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165246687] [2021-06-05 16:51:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:55,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165246687] [2021-06-05 16:51:55,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165246687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912533781] [2021-06-05 16:51:55,669 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 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 [2021-06-05 16:51:55,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:55,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:51:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:55,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912533781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:55,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:55,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:51:55,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391535895] [2021-06-05 16:51:55,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:51:55,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:51:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:51:55,799 INFO L87 Difference]: Start difference. First operand 122230 states and 354627 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:57,261 INFO L93 Difference]: Finished difference Result 142842 states and 411920 transitions. [2021-06-05 16:51:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:51:57,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:51:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:57,538 INFO L225 Difference]: With dead ends: 142842 [2021-06-05 16:51:57,538 INFO L226 Difference]: Without dead ends: 142786 [2021-06-05 16:51:57,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:51:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142786 states. [2021-06-05 16:51:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142786 to 120606. [2021-06-05 16:52:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120606 states, 120605 states have (on average 2.9076489366112517) internal successors, (350677), 120605 states have internal predecessors, (350677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120606 states to 120606 states and 350677 transitions. [2021-06-05 16:52:00,273 INFO L78 Accepts]: Start accepts. Automaton has 120606 states and 350677 transitions. Word has length 43 [2021-06-05 16:52:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:00,273 INFO L482 AbstractCegarLoop]: Abstraction has 120606 states and 350677 transitions. [2021-06-05 16:52:00,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 120606 states and 350677 transitions. [2021-06-05 16:52:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:00,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:00,439 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:00,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 16:52:00,648 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:00,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1475403872, now seen corresponding path program 183 times [2021-06-05 16:52:00,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:00,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026093737] [2021-06-05 16:52:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:00,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:00,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026093737] [2021-06-05 16:52:00,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026093737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:00,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791029011] [2021-06-05 16:52:00,694 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 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 [2021-06-05 16:52:00,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:52:00,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:00,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:00,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:00,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791029011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:00,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:00,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:52:00,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497108700] [2021-06-05 16:52:00,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:00,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:00,838 INFO L87 Difference]: Start difference. First operand 120606 states and 350677 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:02,351 INFO L93 Difference]: Finished difference Result 132227 states and 382026 transitions. [2021-06-05 16:52:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:52:02,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:52:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:02,599 INFO L225 Difference]: With dead ends: 132227 [2021-06-05 16:52:02,599 INFO L226 Difference]: Without dead ends: 132161 [2021-06-05 16:52:02,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=676, Invalid=1676, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:52:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132161 states. [2021-06-05 16:52:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132161 to 119216. [2021-06-05 16:52:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119216 states, 119215 states have (on average 2.907016734471333) internal successors, (346560), 119215 states have internal predecessors, (346560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119216 states to 119216 states and 346560 transitions. [2021-06-05 16:52:05,350 INFO L78 Accepts]: Start accepts. Automaton has 119216 states and 346560 transitions. Word has length 43 [2021-06-05 16:52:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:05,350 INFO L482 AbstractCegarLoop]: Abstraction has 119216 states and 346560 transitions. [2021-06-05 16:52:05,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 119216 states and 346560 transitions. [2021-06-05 16:52:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:05,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:05,521 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:05,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:05,721 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1857040322, now seen corresponding path program 184 times [2021-06-05 16:52:05,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:05,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964848570] [2021-06-05 16:52:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:05,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:05,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964848570] [2021-06-05 16:52:05,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964848570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:05,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170000088] [2021-06-05 16:52:05,757 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 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 [2021-06-05 16:52:05,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:05,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:05,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:05,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170000088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:05,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:05,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:52:05,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429637624] [2021-06-05 16:52:05,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:52:05,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:05,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:52:05,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:52:05,896 INFO L87 Difference]: Start difference. First operand 119216 states and 346560 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:07,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:07,517 INFO L93 Difference]: Finished difference Result 148054 states and 426823 transitions. [2021-06-05 16:52:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:52:07,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:52:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:07,799 INFO L225 Difference]: With dead ends: 148054 [2021-06-05 16:52:07,799 INFO L226 Difference]: Without dead ends: 148024 [2021-06-05 16:52:07,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 931.9ms TimeCoverageRelationStatistics Valid=732, Invalid=1718, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:52:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148024 states. [2021-06-05 16:52:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148024 to 120930. [2021-06-05 16:52:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120930 states, 120929 states have (on average 2.9046713360732332) internal successors, (351259), 120929 states have internal predecessors, (351259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120930 states to 120930 states and 351259 transitions. [2021-06-05 16:52:10,689 INFO L78 Accepts]: Start accepts. Automaton has 120930 states and 351259 transitions. Word has length 43 [2021-06-05 16:52:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:10,689 INFO L482 AbstractCegarLoop]: Abstraction has 120930 states and 351259 transitions. [2021-06-05 16:52:10,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 120930 states and 351259 transitions. [2021-06-05 16:52:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:10,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:10,859 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:11,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:11,060 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash 228319968, now seen corresponding path program 185 times [2021-06-05 16:52:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:11,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104586422] [2021-06-05 16:52:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:11,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:11,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104586422] [2021-06-05 16:52:11,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104586422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:11,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064067724] [2021-06-05 16:52:11,097 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 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 [2021-06-05 16:52:11,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:52:11,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:11,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:11,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064067724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:11,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:11,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 16:52:11,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016849225] [2021-06-05 16:52:11,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:11,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:11,257 INFO L87 Difference]: Start difference. First operand 120930 states and 351259 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:13,043 INFO L93 Difference]: Finished difference Result 167645 states and 483468 transitions. [2021-06-05 16:52:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:52:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:52:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:13,361 INFO L225 Difference]: With dead ends: 167645 [2021-06-05 16:52:13,362 INFO L226 Difference]: Without dead ends: 167639 [2021-06-05 16:52:13,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1113.7ms TimeCoverageRelationStatistics Valid=975, Invalid=1995, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:52:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167639 states. [2021-06-05 16:52:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167639 to 127822. [2021-06-05 16:52:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127822 states, 127821 states have (on average 2.902879808482174) internal successors, (371049), 127821 states have internal predecessors, (371049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127822 states to 127822 states and 371049 transitions. [2021-06-05 16:52:17,047 INFO L78 Accepts]: Start accepts. Automaton has 127822 states and 371049 transitions. Word has length 43 [2021-06-05 16:52:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:17,047 INFO L482 AbstractCegarLoop]: Abstraction has 127822 states and 371049 transitions. [2021-06-05 16:52:17,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 127822 states and 371049 transitions. [2021-06-05 16:52:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:17,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:17,216 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:17,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 16:52:17,417 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1707881602, now seen corresponding path program 186 times [2021-06-05 16:52:17,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:17,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248661309] [2021-06-05 16:52:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:17,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:17,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248661309] [2021-06-05 16:52:17,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248661309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:17,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452325697] [2021-06-05 16:52:17,458 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 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 [2021-06-05 16:52:17,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 16:52:17,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:17,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:17,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:17,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452325697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:17,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:17,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 16:52:17,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881612565] [2021-06-05 16:52:17,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:17,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:17,617 INFO L87 Difference]: Start difference. First operand 127822 states and 371049 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:19,788 INFO L93 Difference]: Finished difference Result 170745 states and 491050 transitions. [2021-06-05 16:52:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:52:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:52:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:20,121 INFO L225 Difference]: With dead ends: 170745 [2021-06-05 16:52:20,122 INFO L226 Difference]: Without dead ends: 170745 [2021-06-05 16:52:20,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 732.9ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:52:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170745 states. [2021-06-05 16:52:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170745 to 138414. [2021-06-05 16:52:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138414 states, 138413 states have (on average 2.904980023552701) internal successors, (402087), 138413 states have internal predecessors, (402087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138414 states to 138414 states and 402087 transitions. [2021-06-05 16:52:23,855 INFO L78 Accepts]: Start accepts. Automaton has 138414 states and 402087 transitions. Word has length 43 [2021-06-05 16:52:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:23,855 INFO L482 AbstractCegarLoop]: Abstraction has 138414 states and 402087 transitions. [2021-06-05 16:52:23,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 138414 states and 402087 transitions. [2021-06-05 16:52:24,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:24,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:24,065 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:24,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:24,265 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1848965220, now seen corresponding path program 187 times [2021-06-05 16:52:24,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:24,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284995774] [2021-06-05 16:52:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:24,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:24,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284995774] [2021-06-05 16:52:24,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284995774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:24,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673555011] [2021-06-05 16:52:24,307 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 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 [2021-06-05 16:52:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:24,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:24,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673555011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:24,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:24,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 16:52:24,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860729170] [2021-06-05 16:52:24,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:24,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:24,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:24,457 INFO L87 Difference]: Start difference. First operand 138414 states and 402087 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 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) [2021-06-05 16:52:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:26,189 INFO L93 Difference]: Finished difference Result 166155 states and 478574 transitions. [2021-06-05 16:52:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:52:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 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) Word has length 43 [2021-06-05 16:52:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:26,535 INFO L225 Difference]: With dead ends: 166155 [2021-06-05 16:52:26,535 INFO L226 Difference]: Without dead ends: 166134 [2021-06-05 16:52:26,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=1030, Invalid=2162, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:52:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166134 states. [2021-06-05 16:52:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166134 to 132754. [2021-06-05 16:52:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132754 states, 132753 states have (on average 2.90065761225735) internal successors, (385071), 132753 states have internal predecessors, (385071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132754 states to 132754 states and 385071 transitions. [2021-06-05 16:52:29,518 INFO L78 Accepts]: Start accepts. Automaton has 132754 states and 385071 transitions. Word has length 43 [2021-06-05 16:52:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:29,518 INFO L482 AbstractCegarLoop]: Abstraction has 132754 states and 385071 transitions. [2021-06-05 16:52:29,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 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) [2021-06-05 16:52:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 132754 states and 385071 transitions. [2021-06-05 16:52:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:29,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:29,715 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:30,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:30,233 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1933363994, now seen corresponding path program 188 times [2021-06-05 16:52:30,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:30,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520790938] [2021-06-05 16:52:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:30,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:30,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520790938] [2021-06-05 16:52:30,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520790938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:30,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628264002] [2021-06-05 16:52:30,279 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 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 [2021-06-05 16:52:30,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:30,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:30,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:30,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628264002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:30,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:30,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 16:52:30,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779035517] [2021-06-05 16:52:30,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:52:30,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:30,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:52:30,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:52:30,460 INFO L87 Difference]: Start difference. First operand 132754 states and 385071 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 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) [2021-06-05 16:52:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:31,527 INFO L93 Difference]: Finished difference Result 165237 states and 475345 transitions. [2021-06-05 16:52:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:52:31,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 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) Word has length 43 [2021-06-05 16:52:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:31,830 INFO L225 Difference]: With dead ends: 165237 [2021-06-05 16:52:31,830 INFO L226 Difference]: Without dead ends: 165153 [2021-06-05 16:52:31,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 473.5ms TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:52:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165153 states. [2021-06-05 16:52:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165153 to 132063. [2021-06-05 16:52:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132063 states, 132062 states have (on average 2.9023564689312598) internal successors, (383291), 132062 states have internal predecessors, (383291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132063 states to 132063 states and 383291 transitions. [2021-06-05 16:52:35,980 INFO L78 Accepts]: Start accepts. Automaton has 132063 states and 383291 transitions. Word has length 43 [2021-06-05 16:52:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:35,980 INFO L482 AbstractCegarLoop]: Abstraction has 132063 states and 383291 transitions. [2021-06-05 16:52:35,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 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) [2021-06-05 16:52:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 132063 states and 383291 transitions. [2021-06-05 16:52:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:36,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:36,238 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:36,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:36,462 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash -721565792, now seen corresponding path program 189 times [2021-06-05 16:52:36,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:36,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463105846] [2021-06-05 16:52:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:36,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:36,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463105846] [2021-06-05 16:52:36,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463105846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:36,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745260819] [2021-06-05 16:52:36,512 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 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 [2021-06-05 16:52:36,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 16:52:36,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:36,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745260819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:36,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:36,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:52:36,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450034270] [2021-06-05 16:52:36,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:36,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:36,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:36,691 INFO L87 Difference]: Start difference. First operand 132063 states and 383291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-06-05 16:52:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:38,272 INFO L93 Difference]: Finished difference Result 165113 states and 474768 transitions. [2021-06-05 16:52:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:52:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) Word has length 43 [2021-06-05 16:52:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:38,598 INFO L225 Difference]: With dead ends: 165113 [2021-06-05 16:52:38,598 INFO L226 Difference]: Without dead ends: 165015 [2021-06-05 16:52:38,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:52:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165015 states. [2021-06-05 16:52:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165015 to 133988. [2021-06-05 16:52:41,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133988 states, 133987 states have (on average 2.903714539470247) internal successors, (389060), 133987 states have internal predecessors, (389060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133988 states to 133988 states and 389060 transitions. [2021-06-05 16:52:42,187 INFO L78 Accepts]: Start accepts. Automaton has 133988 states and 389060 transitions. Word has length 43 [2021-06-05 16:52:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:42,187 INFO L482 AbstractCegarLoop]: Abstraction has 133988 states and 389060 transitions. [2021-06-05 16:52:42,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2021-06-05 16:52:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 133988 states and 389060 transitions. [2021-06-05 16:52:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:42,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:42,510 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:42,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:42,710 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:42,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:42,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1517368606, now seen corresponding path program 190 times [2021-06-05 16:52:42,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:42,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692773747] [2021-06-05 16:52:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:42,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692773747] [2021-06-05 16:52:42,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692773747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363956174] [2021-06-05 16:52:42,780 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 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 [2021-06-05 16:52:42,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:42,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:42,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:42,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363956174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:42,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:42,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:52:42,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985727966] [2021-06-05 16:52:42,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:52:42,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:52:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:52:42,938 INFO L87 Difference]: Start difference. First operand 133988 states and 389060 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 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) [2021-06-05 16:52:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:43,980 INFO L93 Difference]: Finished difference Result 149805 states and 432340 transitions. [2021-06-05 16:52:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:52:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 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) Word has length 43 [2021-06-05 16:52:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:44,270 INFO L225 Difference]: With dead ends: 149805 [2021-06-05 16:52:44,270 INFO L226 Difference]: Without dead ends: 149739 [2021-06-05 16:52:44,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:52:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149739 states. [2021-06-05 16:52:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149739 to 136196. [2021-06-05 16:52:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136196 states, 136195 states have (on average 2.900356107052388) internal successors, (395014), 136195 states have internal predecessors, (395014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 395014 transitions. [2021-06-05 16:52:47,731 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 395014 transitions. Word has length 43 [2021-06-05 16:52:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:47,731 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 395014 transitions. [2021-06-05 16:52:47,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 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) [2021-06-05 16:52:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 395014 transitions. [2021-06-05 16:52:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:47,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:47,919 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:48,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 16:52:48,120 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash 826070824, now seen corresponding path program 191 times [2021-06-05 16:52:48,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:48,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433870526] [2021-06-05 16:52:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:48,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:48,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433870526] [2021-06-05 16:52:48,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433870526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:48,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374750214] [2021-06-05 16:52:48,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 16:52:48,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:52:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:48,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374750214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:48,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:48,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:52:48,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184698791] [2021-06-05 16:52:48,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:52:48,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:48,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:52:48,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:52:48,309 INFO L87 Difference]: Start difference. First operand 136196 states and 395014 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 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) [2021-06-05 16:52:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:49,975 INFO L93 Difference]: Finished difference Result 170919 states and 492163 transitions. [2021-06-05 16:52:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:52:49,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 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) Word has length 43 [2021-06-05 16:52:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:50,296 INFO L225 Difference]: With dead ends: 170919 [2021-06-05 16:52:50,296 INFO L226 Difference]: Without dead ends: 170889 [2021-06-05 16:52:50,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=809, Invalid=2053, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:52:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170889 states. [2021-06-05 16:52:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170889 to 142906. [2021-06-05 16:52:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142906 states, 142905 states have (on average 2.900143451943599) internal successors, (414445), 142905 states have internal predecessors, (414445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142906 states to 142906 states and 414445 transitions. [2021-06-05 16:52:53,967 INFO L78 Accepts]: Start accepts. Automaton has 142906 states and 414445 transitions. Word has length 43 [2021-06-05 16:52:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:53,967 INFO L482 AbstractCegarLoop]: Abstraction has 142906 states and 414445 transitions. [2021-06-05 16:52:53,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 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) [2021-06-05 16:52:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 142906 states and 414445 transitions. [2021-06-05 16:52:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:52:54,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:54,171 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:54,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 16:52:54,372 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:54,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash -11435682, now seen corresponding path program 192 times [2021-06-05 16:52:54,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:54,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785165479] [2021-06-05 16:52:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:54,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:54,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785165479] [2021-06-05 16:52:54,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785165479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:54,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897402779] [2021-06-05 16:52:54,402 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 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 [2021-06-05 16:52:54,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:52:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:54,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:52:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:54,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897402779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:54,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:54,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 16:52:54,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783543518] [2021-06-05 16:52:54,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:52:54,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:52:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:52:54,546 INFO L87 Difference]: Start difference. First operand 142906 states and 414445 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) [2021-06-05 16:52:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:56,432 INFO L93 Difference]: Finished difference Result 189714 states and 547144 transitions. [2021-06-05 16:52:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:52:56,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) Word has length 43 [2021-06-05 16:52:56,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:56,812 INFO L225 Difference]: With dead ends: 189714 [2021-06-05 16:52:56,812 INFO L226 Difference]: Without dead ends: 189708 [2021-06-05 16:52:56,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 569.2ms TimeCoverageRelationStatistics Valid=1227, Invalid=2679, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:52:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189708 states. [2021-06-05 16:53:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189708 to 154668. [2021-06-05 16:53:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154668 states, 154667 states have (on average 2.8988601317669573) internal successors, (448358), 154667 states have internal predecessors, (448358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154668 states to 154668 states and 448358 transitions. [2021-06-05 16:53:00,750 INFO L78 Accepts]: Start accepts. Automaton has 154668 states and 448358 transitions. Word has length 43 [2021-06-05 16:53:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:00,750 INFO L482 AbstractCegarLoop]: Abstraction has 154668 states and 448358 transitions. [2021-06-05 16:53:00,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) [2021-06-05 16:53:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 154668 states and 448358 transitions. [2021-06-05 16:53:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:53:00,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:00,987 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:01,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 16:53:01,187 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:01,188 INFO L82 PathProgramCache]: Analyzing trace with hash 937030376, now seen corresponding path program 193 times [2021-06-05 16:53:01,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:01,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437940945] [2021-06-05 16:53:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:01,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:01,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437940945] [2021-06-05 16:53:01,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437940945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:01,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757814335] [2021-06-05 16:53:01,220 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 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 [2021-06-05 16:53:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:01,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:53:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:01,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757814335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:01,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:01,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 16:53:01,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176667311] [2021-06-05 16:53:01,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:01,361 INFO L87 Difference]: Start difference. First operand 154668 states and 448358 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) [2021-06-05 16:53:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:03,436 INFO L93 Difference]: Finished difference Result 222961 states and 642150 transitions. [2021-06-05 16:53:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:53:03,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) Word has length 43 [2021-06-05 16:53:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:03,952 INFO L225 Difference]: With dead ends: 222961 [2021-06-05 16:53:03,952 INFO L226 Difference]: Without dead ends: 222961 [2021-06-05 16:53:03,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:53:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222961 states. [2021-06-05 16:53:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222961 to 194204. [2021-06-05 16:53:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194204 states, 194203 states have (on average 2.8963198302806856) internal successors, (562474), 194203 states have internal predecessors, (562474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194204 states to 194204 states and 562474 transitions. [2021-06-05 16:53:09,185 INFO L78 Accepts]: Start accepts. Automaton has 194204 states and 562474 transitions. Word has length 43 [2021-06-05 16:53:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:09,185 INFO L482 AbstractCegarLoop]: Abstraction has 194204 states and 562474 transitions. [2021-06-05 16:53:09,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) [2021-06-05 16:53:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 194204 states and 562474 transitions. [2021-06-05 16:53:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:53:09,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:09,444 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:09,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:09,645 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:09,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:09,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1078113994, now seen corresponding path program 194 times [2021-06-05 16:53:09,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:09,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440818274] [2021-06-05 16:53:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:09,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:09,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440818274] [2021-06-05 16:53:09,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440818274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:09,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338699033] [2021-06-05 16:53:09,672 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 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 [2021-06-05 16:53:09,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:53:09,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:09,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338699033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:09,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:09,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-05 16:53:09,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545576916] [2021-06-05 16:53:09,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:09,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:09,824 INFO L87 Difference]: Start difference. First operand 194204 states and 562474 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:11,159 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 16:53:11,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:11,857 INFO L93 Difference]: Finished difference Result 220222 states and 634358 transitions. [2021-06-05 16:53:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:53:11,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:53:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:12,320 INFO L225 Difference]: With dead ends: 220222 [2021-06-05 16:53:12,320 INFO L226 Difference]: Without dead ends: 220208 [2021-06-05 16:53:12,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1174.7ms TimeCoverageRelationStatistics Valid=1091, Invalid=2449, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:53:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220208 states. [2021-06-05 16:53:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220208 to 192400. [2021-06-05 16:53:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192400 states, 192399 states have (on average 2.8951605777576805) internal successors, (557026), 192399 states have internal predecessors, (557026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192400 states to 192400 states and 557026 transitions. [2021-06-05 16:53:17,378 INFO L78 Accepts]: Start accepts. Automaton has 192400 states and 557026 transitions. Word has length 43 [2021-06-05 16:53:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:17,378 INFO L482 AbstractCegarLoop]: Abstraction has 192400 states and 557026 transitions. [2021-06-05 16:53:17,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 192400 states and 557026 transitions. [2021-06-05 16:53:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:53:17,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:17,641 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:17,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:17,841 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:17,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1162512768, now seen corresponding path program 195 times [2021-06-05 16:53:17,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:17,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173506898] [2021-06-05 16:53:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:17,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:17,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173506898] [2021-06-05 16:53:17,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173506898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:17,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58056124] [2021-06-05 16:53:17,875 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 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 [2021-06-05 16:53:17,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:53:17,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:17,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:53:17,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:18,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58056124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:18,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:18,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 16:53:18,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497452563] [2021-06-05 16:53:18,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:53:18,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:18,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:53:18,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:53:18,015 INFO L87 Difference]: Start difference. First operand 192400 states and 557026 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:19,247 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 16:53:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:19,966 INFO L93 Difference]: Finished difference Result 221539 states and 638003 transitions. [2021-06-05 16:53:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:53:19,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:53:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:20,428 INFO L225 Difference]: With dead ends: 221539 [2021-06-05 16:53:20,428 INFO L226 Difference]: Without dead ends: 221483 [2021-06-05 16:53:20,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1124.9ms TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:53:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221483 states. [2021-06-05 16:53:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221483 to 195688. [2021-06-05 16:53:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195688 states, 195687 states have (on average 2.894111514817029) internal successors, (566340), 195687 states have internal predecessors, (566340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195688 states to 195688 states and 566340 transitions. [2021-06-05 16:53:25,585 INFO L78 Accepts]: Start accepts. Automaton has 195688 states and 566340 transitions. Word has length 43 [2021-06-05 16:53:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:25,585 INFO L482 AbstractCegarLoop]: Abstraction has 195688 states and 566340 transitions. [2021-06-05 16:53:25,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 195688 states and 566340 transitions. [2021-06-05 16:53:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:53:25,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:25,858 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:26,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 16:53:26,059 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1492417018, now seen corresponding path program 196 times [2021-06-05 16:53:26,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:26,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750228558] [2021-06-05 16:53:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:26,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:26,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750228558] [2021-06-05 16:53:26,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750228558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:26,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049507923] [2021-06-05 16:53:26,098 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 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 [2021-06-05 16:53:26,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:26,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:53:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049507923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:26,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:26,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:53:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596891765] [2021-06-05 16:53:26,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:53:26,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:53:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:53:26,243 INFO L87 Difference]: Start difference. First operand 195688 states and 566340 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:28,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:28,253 INFO L93 Difference]: Finished difference Result 229009 states and 659218 transitions. [2021-06-05 16:53:28,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:53:28,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:53:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:28,734 INFO L225 Difference]: With dead ends: 229009 [2021-06-05 16:53:28,734 INFO L226 Difference]: Without dead ends: 228911 [2021-06-05 16:53:28,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 480.5ms TimeCoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:53:28,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228911 states. [2021-06-05 16:53:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228911 to 202580. [2021-06-05 16:53:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202580 states, 202579 states have (on average 2.892817123196383) internal successors, (586024), 202579 states have internal predecessors, (586024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202580 states to 202580 states and 586024 transitions. [2021-06-05 16:53:34,830 INFO L78 Accepts]: Start accepts. Automaton has 202580 states and 586024 transitions. Word has length 43 [2021-06-05 16:53:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:34,830 INFO L482 AbstractCegarLoop]: Abstraction has 202580 states and 586024 transitions. [2021-06-05 16:53:34,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 202580 states and 586024 transitions. [2021-06-05 16:53:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 16:53:35,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:35,187 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:35,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:35,432 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1612051392, now seen corresponding path program 197 times [2021-06-05 16:53:35,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:35,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138629810] [2021-06-05 16:53:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:35,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:35,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138629810] [2021-06-05 16:53:35,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138629810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:35,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588193654] [2021-06-05 16:53:35,508 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 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 [2021-06-05 16:53:35,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:53:35,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:35,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:53:35,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:35,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588193654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:35,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:35,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:53:35,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135819022] [2021-06-05 16:53:35,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:53:35,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:35,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:53:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:53:35,717 INFO L87 Difference]: Start difference. First operand 202580 states and 586024 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:37,965 INFO L93 Difference]: Finished difference Result 232294 states and 668787 transitions. [2021-06-05 16:53:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:53:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 16:53:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:38,450 INFO L225 Difference]: With dead ends: 232294 [2021-06-05 16:53:38,450 INFO L226 Difference]: Without dead ends: 232154 [2021-06-05 16:53:38,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:53:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232154 states. [2021-06-05 16:53:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232154 to 206255. [2021-06-05 16:53:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206255 states, 206254 states have (on average 2.892002094504834) internal successors, (596487), 206254 states have internal predecessors, (596487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206255 states to 206255 states and 596487 transitions. [2021-06-05 16:53:43,939 INFO L78 Accepts]: Start accepts. Automaton has 206255 states and 596487 transitions. Word has length 43 [2021-06-05 16:53:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:43,939 INFO L482 AbstractCegarLoop]: Abstraction has 206255 states and 596487 transitions. [2021-06-05 16:53:43,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 206255 states and 596487 transitions. [2021-06-05 16:53:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:53:44,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:44,303 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:44,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:44,525 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:44,525 INFO L82 PathProgramCache]: Analyzing trace with hash 993831136, now seen corresponding path program 198 times [2021-06-05 16:53:44,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:44,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562351561] [2021-06-05 16:53:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:44,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562351561] [2021-06-05 16:53:44,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562351561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:44,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524553023] [2021-06-05 16:53:44,779 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 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 [2021-06-05 16:53:44,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:53:44,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:44,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:53:44,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:46,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524553023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:46,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:46,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-05 16:53:46,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342788088] [2021-06-05 16:53:46,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:53:46,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:46,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:53:46,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:53:46,580 INFO L87 Difference]: Start difference. First operand 206255 states and 596487 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:48,012 INFO L93 Difference]: Finished difference Result 283800 states and 818276 transitions. [2021-06-05 16:53:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:53:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:53:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:49,198 INFO L225 Difference]: With dead ends: 283800 [2021-06-05 16:53:49,198 INFO L226 Difference]: Without dead ends: 283762 [2021-06-05 16:53:49,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2005.3ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:53:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283762 states. [2021-06-05 16:53:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283762 to 206283. [2021-06-05 16:53:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206283 states, 206282 states have (on average 2.8919004081790947) internal successors, (596547), 206282 states have internal predecessors, (596547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206283 states to 206283 states and 596547 transitions. [2021-06-05 16:53:53,710 INFO L78 Accepts]: Start accepts. Automaton has 206283 states and 596547 transitions. Word has length 46 [2021-06-05 16:53:53,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:53,710 INFO L482 AbstractCegarLoop]: Abstraction has 206283 states and 596547 transitions. [2021-06-05 16:53:53,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 206283 states and 596547 transitions. [2021-06-05 16:53:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:53:54,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:54,791 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:55,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:55,015 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash -290942774, now seen corresponding path program 199 times [2021-06-05 16:53:55,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:55,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383427121] [2021-06-05 16:53:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:55,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383427121] [2021-06-05 16:53:55,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383427121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121231593] [2021-06-05 16:53:55,160 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 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 [2021-06-05 16:53:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:53:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:55,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121231593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:55,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:55,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 16:53:55,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71399286] [2021-06-05 16:53:55,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:53:55,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:53:55,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:53:55,400 INFO L87 Difference]: Start difference. First operand 206283 states and 596547 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:57,598 INFO L93 Difference]: Finished difference Result 306545 states and 884487 transitions. [2021-06-05 16:53:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:53:57,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:53:57,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:58,358 INFO L225 Difference]: With dead ends: 306545 [2021-06-05 16:53:58,358 INFO L226 Difference]: Without dead ends: 306463 [2021-06-05 16:53:58,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:53:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306463 states. [2021-06-05 16:54:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306463 to 226606. [2021-06-05 16:54:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226606 states, 226605 states have (on average 2.8947110610975044) internal successors, (655956), 226605 states have internal predecessors, (655956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226606 states to 226606 states and 655956 transitions. [2021-06-05 16:54:04,042 INFO L78 Accepts]: Start accepts. Automaton has 226606 states and 655956 transitions. Word has length 46 [2021-06-05 16:54:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:04,043 INFO L482 AbstractCegarLoop]: Abstraction has 226606 states and 655956 transitions. [2021-06-05 16:54:04,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 226606 states and 655956 transitions. [2021-06-05 16:54:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:54:04,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:04,400 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:04,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:04,600 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash 305163142, now seen corresponding path program 200 times [2021-06-05 16:54:04,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:04,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778299826] [2021-06-05 16:54:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:04,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:04,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778299826] [2021-06-05 16:54:04,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778299826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:04,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73847939] [2021-06-05 16:54:04,764 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 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 [2021-06-05 16:54:04,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:04,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:04,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:04,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73847939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:04,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:04,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 16:54:04,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573754003] [2021-06-05 16:54:04,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:54:04,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:54:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:54:04,995 INFO L87 Difference]: Start difference. First operand 226606 states and 655956 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:07,209 INFO L93 Difference]: Finished difference Result 306514 states and 884419 transitions. [2021-06-05 16:54:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:54:07,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:54:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:08,451 INFO L225 Difference]: With dead ends: 306514 [2021-06-05 16:54:08,451 INFO L226 Difference]: Without dead ends: 306402 [2021-06-05 16:54:08,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:54:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306402 states. [2021-06-05 16:54:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306402 to 223282. [2021-06-05 16:54:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223282 states, 223281 states have (on average 2.892543476605712) internal successors, (645850), 223281 states have internal predecessors, (645850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223282 states to 223282 states and 645850 transitions. [2021-06-05 16:54:13,908 INFO L78 Accepts]: Start accepts. Automaton has 223282 states and 645850 transitions. Word has length 46 [2021-06-05 16:54:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:13,908 INFO L482 AbstractCegarLoop]: Abstraction has 223282 states and 645850 transitions. [2021-06-05 16:54:13,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 223282 states and 645850 transitions. [2021-06-05 16:54:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:54:14,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:14,261 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:14,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:14,462 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash -752360386, now seen corresponding path program 201 times [2021-06-05 16:54:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:14,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761677474] [2021-06-05 16:54:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:14,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:14,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761677474] [2021-06-05 16:54:14,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761677474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:14,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818669592] [2021-06-05 16:54:14,607 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 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 [2021-06-05 16:54:14,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:54:14,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:14,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:14,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818669592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:14,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:14,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-05 16:54:14,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269141755] [2021-06-05 16:54:14,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:54:14,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:54:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:54:14,858 INFO L87 Difference]: Start difference. First operand 223282 states and 645850 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:16,965 INFO L93 Difference]: Finished difference Result 306804 states and 884969 transitions. [2021-06-05 16:54:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:54:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:54:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:17,615 INFO L225 Difference]: With dead ends: 306804 [2021-06-05 16:54:17,616 INFO L226 Difference]: Without dead ends: 306680 [2021-06-05 16:54:17,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:54:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306680 states. [2021-06-05 16:54:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306680 to 225174. [2021-06-05 16:54:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225174 states, 225173 states have (on average 2.8930644437832242) internal successors, (651440), 225173 states have internal predecessors, (651440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225174 states to 225174 states and 651440 transitions. [2021-06-05 16:54:23,157 INFO L78 Accepts]: Start accepts. Automaton has 225174 states and 651440 transitions. Word has length 46 [2021-06-05 16:54:23,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:23,157 INFO L482 AbstractCegarLoop]: Abstraction has 225174 states and 651440 transitions. [2021-06-05 16:54:23,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 225174 states and 651440 transitions. [2021-06-05 16:54:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:54:24,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:24,583 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:24,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 16:54:24,798 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:24,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:24,798 INFO L82 PathProgramCache]: Analyzing trace with hash 426214436, now seen corresponding path program 202 times [2021-06-05 16:54:24,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:24,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543791230] [2021-06-05 16:54:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:24,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:24,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543791230] [2021-06-05 16:54:24,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543791230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:24,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029665906] [2021-06-05 16:54:24,985 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 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 [2021-06-05 16:54:25,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:25,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:25,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:25,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029665906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:25,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:25,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 16:54:25,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104167228] [2021-06-05 16:54:25,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:54:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:54:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:54:25,343 INFO L87 Difference]: Start difference. First operand 225174 states and 651440 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:27,257 INFO L93 Difference]: Finished difference Result 307154 states and 885951 transitions. [2021-06-05 16:54:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:54:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:54:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:28,503 INFO L225 Difference]: With dead ends: 307154 [2021-06-05 16:54:28,504 INFO L226 Difference]: Without dead ends: 307024 [2021-06-05 16:54:28,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:54:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307024 states. [2021-06-05 16:54:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307024 to 226798. [2021-06-05 16:54:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226798 states, 226797 states have (on average 2.893636159208455) internal successors, (656268), 226797 states have internal predecessors, (656268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226798 states to 226798 states and 656268 transitions. [2021-06-05 16:54:33,978 INFO L78 Accepts]: Start accepts. Automaton has 226798 states and 656268 transitions. Word has length 46 [2021-06-05 16:54:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:33,978 INFO L482 AbstractCegarLoop]: Abstraction has 226798 states and 656268 transitions. [2021-06-05 16:54:33,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 226798 states and 656268 transitions. [2021-06-05 16:54:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:54:34,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:34,321 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:34,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 16:54:34,522 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash -8908162, now seen corresponding path program 203 times [2021-06-05 16:54:34,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:34,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147966731] [2021-06-05 16:54:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:34,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147966731] [2021-06-05 16:54:34,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147966731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:34,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066987898] [2021-06-05 16:54:34,722 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 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 [2021-06-05 16:54:34,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:54:34,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:34,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:34,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066987898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:34,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:34,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 16:54:34,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553455850] [2021-06-05 16:54:34,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:54:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:54:34,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:54:34,992 INFO L87 Difference]: Start difference. First operand 226798 states and 656268 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:36,948 INFO L93 Difference]: Finished difference Result 307138 states and 885982 transitions. [2021-06-05 16:54:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:54:36,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:54:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:37,636 INFO L225 Difference]: With dead ends: 307138 [2021-06-05 16:54:37,636 INFO L226 Difference]: Without dead ends: 307062 [2021-06-05 16:54:37,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:54:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307062 states. [2021-06-05 16:54:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307062 to 227686. [2021-06-05 16:54:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227686 states, 227685 states have (on average 2.8936644926104047) internal successors, (658844), 227685 states have internal predecessors, (658844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227686 states to 227686 states and 658844 transitions. [2021-06-05 16:54:43,160 INFO L78 Accepts]: Start accepts. Automaton has 227686 states and 658844 transitions. Word has length 46 [2021-06-05 16:54:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:43,160 INFO L482 AbstractCegarLoop]: Abstraction has 227686 states and 658844 transitions. [2021-06-05 16:54:43,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 227686 states and 658844 transitions. [2021-06-05 16:54:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:54:44,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:44,308 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:44,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 16:54:44,525 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:44,525 INFO L82 PathProgramCache]: Analyzing trace with hash -534925852, now seen corresponding path program 204 times [2021-06-05 16:54:44,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:44,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985244582] [2021-06-05 16:54:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:44,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:44,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985244582] [2021-06-05 16:54:44,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985244582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:44,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587527475] [2021-06-05 16:54:44,708 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 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 [2021-06-05 16:54:44,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:54:44,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:44,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:54:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:44,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587527475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:44,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:44,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-05 16:54:44,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220726418] [2021-06-05 16:54:44,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:54:44,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:44,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:54:44,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:54:44,961 INFO L87 Difference]: Start difference. First operand 227686 states and 658844 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:46,893 INFO L93 Difference]: Finished difference Result 307114 states and 885933 transitions. [2021-06-05 16:54:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:54:46,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:54:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:47,534 INFO L225 Difference]: With dead ends: 307114 [2021-06-05 16:54:47,534 INFO L226 Difference]: Without dead ends: 307076 [2021-06-05 16:54:47,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:54:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307076 states. [2021-06-05 16:54:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307076 to 227708. [2021-06-05 16:54:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227708 states, 227707 states have (on average 2.8936703746481225) internal successors, (658909), 227707 states have internal predecessors, (658909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227708 states to 227708 states and 658909 transitions. [2021-06-05 16:54:53,136 INFO L78 Accepts]: Start accepts. Automaton has 227708 states and 658909 transitions. Word has length 46 [2021-06-05 16:54:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:53,136 INFO L482 AbstractCegarLoop]: Abstraction has 227708 states and 658909 transitions. [2021-06-05 16:54:53,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 227708 states and 658909 transitions. [2021-06-05 16:54:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:54:53,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:53,488 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:53,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 16:54:53,688 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash 250764184, now seen corresponding path program 205 times [2021-06-05 16:54:53,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:53,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969716356] [2021-06-05 16:54:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:53,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:53,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969716356] [2021-06-05 16:54:53,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969716356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:53,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338218523] [2021-06-05 16:54:53,833 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 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 [2021-06-05 16:54:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:53,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:54:53,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:54,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338218523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:54,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:54,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 16:54:54,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855975290] [2021-06-05 16:54:54,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:54:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:54:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:54:54,097 INFO L87 Difference]: Start difference. First operand 227708 states and 658909 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:56,126 INFO L93 Difference]: Finished difference Result 276784 states and 800858 transitions. [2021-06-05 16:54:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:54:56,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:54:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:56,700 INFO L225 Difference]: With dead ends: 276784 [2021-06-05 16:54:56,700 INFO L226 Difference]: Without dead ends: 276678 [2021-06-05 16:54:56,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:54:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276678 states. [2021-06-05 16:55:01,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276678 to 258936. [2021-06-05 16:55:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258936 states, 258935 states have (on average 2.9008554270376736) internal successors, (751133), 258935 states have internal predecessors, (751133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258936 states to 258936 states and 751133 transitions. [2021-06-05 16:55:02,783 INFO L78 Accepts]: Start accepts. Automaton has 258936 states and 751133 transitions. Word has length 46 [2021-06-05 16:55:02,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:02,783 INFO L482 AbstractCegarLoop]: Abstraction has 258936 states and 751133 transitions. [2021-06-05 16:55:02,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 258936 states and 751133 transitions. [2021-06-05 16:55:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:55:03,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:03,151 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:03,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-05 16:55:03,351 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1527268248, now seen corresponding path program 206 times [2021-06-05 16:55:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:03,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037924761] [2021-06-05 16:55:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:03,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037924761] [2021-06-05 16:55:03,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037924761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787354936] [2021-06-05 16:55:03,523 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 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 [2021-06-05 16:55:03,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:55:03,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:03,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:03,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787354936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:03,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:03,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 16:55:03,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263589173] [2021-06-05 16:55:03,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:55:03,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:03,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:55:03,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:55:03,770 INFO L87 Difference]: Start difference. First operand 258936 states and 751133 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:05,767 INFO L93 Difference]: Finished difference Result 279301 states and 807945 transitions. [2021-06-05 16:55:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:55:05,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:55:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:06,377 INFO L225 Difference]: With dead ends: 279301 [2021-06-05 16:55:06,377 INFO L226 Difference]: Without dead ends: 279177 [2021-06-05 16:55:06,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:55:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279177 states. [2021-06-05 16:55:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279177 to 255508. [2021-06-05 16:55:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255508 states, 255507 states have (on average 2.898515500553801) internal successors, (740591), 255507 states have internal predecessors, (740591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255508 states to 255508 states and 740591 transitions. [2021-06-05 16:55:13,349 INFO L78 Accepts]: Start accepts. Automaton has 255508 states and 740591 transitions. Word has length 46 [2021-06-05 16:55:13,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:13,349 INFO L482 AbstractCegarLoop]: Abstraction has 255508 states and 740591 transitions. [2021-06-05 16:55:13,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 255508 states and 740591 transitions. [2021-06-05 16:55:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:55:13,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:13,930 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:14,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:14,145 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1217093792, now seen corresponding path program 207 times [2021-06-05 16:55:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:14,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426364109] [2021-06-05 16:55:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:14,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426364109] [2021-06-05 16:55:14,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426364109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137094982] [2021-06-05 16:55:14,339 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 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 [2021-06-05 16:55:14,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:55:14,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:14,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:14,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137094982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:14,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:14,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-05 16:55:14,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490171386] [2021-06-05 16:55:14,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:55:14,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:55:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:55:14,671 INFO L87 Difference]: Start difference. First operand 255508 states and 740591 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:17,239 INFO L93 Difference]: Finished difference Result 274555 states and 793544 transitions. [2021-06-05 16:55:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:55:17,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:55:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:17,976 INFO L225 Difference]: With dead ends: 274555 [2021-06-05 16:55:17,976 INFO L226 Difference]: Without dead ends: 274424 [2021-06-05 16:55:17,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 601.5ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:55:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274424 states. [2021-06-05 16:55:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274424 to 253574. [2021-06-05 16:55:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253574 states, 253573 states have (on average 2.8976665496720866) internal successors, (734770), 253573 states have internal predecessors, (734770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253574 states to 253574 states and 734770 transitions. [2021-06-05 16:55:24,347 INFO L78 Accepts]: Start accepts. Automaton has 253574 states and 734770 transitions. Word has length 46 [2021-06-05 16:55:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:24,347 INFO L482 AbstractCegarLoop]: Abstraction has 253574 states and 734770 transitions. [2021-06-05 16:55:24,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 253574 states and 734770 transitions. [2021-06-05 16:55:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:55:24,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:24,766 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:24,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 16:55:24,966 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:24,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:24,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1861204456, now seen corresponding path program 208 times [2021-06-05 16:55:24,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:24,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117167211] [2021-06-05 16:55:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:25,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:25,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117167211] [2021-06-05 16:55:25,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117167211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:25,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552701392] [2021-06-05 16:55:25,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:25,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:55:25,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:25,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:25,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552701392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:25,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:25,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 16:55:25,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349216689] [2021-06-05 16:55:25,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:55:25,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:25,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:55:25,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:55:25,356 INFO L87 Difference]: Start difference. First operand 253574 states and 734770 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:27,146 INFO L93 Difference]: Finished difference Result 271446 states and 784470 transitions. [2021-06-05 16:55:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:55:27,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:55:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:27,739 INFO L225 Difference]: With dead ends: 271446 [2021-06-05 16:55:27,739 INFO L226 Difference]: Without dead ends: 271292 [2021-06-05 16:55:27,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 328.3ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:55:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271292 states. [2021-06-05 16:55:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271292 to 252854. [2021-06-05 16:55:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252854 states, 252853 states have (on average 2.897572898087031) internal successors, (732660), 252853 states have internal predecessors, (732660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:33,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252854 states to 252854 states and 732660 transitions. [2021-06-05 16:55:33,179 INFO L78 Accepts]: Start accepts. Automaton has 252854 states and 732660 transitions. Word has length 46 [2021-06-05 16:55:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:33,179 INFO L482 AbstractCegarLoop]: Abstraction has 252854 states and 732660 transitions. [2021-06-05 16:55:33,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 252854 states and 732660 transitions. [2021-06-05 16:55:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:55:34,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:34,340 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:34,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:34,540 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash -648117152, now seen corresponding path program 209 times [2021-06-05 16:55:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:34,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283345386] [2021-06-05 16:55:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:34,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:34,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283345386] [2021-06-05 16:55:34,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283345386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328770287] [2021-06-05 16:55:34,695 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:34,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:55:34,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:34,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:34,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:34,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328770287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:34,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:34,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-05 16:55:34,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529470985] [2021-06-05 16:55:34,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:55:34,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:34,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:55:34,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:55:34,959 INFO L87 Difference]: Start difference. First operand 252854 states and 732660 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:36,920 INFO L93 Difference]: Finished difference Result 270419 states and 781520 transitions. [2021-06-05 16:55:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:55:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:37,562 INFO L225 Difference]: With dead ends: 270419 [2021-06-05 16:55:37,562 INFO L226 Difference]: Without dead ends: 270343 [2021-06-05 16:55:37,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:55:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270343 states. [2021-06-05 16:55:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270343 to 252092. [2021-06-05 16:55:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252092 states, 252091 states have (on average 2.8975131995985577) internal successors, (730437), 252091 states have internal predecessors, (730437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252092 states to 252092 states and 730437 transitions. [2021-06-05 16:55:43,280 INFO L78 Accepts]: Start accepts. Automaton has 252092 states and 730437 transitions. Word has length 46 [2021-06-05 16:55:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:43,280 INFO L482 AbstractCegarLoop]: Abstraction has 252092 states and 730437 transitions. [2021-06-05 16:55:43,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 252092 states and 730437 transitions. [2021-06-05 16:55:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:55:44,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:44,498 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:44,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:44,724 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:44,724 INFO L82 PathProgramCache]: Analyzing trace with hash 580927768, now seen corresponding path program 210 times [2021-06-05 16:55:44,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:44,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399618762] [2021-06-05 16:55:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:44,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:44,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399618762] [2021-06-05 16:55:44,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399618762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:44,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973710739] [2021-06-05 16:55:44,901 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:44,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:55:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:55:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:55:44,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:45,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973710739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:45,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:45,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-06-05 16:55:45,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673607942] [2021-06-05 16:55:45,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:55:45,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:45,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:55:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:55:45,195 INFO L87 Difference]: Start difference. First operand 252092 states and 730437 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:47,145 INFO L93 Difference]: Finished difference Result 270325 states and 781258 transitions. [2021-06-05 16:55:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:55:47,146 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:55:47,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:47,700 INFO L225 Difference]: With dead ends: 270325 [2021-06-05 16:55:47,701 INFO L226 Difference]: Without dead ends: 270249 [2021-06-05 16:55:47,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:55:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270249 states. [2021-06-05 16:55:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270249 to 252843. [2021-06-05 16:55:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252843 states, 252842 states have (on average 2.8974379256610847) internal successors, (732594), 252842 states have internal predecessors, (732594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252843 states to 252843 states and 732594 transitions. [2021-06-05 16:55:53,256 INFO L78 Accepts]: Start accepts. Automaton has 252843 states and 732594 transitions. Word has length 46 [2021-06-05 16:55:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:55:53,256 INFO L482 AbstractCegarLoop]: Abstraction has 252843 states and 732594 transitions. [2021-06-05 16:55:53,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 252843 states and 732594 transitions. [2021-06-05 16:55:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:55:53,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:55:53,620 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:55:53,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:53,821 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:55:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:55:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash 372500588, now seen corresponding path program 211 times [2021-06-05 16:55:53,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:55:53,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665884741] [2021-06-05 16:55:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:55:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:53,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:55:53,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665884741] [2021-06-05 16:55:53,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665884741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:53,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089894585] [2021-06-05 16:55:53,993 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:55:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:55:54,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:55:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:55:54,932 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 16:55:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:55:54,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089894585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:55:54,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:55:54,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 16:55:54,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806707385] [2021-06-05 16:55:54,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:55:54,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:55:54,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:55:54,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:55:54,986 INFO L87 Difference]: Start difference. First operand 252843 states and 732594 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:55:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:55:56,371 INFO L93 Difference]: Finished difference Result 284097 states and 824904 transitions. [2021-06-05 16:55:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:55:56,372 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:55:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:55:57,906 INFO L225 Difference]: With dead ends: 284097 [2021-06-05 16:55:57,906 INFO L226 Difference]: Without dead ends: 283975 [2021-06-05 16:55:57,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1149.4ms TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:55:58,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283975 states. [2021-06-05 16:56:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283975 to 283015. [2021-06-05 16:56:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283015 states, 283014 states have (on average 2.9055665090772895) internal successors, (822316), 283014 states have internal predecessors, (822316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283015 states to 283015 states and 822316 transitions. [2021-06-05 16:56:05,262 INFO L78 Accepts]: Start accepts. Automaton has 283015 states and 822316 transitions. Word has length 46 [2021-06-05 16:56:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:05,263 INFO L482 AbstractCegarLoop]: Abstraction has 283015 states and 822316 transitions. [2021-06-05 16:56:05,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 283015 states and 822316 transitions. [2021-06-05 16:56:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:56:05,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:05,786 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:05,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 16:56:05,986 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -850429848, now seen corresponding path program 212 times [2021-06-05 16:56:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:05,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948744127] [2021-06-05 16:56:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:06,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948744127] [2021-06-05 16:56:06,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948744127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034942331] [2021-06-05 16:56:06,114 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:06,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:56:06,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:06,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034942331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:06,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:06,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 16:56:06,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784717455] [2021-06-05 16:56:06,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:56:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:06,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:56:06,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:56:06,378 INFO L87 Difference]: Start difference. First operand 283015 states and 822316 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:08,391 INFO L93 Difference]: Finished difference Result 286594 states and 831909 transitions. [2021-06-05 16:56:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:56:08,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:56:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:09,026 INFO L225 Difference]: With dead ends: 286594 [2021-06-05 16:56:09,026 INFO L226 Difference]: Without dead ends: 286464 [2021-06-05 16:56:09,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:56:09,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286464 states. [2021-06-05 16:56:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286464 to 280445. [2021-06-05 16:56:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280445 states, 280444 states have (on average 2.9030644264095504) internal successors, (814147), 280444 states have internal predecessors, (814147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280445 states to 280445 states and 814147 transitions. [2021-06-05 16:56:15,563 INFO L78 Accepts]: Start accepts. Automaton has 280445 states and 814147 transitions. Word has length 46 [2021-06-05 16:56:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:15,563 INFO L482 AbstractCegarLoop]: Abstraction has 280445 states and 814147 transitions. [2021-06-05 16:56:15,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 280445 states and 814147 transitions. [2021-06-05 16:56:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:56:16,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:16,010 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:16,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 16:56:16,210 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash -454634690, now seen corresponding path program 213 times [2021-06-05 16:56:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:16,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302177054] [2021-06-05 16:56:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:16,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:16,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302177054] [2021-06-05 16:56:16,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302177054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:16,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031861115] [2021-06-05 16:56:16,329 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:16,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 16:56:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:56:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:16,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031861115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:16,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:16,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-06-05 16:56:16,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426416666] [2021-06-05 16:56:16,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:56:16,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:16,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:56:16,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:56:16,610 INFO L87 Difference]: Start difference. First operand 280445 states and 814147 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:18,744 INFO L93 Difference]: Finished difference Result 282908 states and 820344 transitions. [2021-06-05 16:56:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:56:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:56:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:19,364 INFO L225 Difference]: With dead ends: 282908 [2021-06-05 16:56:19,364 INFO L226 Difference]: Without dead ends: 282777 [2021-06-05 16:56:19,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 435.3ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:56:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282777 states. [2021-06-05 16:56:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282777 to 277559. [2021-06-05 16:56:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277559 states, 277558 states have (on average 2.903148170832763) internal successors, (805792), 277558 states have internal predecessors, (805792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277559 states to 277559 states and 805792 transitions. [2021-06-05 16:56:25,818 INFO L78 Accepts]: Start accepts. Automaton has 277559 states and 805792 transitions. Word has length 46 [2021-06-05 16:56:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:56:25,818 INFO L482 AbstractCegarLoop]: Abstraction has 277559 states and 805792 transitions. [2021-06-05 16:56:25,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 277559 states and 805792 transitions. [2021-06-05 16:56:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:56:26,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:56:26,265 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:56:26,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:26,466 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:56:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:56:26,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1743048966, now seen corresponding path program 214 times [2021-06-05 16:56:26,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:56:26,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925580353] [2021-06-05 16:56:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:56:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:56:27,387 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-06-05 16:56:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:27,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:56:27,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925580353] [2021-06-05 16:56:27,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925580353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:27,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160149602] [2021-06-05 16:56:27,437 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:56:27,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:56:27,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:56:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:56:27,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:56:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:56:27,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160149602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:56:27,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:56:27,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 16:56:27,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631346284] [2021-06-05 16:56:27,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:56:27,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:56:27,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:56:27,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:56:27,741 INFO L87 Difference]: Start difference. First operand 277559 states and 805792 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:56:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:56:28,992 INFO L93 Difference]: Finished difference Result 278792 states and 808737 transitions. [2021-06-05 16:56:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:56:28,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:56:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:56:30,077 INFO L225 Difference]: With dead ends: 278792 [2021-06-05 16:56:30,077 INFO L226 Difference]: Without dead ends: 278662 [2021-06-05 16:56:30,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1166.7ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:56:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278662 states. Received shutdown request... [2021-06-05 16:56:31,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 16:56:31,565 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:56:31,567 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:56:31,568 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:56:31,569 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:56:31 BasicIcfg [2021-06-05 16:56:31,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:56:31,569 INFO L168 Benchmark]: Toolchain (without parser) took 685716.42 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 327.5 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 6.3 GB. Max. memory is 16.0 GB. [2021-06-05 16:56:31,569 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 348.1 MB. Free memory was 328.7 MB in the beginning and 328.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:56:31,569 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.29 ms. Allocated memory is still 348.1 MB. Free memory was 327.4 MB in the beginning and 326.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:56:31,569 INFO L168 Benchmark]: Boogie Preprocessor took 14.57 ms. Allocated memory is still 348.1 MB. Free memory was 326.0 MB in the beginning and 325.0 MB in the end (delta: 952.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:56:31,569 INFO L168 Benchmark]: RCFGBuilder took 305.88 ms. Allocated memory is still 348.1 MB. Free memory was 324.9 MB in the beginning and 312.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 16:56:31,569 INFO L168 Benchmark]: TraceAbstraction took 685368.31 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 311.9 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 6.3 GB. Max. memory is 16.0 GB. [2021-06-05 16:56:31,570 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 0.13 ms. Allocated memory is still 348.1 MB. Free memory was 328.7 MB in the beginning and 328.6 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.29 ms. Allocated memory is still 348.1 MB. Free memory was 327.4 MB in the beginning and 326.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.57 ms. Allocated memory is still 348.1 MB. Free memory was 326.0 MB in the beginning and 325.0 MB in the end (delta: 952.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 305.88 ms. Allocated memory is still 348.1 MB. Free memory was 324.9 MB in the beginning and 312.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 685368.31 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 311.9 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 6.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 55 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 685206.5ms, OverallIterations: 232, TraceHistogramMax: 4, EmptinessCheckTime: 28305.2ms, AutomataDifference: 201378.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 54.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20932 SDtfs, 43846 SDslu, 185999 SDs, 0 SdLazy, 84066 SolverSat, 4702 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36016.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15535 GetRequests, 8883 SyntacticMatches, 157 SemanticMatches, 6495 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61352 ImplicationChecksByTransitivity, 72555.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=283015occurred in iteration=229, InterpolantAutomatonStates: 6072, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 347789.8ms AutomataMinimizationTime, 232 MinimizatonAttempts, 2501878 StatesRemovedByMinimization, 231 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 895.5ms SsaConstructionTime, 2505.4ms SatisfiabilityAnalysisTime, 53942.1ms InterpolantComputationTime, 16860 NumberOfCodeBlocks, 16857 NumberOfCodeBlocksAsserted, 850 NumberOfCheckSat, 16410 ConstructedInterpolants, 0 QuantifiedInterpolants, 119660 SizeOfPredicates, 899 NumberOfNonLiveVariables, 17547 ConjunctsInSsa, 3672 ConjunctsInUnsatCore, 450 InterpolantComputations, 14 PerfectInterpolantSequences, 2163/9238 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