/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:01:56,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:01:56,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:01:56,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:01:57,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:01:57,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:01:57,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:01:57,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:01:57,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:01:57,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:01:57,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:01:57,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:01:57,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:01:57,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:01:57,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:01:57,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:01:57,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-09 18:01:57,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:01:57,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:01:57,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:01:57,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:01:57,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:01:57,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:01:57,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:01:57,109 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:01:57,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:01:57,109 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:01:57,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:01:57,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:01:57,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:01:57,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:01:57,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:01:57,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:01:57,111 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:01:57,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:01:57,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:01:57,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:01:57,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:01:57,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:01:57,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:01:57,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:01:57,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:01:57,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:01:57,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:01:57,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:01:57,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:01:57,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:01:57,113 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:01:57,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:01:57,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:01:57,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:01:57,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:01:57,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:01:57,408 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:01:57,409 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:01:57,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-07-09 18:01:57,410 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-07-09 18:01:57,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:01:57,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:01:57,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:01:57,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:01:57,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:01:57,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:01:57,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:01:57,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:01:57,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:01:57,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... [2021-07-09 18:01:57,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:01:57,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:01:57,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:01:57,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:01:57,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:01:57,550 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:01:57,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:01:57,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:01:57,551 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:01:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:01:57,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:01:57,551 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:01:57,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:01:57,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:01:57,552 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:01:57,750 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:01:57,750 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:01:57,756 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:01:57 BoogieIcfgContainer [2021-07-09 18:01:57,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:01:57,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:01:57,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:01:57,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:01:57,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:57" (1/2) ... [2021-07-09 18:01:57,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b199fd2 and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:01:57, skipping insertion in model container [2021-07-09 18:01:57,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:01:57" (2/2) ... [2021-07-09 18:01:57,767 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-07-09 18:01:57,775 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:01:57,775 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:01:57,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:01:57,777 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:01:57,839 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:01:57,866 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:01:57,901 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:01:57,901 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:01:57,901 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:01:57,901 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:01:57,901 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:01:57,902 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:01:57,902 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:01:57,902 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:01:57,910 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-07-09 18:01:57,923 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2021-07-09 18:01:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2021-07-09 18:01:57,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:01:57,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:57,932 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:57,933 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:57,942 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-07-09 18:01:57,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:57,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413364434] [2021-07-09 18:01:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:58,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:58,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413364434] [2021-07-09 18:01:58,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413364434] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:58,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:01:58,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:01:58,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332839085] [2021-07-09 18:01:58,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:01:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:58,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:01:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:01:58,111 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:58,181 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-07-09 18:01:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:01:58,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:01:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:58,190 INFO L225 Difference]: With dead ends: 43 [2021-07-09 18:01:58,190 INFO L226 Difference]: Without dead ends: 43 [2021-07-09 18:01:58,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-09 18:01:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-07-09 18:01:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-07-09 18:01:58,223 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-07-09 18:01:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:58,224 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-07-09 18:01:58,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-07-09 18:01:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:01:58,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:58,225 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:58,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:01:58,225 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:58,226 INFO L82 PathProgramCache]: Analyzing trace with hash 759896365, now seen corresponding path program 1 times [2021-07-09 18:01:58,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:58,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427993455] [2021-07-09 18:01:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:58,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:58,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427993455] [2021-07-09 18:01:58,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427993455] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:58,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:01:58,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:01:58,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808179484] [2021-07-09 18:01:58,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:01:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:01:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:01:58,265 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:58,283 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-07-09 18:01:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:01:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:01:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:58,285 INFO L225 Difference]: With dead ends: 50 [2021-07-09 18:01:58,285 INFO L226 Difference]: Without dead ends: 50 [2021-07-09 18:01:58,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-09 18:01:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-07-09 18:01:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-07-09 18:01:58,292 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-07-09 18:01:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:58,292 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-07-09 18:01:58,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-07-09 18:01:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:01:58,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:58,293 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:58,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:01:58,294 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:58,294 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-07-09 18:01:58,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:58,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089087608] [2021-07-09 18:01:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:58,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:58,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089087608] [2021-07-09 18:01:58,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089087608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:58,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304449258] [2021-07-09 18:01:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:58,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:01:58,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:58,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304449258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:58,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:58,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:01:58,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091386482] [2021-07-09 18:01:58,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:01:58,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:58,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:01:58,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:01:58,993 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:59,194 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-07-09 18:01:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:01:59,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-07-09 18:01:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:59,196 INFO L225 Difference]: With dead ends: 108 [2021-07-09 18:01:59,196 INFO L226 Difference]: Without dead ends: 77 [2021-07-09 18:01:59,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:01:59,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-09 18:01:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-07-09 18:01:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-07-09 18:01:59,202 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-07-09 18:01:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:59,202 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-07-09 18:01:59,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-07-09 18:01:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:01:59,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:59,203 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:59,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:01:59,445 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash 242654451, now seen corresponding path program 2 times [2021-07-09 18:01:59,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:59,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133107300] [2021-07-09 18:01:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:59,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:59,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133107300] [2021-07-09 18:01:59,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133107300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288241130] [2021-07-09 18:01:59,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:59,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:59,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:01:59,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288241130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:00,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:02:00,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390044288] [2021-07-09 18:02:00,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:02:00,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:00,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:02:00,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:02:00,012 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:00,378 INFO L93 Difference]: Finished difference Result 130 states and 236 transitions. [2021-07-09 18:02:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:02:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-07-09 18:02:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:00,385 INFO L225 Difference]: With dead ends: 130 [2021-07-09 18:02:00,386 INFO L226 Difference]: Without dead ends: 117 [2021-07-09 18:02:00,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-09 18:02:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2021-07-09 18:02:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-07-09 18:02:00,401 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-07-09 18:02:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:00,401 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-07-09 18:02:00,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-07-09 18:02:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:02:00,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:00,402 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:00,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:00,603 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:00,604 INFO L82 PathProgramCache]: Analyzing trace with hash 892723421, now seen corresponding path program 3 times [2021-07-09 18:02:00,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:00,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467318382] [2021-07-09 18:02:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467318382] [2021-07-09 18:02:00,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467318382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006964405] [2021-07-09 18:02:00,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:00,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:02:00,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:02:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:01,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006964405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:01,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:01,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:02:01,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612392168] [2021-07-09 18:02:01,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:02:01,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:01,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:02:01,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:02:01,049 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:01,276 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-07-09 18:02:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:02:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 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 19 [2021-07-09 18:02:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:01,278 INFO L225 Difference]: With dead ends: 90 [2021-07-09 18:02:01,279 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 18:02:01,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 18:02:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-07-09 18:02:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-07-09 18:02:01,294 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-07-09 18:02:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:01,295 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-07-09 18:02:01,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-07-09 18:02:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:01,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:01,301 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:01,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:01,502 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:01,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:01,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 4 times [2021-07-09 18:02:01,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:01,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424273250] [2021-07-09 18:02:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:01,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:01,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424273250] [2021-07-09 18:02:01,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424273250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:01,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46955364] [2021-07-09 18:02:01,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:01,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:01,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:02,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46955364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:02,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:02,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:02,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300115751] [2021-07-09 18:02:02,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:02,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:02,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:02,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:02,148 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:02,526 INFO L93 Difference]: Finished difference Result 117 states and 220 transitions. [2021-07-09 18:02:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:02:02,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:02,527 INFO L225 Difference]: With dead ends: 117 [2021-07-09 18:02:02,528 INFO L226 Difference]: Without dead ends: 103 [2021-07-09 18:02:02,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:02:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-09 18:02:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2021-07-09 18:02:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-07-09 18:02:02,533 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-07-09 18:02:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:02,534 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-07-09 18:02:02,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-07-09 18:02:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:02,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:02,535 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:02,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:02,753 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1509256847, now seen corresponding path program 5 times [2021-07-09 18:02:02,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:02,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828375952] [2021-07-09 18:02:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:02,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:02,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828375952] [2021-07-09 18:02:02,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828375952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:02,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255188067] [2021-07-09 18:02:02,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:02:03,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:02:03,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:03,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:03,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255188067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:03,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:03,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:03,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147244165] [2021-07-09 18:02:03,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:03,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:03,310 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:03,730 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2021-07-09 18:02:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:02:03,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:03,731 INFO L225 Difference]: With dead ends: 133 [2021-07-09 18:02:03,731 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 18:02:03,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 564.8ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:02:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 18:02:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-07-09 18:02:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-07-09 18:02:03,737 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 21 [2021-07-09 18:02:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:03,737 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-07-09 18:02:03,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-07-09 18:02:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:03,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:03,738 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:03,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 18:02:03,961 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash -859187877, now seen corresponding path program 6 times [2021-07-09 18:02:03,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:03,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093216993] [2021-07-09 18:02:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:04,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:04,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093216993] [2021-07-09 18:02:04,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093216993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:04,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344236933] [2021-07-09 18:02:04,187 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:04,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:02:04,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:04,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:04,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344236933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:04,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:04,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:04,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766873600] [2021-07-09 18:02:04,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:04,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:04,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:04,455 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:04,881 INFO L93 Difference]: Finished difference Result 113 states and 215 transitions. [2021-07-09 18:02:04,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:02:04,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:04,882 INFO L225 Difference]: With dead ends: 113 [2021-07-09 18:02:04,882 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 18:02:04,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:02:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 18:02:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-07-09 18:02:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-07-09 18:02:04,887 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-07-09 18:02:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:04,887 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-07-09 18:02:04,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-07-09 18:02:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:04,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:04,888 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:05,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:05,099 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:05,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1888068795, now seen corresponding path program 7 times [2021-07-09 18:02:05,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:05,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402252848] [2021-07-09 18:02:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:05,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:05,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402252848] [2021-07-09 18:02:05,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402252848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:05,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319939953] [2021-07-09 18:02:05,230 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:05,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:05,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:05,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319939953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:05,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:05,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:05,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102742383] [2021-07-09 18:02:05,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:05,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:05,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:05,471 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:05,790 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2021-07-09 18:02:05,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:02:05,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:05,792 INFO L225 Difference]: With dead ends: 176 [2021-07-09 18:02:05,792 INFO L226 Difference]: Without dead ends: 162 [2021-07-09 18:02:05,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:02:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-09 18:02:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 72. [2021-07-09 18:02:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-07-09 18:02:05,799 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 21 [2021-07-09 18:02:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:05,800 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-07-09 18:02:05,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-07-09 18:02:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:05,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:05,800 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:06,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:06,009 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:06,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1756829531, now seen corresponding path program 8 times [2021-07-09 18:02:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:06,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802236440] [2021-07-09 18:02:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:06,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:06,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802236440] [2021-07-09 18:02:06,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802236440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:06,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742480495] [2021-07-09 18:02:06,136 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:06,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:06,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:06,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742480495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:06,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:06,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:06,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528475701] [2021-07-09 18:02:06,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:06,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:06,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:06,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:06,384 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:06,784 INFO L93 Difference]: Finished difference Result 163 states and 289 transitions. [2021-07-09 18:02:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:02:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:06,785 INFO L225 Difference]: With dead ends: 163 [2021-07-09 18:02:06,785 INFO L226 Difference]: Without dead ends: 149 [2021-07-09 18:02:06,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:02:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-09 18:02:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2021-07-09 18:02:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-07-09 18:02:06,789 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 21 [2021-07-09 18:02:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:06,789 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-07-09 18:02:06,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-07-09 18:02:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:06,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:06,790 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:06,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:02:06,997 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash 477277963, now seen corresponding path program 9 times [2021-07-09 18:02:06,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:06,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337906646] [2021-07-09 18:02:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:07,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337906646] [2021-07-09 18:02:07,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337906646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101844285] [2021-07-09 18:02:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:07,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:02:07,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:07,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:07,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101844285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:07,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:07,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324681168] [2021-07-09 18:02:07,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:07,365 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:07,611 INFO L93 Difference]: Finished difference Result 104 states and 188 transitions. [2021-07-09 18:02:07,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:02:07,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:07,612 INFO L225 Difference]: With dead ends: 104 [2021-07-09 18:02:07,612 INFO L226 Difference]: Without dead ends: 90 [2021-07-09 18:02:07,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:02:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-09 18:02:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-07-09 18:02:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-07-09 18:02:07,615 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-07-09 18:02:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:07,615 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-07-09 18:02:07,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-07-09 18:02:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:07,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:07,616 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:07,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:07,821 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash -362797707, now seen corresponding path program 10 times [2021-07-09 18:02:07,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:07,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375111020] [2021-07-09 18:02:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:07,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:07,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375111020] [2021-07-09 18:02:07,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375111020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:07,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715152152] [2021-07-09 18:02:07,931 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:07,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:07,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:07,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:08,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715152152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:08,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:08,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:08,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620546644] [2021-07-09 18:02:08,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:08,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:08,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:08,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:08,139 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:08,645 INFO L93 Difference]: Finished difference Result 171 states and 307 transitions. [2021-07-09 18:02:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:02:08,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:08,646 INFO L225 Difference]: With dead ends: 171 [2021-07-09 18:02:08,646 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 18:02:08,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:02:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 18:02:08,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 77. [2021-07-09 18:02:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 153 transitions. [2021-07-09 18:02:08,650 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 153 transitions. Word has length 21 [2021-07-09 18:02:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:08,651 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 153 transitions. [2021-07-09 18:02:08,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 153 transitions. [2021-07-09 18:02:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:08,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:08,651 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:08,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:08,861 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 287271263, now seen corresponding path program 11 times [2021-07-09 18:02:08,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:08,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302781485] [2021-07-09 18:02:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:08,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:08,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302781485] [2021-07-09 18:02:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302781485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:08,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102221591] [2021-07-09 18:02:08,969 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:08,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:02:08,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:09,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102221591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:09,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:09,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:09,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199765215] [2021-07-09 18:02:09,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:09,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:09,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:09,214 INFO L87 Difference]: Start difference. First operand 77 states and 153 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:09,735 INFO L93 Difference]: Finished difference Result 171 states and 303 transitions. [2021-07-09 18:02:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:02:09,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:09,736 INFO L225 Difference]: With dead ends: 171 [2021-07-09 18:02:09,736 INFO L226 Difference]: Without dead ends: 157 [2021-07-09 18:02:09,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:02:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-09 18:02:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2021-07-09 18:02:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-07-09 18:02:09,740 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 21 [2021-07-09 18:02:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:09,740 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-07-09 18:02:09,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-07-09 18:02:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:09,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:09,741 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:09,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:02:09,957 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1773588539, now seen corresponding path program 12 times [2021-07-09 18:02:09,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:09,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279468198] [2021-07-09 18:02:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:10,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:10,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279468198] [2021-07-09 18:02:10,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279468198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:10,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771285138] [2021-07-09 18:02:10,069 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:10,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:10,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:10,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:10,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771285138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:10,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:10,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:10,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277288658] [2021-07-09 18:02:10,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:10,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:10,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:10,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:10,289 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:10,697 INFO L93 Difference]: Finished difference Result 139 states and 248 transitions. [2021-07-09 18:02:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:02:10,698 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:10,699 INFO L225 Difference]: With dead ends: 139 [2021-07-09 18:02:10,699 INFO L226 Difference]: Without dead ends: 125 [2021-07-09 18:02:10,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:02:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-09 18:02:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2021-07-09 18:02:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-07-09 18:02:10,702 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-07-09 18:02:10,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:10,702 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-07-09 18:02:10,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-07-09 18:02:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:02:10,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:10,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:10,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:02:10,917 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 13 times [2021-07-09 18:02:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:10,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814319359] [2021-07-09 18:02:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:11,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:11,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814319359] [2021-07-09 18:02:11,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814319359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:11,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937945310] [2021-07-09 18:02:11,031 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:02:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:11,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937945310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:11,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:11,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:02:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776098524] [2021-07-09 18:02:11,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:02:11,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:11,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:02:11,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:11,287 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:11,608 INFO L93 Difference]: Finished difference Result 124 states and 220 transitions. [2021-07-09 18:02:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:02:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 21 [2021-07-09 18:02:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:11,608 INFO L225 Difference]: With dead ends: 124 [2021-07-09 18:02:11,608 INFO L226 Difference]: Without dead ends: 92 [2021-07-09 18:02:11,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:02:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-09 18:02:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-07-09 18:02:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 68 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 131 transitions. [2021-07-09 18:02:11,612 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 131 transitions. Word has length 21 [2021-07-09 18:02:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:11,612 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 131 transitions. [2021-07-09 18:02:11,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 131 transitions. [2021-07-09 18:02:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:11,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:11,612 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:11,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:02:11,825 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1776759271, now seen corresponding path program 14 times [2021-07-09 18:02:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:11,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88269935] [2021-07-09 18:02:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:11,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:11,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88269935] [2021-07-09 18:02:11,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88269935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:11,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362746401] [2021-07-09 18:02:11,975 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:12,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:12,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:12,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:02:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362746401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:12,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:12,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845356138] [2021-07-09 18:02:12,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:12,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:12,234 INFO L87 Difference]: Start difference. First operand 69 states and 131 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:12,575 INFO L93 Difference]: Finished difference Result 120 states and 222 transitions. [2021-07-09 18:02:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:02:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:12,576 INFO L225 Difference]: With dead ends: 120 [2021-07-09 18:02:12,576 INFO L226 Difference]: Without dead ends: 106 [2021-07-09 18:02:12,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 445.3ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:02:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-09 18:02:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2021-07-09 18:02:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-07-09 18:02:12,579 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 23 [2021-07-09 18:02:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:12,579 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-07-09 18:02:12,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-07-09 18:02:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:12,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:12,580 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:12,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:12,789 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:12,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 15 times [2021-07-09 18:02:12,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:12,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683050647] [2021-07-09 18:02:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:12,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683050647] [2021-07-09 18:02:12,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683050647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800328018] [2021-07-09 18:02:12,969 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:13,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:02:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:13,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:13,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800328018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:13,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:13,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:13,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271850041] [2021-07-09 18:02:13,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:13,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:13,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:13,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:13,236 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:14,208 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-07-09 18:02:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:02:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:14,209 INFO L225 Difference]: With dead ends: 225 [2021-07-09 18:02:14,209 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 18:02:14,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 997.3ms TimeCoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:02:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 18:02:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-07-09 18:02:14,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-07-09 18:02:14,213 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-07-09 18:02:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:14,213 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-07-09 18:02:14,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,214 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-07-09 18:02:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:14,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:14,214 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:14,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:02:14,417 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash 380430255, now seen corresponding path program 16 times [2021-07-09 18:02:14,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:14,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602867339] [2021-07-09 18:02:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602867339] [2021-07-09 18:02:14,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602867339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033355436] [2021-07-09 18:02:14,616 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:14,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:14,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:14,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:14,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033355436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:14,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:14,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535433323] [2021-07-09 18:02:14,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:14,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:14,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:14,894 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:16,174 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-07-09 18:02:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:02:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:16,176 INFO L225 Difference]: With dead ends: 293 [2021-07-09 18:02:16,176 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 18:02:16,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1299.0ms TimeCoverageRelationStatistics Valid=557, Invalid=3225, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:02:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 18:02:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-07-09 18:02:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-09 18:02:16,181 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-07-09 18:02:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:16,181 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-09 18:02:16,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-09 18:02:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:16,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:16,182 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:16,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:02:16,393 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash -884497605, now seen corresponding path program 17 times [2021-07-09 18:02:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:16,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646993722] [2021-07-09 18:02:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:16,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:16,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646993722] [2021-07-09 18:02:16,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646993722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:16,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232697332] [2021-07-09 18:02:16,603 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:16,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:02:16,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:16,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:16,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:16,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232697332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:16,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:16,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:16,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637080893] [2021-07-09 18:02:16,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:16,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:16,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:16,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:16,839 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:17,991 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-07-09 18:02:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:02:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:17,992 INFO L225 Difference]: With dead ends: 263 [2021-07-09 18:02:17,992 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 18:02:17,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1150.3ms TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:02:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 18:02:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-07-09 18:02:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-07-09 18:02:17,995 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-07-09 18:02:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:17,995 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-07-09 18:02:17,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-07-09 18:02:17,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:17,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:17,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:18,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:18,202 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash 251687667, now seen corresponding path program 18 times [2021-07-09 18:02:18,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:18,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271793471] [2021-07-09 18:02:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:18,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:18,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271793471] [2021-07-09 18:02:18,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271793471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:18,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536234647] [2021-07-09 18:02:18,355 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:18,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:02:18,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:18,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:18,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536234647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:18,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:18,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565235372] [2021-07-09 18:02:18,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:18,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:18,597 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:19,745 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-07-09 18:02:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:02:19,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:19,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:19,747 INFO L225 Difference]: With dead ends: 280 [2021-07-09 18:02:19,747 INFO L226 Difference]: Without dead ends: 256 [2021-07-09 18:02:19,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1036.7ms TimeCoverageRelationStatistics Valid=546, Invalid=2876, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:02:19,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-09 18:02:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-07-09 18:02:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-07-09 18:02:19,752 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-07-09 18:02:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:19,753 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-07-09 18:02:19,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-07-09 18:02:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:19,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:19,753 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:19,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:19,954 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:19,954 INFO L82 PathProgramCache]: Analyzing trace with hash 901756637, now seen corresponding path program 19 times [2021-07-09 18:02:19,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:19,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042063965] [2021-07-09 18:02:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:20,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:20,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042063965] [2021-07-09 18:02:20,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042063965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:20,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986992786] [2021-07-09 18:02:20,121 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:20,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:20,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986992786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:20,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:20,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:20,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729033544] [2021-07-09 18:02:20,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:20,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:20,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:20,389 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:21,449 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-07-09 18:02:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:02:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:21,451 INFO L225 Difference]: With dead ends: 241 [2021-07-09 18:02:21,451 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 18:02:21,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1060.1ms TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:02:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 18:02:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-07-09 18:02:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-07-09 18:02:21,456 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-07-09 18:02:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:21,456 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-07-09 18:02:21,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-07-09 18:02:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:21,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:21,457 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:21,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:21,677 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1035227257, now seen corresponding path program 20 times [2021-07-09 18:02:21,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:21,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994906735] [2021-07-09 18:02:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:21,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:21,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994906735] [2021-07-09 18:02:21,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994906735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869887656] [2021-07-09 18:02:21,867 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:21,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:21,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:21,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:21,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:22,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869887656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:22,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:22,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:22,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306579981] [2021-07-09 18:02:22,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:22,110 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:23,612 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-07-09 18:02:23,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:02:23,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:23,613 INFO L225 Difference]: With dead ends: 342 [2021-07-09 18:02:23,613 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 18:02:23,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1391.6ms TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:02:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 18:02:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-07-09 18:02:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-07-09 18:02:23,619 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-07-09 18:02:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:23,619 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-07-09 18:02:23,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-07-09 18:02:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:23,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:23,620 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:23,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:02:23,837 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -229700603, now seen corresponding path program 21 times [2021-07-09 18:02:23,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:23,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175305236] [2021-07-09 18:02:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:24,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:24,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175305236] [2021-07-09 18:02:24,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175305236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:24,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304064105] [2021-07-09 18:02:24,013 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:24,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:02:24,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:24,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:02:24,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304064105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:24,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:24,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:24,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897824595] [2021-07-09 18:02:24,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:24,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:24,277 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:25,701 INFO L93 Difference]: Finished difference Result 335 states and 651 transitions. [2021-07-09 18:02:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:02:25,701 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:25,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:25,702 INFO L225 Difference]: With dead ends: 335 [2021-07-09 18:02:25,702 INFO L226 Difference]: Without dead ends: 315 [2021-07-09 18:02:25,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1363.9ms TimeCoverageRelationStatistics Valid=546, Invalid=2994, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:02:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-09 18:02:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 154. [2021-07-09 18:02:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.261437908496732) internal successors, (346), 153 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 346 transitions. [2021-07-09 18:02:25,708 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 346 transitions. Word has length 23 [2021-07-09 18:02:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:25,708 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 346 transitions. [2021-07-09 18:02:25,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,708 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 346 transitions. [2021-07-09 18:02:25,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:25,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:25,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:25,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:02:25,921 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:25,921 INFO L82 PathProgramCache]: Analyzing trace with hash 906484669, now seen corresponding path program 22 times [2021-07-09 18:02:25,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:25,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066314506] [2021-07-09 18:02:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:26,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:26,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066314506] [2021-07-09 18:02:26,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066314506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:26,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982935097] [2021-07-09 18:02:26,078 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:26,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:26,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:26,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:26,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:26,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982935097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:26,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:26,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:26,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982147219] [2021-07-09 18:02:26,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:26,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:26,344 INFO L87 Difference]: Start difference. First operand 154 states and 346 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:27,605 INFO L93 Difference]: Finished difference Result 324 states and 640 transitions. [2021-07-09 18:02:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:02:27,605 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:27,606 INFO L225 Difference]: With dead ends: 324 [2021-07-09 18:02:27,607 INFO L226 Difference]: Without dead ends: 307 [2021-07-09 18:02:27,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1248.3ms TimeCoverageRelationStatistics Valid=560, Invalid=2746, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:02:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-09 18:02:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 149. [2021-07-09 18:02:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.2635135135135136) internal successors, (335), 148 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2021-07-09 18:02:27,612 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 23 [2021-07-09 18:02:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:27,612 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2021-07-09 18:02:27,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2021-07-09 18:02:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:27,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:27,613 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:27,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:27,829 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:27,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1644322069, now seen corresponding path program 23 times [2021-07-09 18:02:27,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:27,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206833956] [2021-07-09 18:02:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:28,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:28,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206833956] [2021-07-09 18:02:28,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206833956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:28,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490331565] [2021-07-09 18:02:28,006 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:28,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:28,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:28,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:02:28,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:28,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490331565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:28,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:28,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613910124] [2021-07-09 18:02:28,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:28,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:28,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:28,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:28,299 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:29,593 INFO L93 Difference]: Finished difference Result 335 states and 686 transitions. [2021-07-09 18:02:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:02:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:29,595 INFO L225 Difference]: With dead ends: 335 [2021-07-09 18:02:29,595 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 18:02:29,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1268.3ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:02:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 18:02:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 176. [2021-07-09 18:02:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2914285714285714) internal successors, (401), 175 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 401 transitions. [2021-07-09 18:02:29,601 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 401 transitions. Word has length 23 [2021-07-09 18:02:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:29,601 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 401 transitions. [2021-07-09 18:02:29,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 401 transitions. [2021-07-09 18:02:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:29,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:29,602 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:29,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:02:29,817 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:29,817 INFO L82 PathProgramCache]: Analyzing trace with hash -949311587, now seen corresponding path program 24 times [2021-07-09 18:02:29,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:29,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374383084] [2021-07-09 18:02:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:29,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:29,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374383084] [2021-07-09 18:02:29,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374383084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:29,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368812830] [2021-07-09 18:02:29,962 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:29,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:29,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:29,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:02:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:30,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368812830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:30,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:30,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:02:30,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326296425] [2021-07-09 18:02:30,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:30,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:30,214 INFO L87 Difference]: Start difference. First operand 176 states and 401 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:31,281 INFO L93 Difference]: Finished difference Result 418 states and 882 transitions. [2021-07-09 18:02:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:02:31,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:31,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:31,283 INFO L225 Difference]: With dead ends: 418 [2021-07-09 18:02:31,283 INFO L226 Difference]: Without dead ends: 404 [2021-07-09 18:02:31,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1035.1ms TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:02:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-09 18:02:31,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 193. [2021-07-09 18:02:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3541666666666665) internal successors, (452), 192 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 452 transitions. [2021-07-09 18:02:31,290 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 452 transitions. Word has length 23 [2021-07-09 18:02:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:31,290 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 452 transitions. [2021-07-09 18:02:31,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:31,290 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 452 transitions. [2021-07-09 18:02:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:31,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:31,291 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:31,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:31,505 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:31,505 INFO L82 PathProgramCache]: Analyzing trace with hash 45870327, now seen corresponding path program 25 times [2021-07-09 18:02:31,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:31,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122492466] [2021-07-09 18:02:31,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122492466] [2021-07-09 18:02:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122492466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:31,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973571428] [2021-07-09 18:02:31,630 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:31,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:31,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973571428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:31,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:31,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:02:31,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646692765] [2021-07-09 18:02:31,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:31,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:31,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:31,872 INFO L87 Difference]: Start difference. First operand 193 states and 452 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-07-09 18:02:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:32,695 INFO L93 Difference]: Finished difference Result 441 states and 930 transitions. [2021-07-09 18:02:32,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:02:32,696 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 25 [2021-07-09 18:02:32,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:32,697 INFO L225 Difference]: With dead ends: 441 [2021-07-09 18:02:32,697 INFO L226 Difference]: Without dead ends: 420 [2021-07-09 18:02:32,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 736.5ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:02:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-09 18:02:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 228. [2021-07-09 18:02:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-07-09 18:02:32,704 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-07-09 18:02:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:32,704 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-07-09 18:02:32,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-07-09 18:02:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-07-09 18:02:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:32,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:32,705 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:32,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:02:32,927 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash 695939297, now seen corresponding path program 26 times [2021-07-09 18:02:32,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:32,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413447730] [2021-07-09 18:02:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:33,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:33,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413447730] [2021-07-09 18:02:33,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413447730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506763387] [2021-07-09 18:02:33,049 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:33,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:33,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:33,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:33,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506763387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:33,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:33,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:02:33,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004905298] [2021-07-09 18:02:33,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:33,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:33,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:33,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:33,288 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-07-09 18:02:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:34,194 INFO L93 Difference]: Finished difference Result 450 states and 937 transitions. [2021-07-09 18:02:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:02:34,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 25 [2021-07-09 18:02:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:34,196 INFO L225 Difference]: With dead ends: 450 [2021-07-09 18:02:34,196 INFO L226 Difference]: Without dead ends: 429 [2021-07-09 18:02:34,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:02:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-09 18:02:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 228. [2021-07-09 18:02:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-07-09 18:02:34,203 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-07-09 18:02:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:34,203 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-07-09 18:02:34,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-07-09 18:02:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-07-09 18:02:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:34,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:34,204 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:34,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:34,417 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1364920505, now seen corresponding path program 27 times [2021-07-09 18:02:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:34,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125405022] [2021-07-09 18:02:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:34,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:34,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125405022] [2021-07-09 18:02:34,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125405022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:34,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480428969] [2021-07-09 18:02:34,535 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:34,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:02:34,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:34,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:34,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480428969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:34,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:34,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:02:34,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820479407] [2021-07-09 18:02:34,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:02:34,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:02:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:02:34,793 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-07-09 18:02:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:35,552 INFO L93 Difference]: Finished difference Result 320 states and 692 transitions. [2021-07-09 18:02:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:02:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 25 [2021-07-09 18:02:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:35,553 INFO L225 Difference]: With dead ends: 320 [2021-07-09 18:02:35,553 INFO L226 Difference]: Without dead ends: 299 [2021-07-09 18:02:35,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 758.6ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:02:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-09 18:02:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 230. [2021-07-09 18:02:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.4017467248908297) internal successors, (550), 229 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 550 transitions. [2021-07-09 18:02:35,559 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 550 transitions. Word has length 25 [2021-07-09 18:02:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:35,559 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 550 transitions. [2021-07-09 18:02:35,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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) [2021-07-09 18:02:35,559 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 550 transitions. [2021-07-09 18:02:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:35,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:35,560 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:35,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:02:35,782 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:35,783 INFO L82 PathProgramCache]: Analyzing trace with hash 740880809, now seen corresponding path program 28 times [2021-07-09 18:02:35,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:35,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866828604] [2021-07-09 18:02:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:35,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:35,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866828604] [2021-07-09 18:02:35,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866828604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:35,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532550061] [2021-07-09 18:02:35,889 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:35,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:35,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:35,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:36,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532550061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:36,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:36,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:36,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282696624] [2021-07-09 18:02:36,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:36,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:36,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:36,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:36,172 INFO L87 Difference]: Start difference. First operand 230 states and 550 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:37,369 INFO L93 Difference]: Finished difference Result 676 states and 1412 transitions. [2021-07-09 18:02:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:02:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:37,372 INFO L225 Difference]: With dead ends: 676 [2021-07-09 18:02:37,372 INFO L226 Difference]: Without dead ends: 635 [2021-07-09 18:02:37,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1028.3ms TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:02:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-07-09 18:02:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 344. [2021-07-09 18:02:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.498542274052478) internal successors, (857), 343 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 857 transitions. [2021-07-09 18:02:37,380 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 857 transitions. Word has length 25 [2021-07-09 18:02:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:37,380 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 857 transitions. [2021-07-09 18:02:37,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 857 transitions. [2021-07-09 18:02:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:37,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:37,381 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:37,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:37,597 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:37,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:37,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1390949779, now seen corresponding path program 29 times [2021-07-09 18:02:37,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:37,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107628451] [2021-07-09 18:02:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:37,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:37,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107628451] [2021-07-09 18:02:37,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107628451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:37,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586524696] [2021-07-09 18:02:37,710 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:37,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:02:37,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:37,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:37,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:37,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586524696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:37,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:37,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:37,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399283646] [2021-07-09 18:02:37,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:37,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:37,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:37,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:37,987 INFO L87 Difference]: Start difference. First operand 344 states and 857 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:39,235 INFO L93 Difference]: Finished difference Result 642 states and 1345 transitions. [2021-07-09 18:02:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:02:39,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:39,237 INFO L225 Difference]: With dead ends: 642 [2021-07-09 18:02:39,237 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 18:02:39,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1155.7ms TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:02:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 18:02:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 305. [2021-07-09 18:02:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.4309210526315788) internal successors, (739), 304 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 739 transitions. [2021-07-09 18:02:39,246 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 739 transitions. Word has length 25 [2021-07-09 18:02:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:39,246 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 739 transitions. [2021-07-09 18:02:39,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 739 transitions. [2021-07-09 18:02:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:39,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:39,247 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:39,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:02:39,453 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -669910023, now seen corresponding path program 30 times [2021-07-09 18:02:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:39,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130169016] [2021-07-09 18:02:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:39,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:39,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130169016] [2021-07-09 18:02:39,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130169016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:39,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963040139] [2021-07-09 18:02:39,557 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:39,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:02:39,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:39,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:39,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:39,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963040139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:39,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:39,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:39,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916614022] [2021-07-09 18:02:39,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:39,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:39,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:39,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:39,840 INFO L87 Difference]: Start difference. First operand 305 states and 739 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:40,723 INFO L93 Difference]: Finished difference Result 433 states and 956 transitions. [2021-07-09 18:02:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:02:40,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:40,725 INFO L225 Difference]: With dead ends: 433 [2021-07-09 18:02:40,725 INFO L226 Difference]: Without dead ends: 412 [2021-07-09 18:02:40,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 783.7ms TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:02:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-07-09 18:02:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-07-09 18:02:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.4372881355932203) internal successors, (719), 295 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 719 transitions. [2021-07-09 18:02:40,732 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 719 transitions. Word has length 25 [2021-07-09 18:02:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:40,732 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 719 transitions. [2021-07-09 18:02:40,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 719 transitions. [2021-07-09 18:02:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:40,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:40,733 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:40,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:40,949 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash -271811723, now seen corresponding path program 31 times [2021-07-09 18:02:40,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:40,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031505815] [2021-07-09 18:02:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:41,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:41,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031505815] [2021-07-09 18:02:41,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031505815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:41,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235287790] [2021-07-09 18:02:41,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:41,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:41,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235287790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:41,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:41,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:41,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831776423] [2021-07-09 18:02:41,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:41,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:41,305 INFO L87 Difference]: Start difference. First operand 296 states and 719 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:42,765 INFO L93 Difference]: Finished difference Result 836 states and 1776 transitions. [2021-07-09 18:02:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:02:42,766 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:42,768 INFO L225 Difference]: With dead ends: 836 [2021-07-09 18:02:42,768 INFO L226 Difference]: Without dead ends: 792 [2021-07-09 18:02:42,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1278.4ms TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:02:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-07-09 18:02:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 410. [2021-07-09 18:02:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.5623471882640585) internal successors, (1048), 409 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1048 transitions. [2021-07-09 18:02:42,779 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1048 transitions. Word has length 25 [2021-07-09 18:02:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:42,779 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1048 transitions. [2021-07-09 18:02:42,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1048 transitions. [2021-07-09 18:02:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:42,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:42,781 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:43,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:02:43,003 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 378257247, now seen corresponding path program 32 times [2021-07-09 18:02:43,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:43,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853486173] [2021-07-09 18:02:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:43,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853486173] [2021-07-09 18:02:43,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853486173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:43,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961270792] [2021-07-09 18:02:43,123 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:43,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:43,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:43,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:43,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961270792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:43,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:43,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:43,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034043831] [2021-07-09 18:02:43,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:43,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:43,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:43,412 INFO L87 Difference]: Start difference. First operand 410 states and 1048 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:45,006 INFO L93 Difference]: Finished difference Result 801 states and 1700 transitions. [2021-07-09 18:02:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:02:45,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:45,009 INFO L225 Difference]: With dead ends: 801 [2021-07-09 18:02:45,009 INFO L226 Difference]: Without dead ends: 766 [2021-07-09 18:02:45,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1448.9ms TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:02:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-07-09 18:02:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 300. [2021-07-09 18:02:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.5050167224080266) internal successors, (749), 299 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 749 transitions. [2021-07-09 18:02:45,017 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 749 transitions. Word has length 25 [2021-07-09 18:02:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:45,017 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 749 transitions. [2021-07-09 18:02:45,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 749 transitions. [2021-07-09 18:02:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:45,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:45,018 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:45,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:02:45,233 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1682602555, now seen corresponding path program 33 times [2021-07-09 18:02:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:45,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509440019] [2021-07-09 18:02:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:45,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:45,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509440019] [2021-07-09 18:02:45,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509440019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:45,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290307212] [2021-07-09 18:02:45,361 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:45,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:02:45,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:45,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:45,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:45,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290307212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:45,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:45,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:45,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635170985] [2021-07-09 18:02:45,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:45,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:45,661 INFO L87 Difference]: Start difference. First operand 300 states and 749 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:46,795 INFO L93 Difference]: Finished difference Result 499 states and 1080 transitions. [2021-07-09 18:02:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:02:46,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:46,797 INFO L225 Difference]: With dead ends: 499 [2021-07-09 18:02:46,797 INFO L226 Difference]: Without dead ends: 478 [2021-07-09 18:02:46,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:02:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-09 18:02:46,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2021-07-09 18:02:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.5187713310580206) internal successors, (738), 293 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 738 transitions. [2021-07-09 18:02:46,803 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 738 transitions. Word has length 25 [2021-07-09 18:02:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:46,803 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 738 transitions. [2021-07-09 18:02:46,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 738 transitions. [2021-07-09 18:02:46,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:46,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:46,804 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:47,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:02:47,009 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 34 times [2021-07-09 18:02:47,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:47,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930839576] [2021-07-09 18:02:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:47,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:47,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930839576] [2021-07-09 18:02:47,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930839576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:47,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389640898] [2021-07-09 18:02:47,118 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:47,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:47,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:47,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:47,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:47,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389640898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:47,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:47,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:47,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609946010] [2021-07-09 18:02:47,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:47,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:47,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:47,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:47,384 INFO L87 Difference]: Start difference. First operand 294 states and 738 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:48,182 INFO L93 Difference]: Finished difference Result 435 states and 957 transitions. [2021-07-09 18:02:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:02:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:48,190 INFO L225 Difference]: With dead ends: 435 [2021-07-09 18:02:48,190 INFO L226 Difference]: Without dead ends: 382 [2021-07-09 18:02:48,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 749.2ms TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:02:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-09 18:02:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 286. [2021-07-09 18:02:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.389473684210526) internal successors, (681), 285 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 681 transitions. [2021-07-09 18:02:48,196 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 681 transitions. Word has length 25 [2021-07-09 18:02:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:48,197 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 681 transitions. [2021-07-09 18:02:48,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 681 transitions. [2021-07-09 18:02:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:48,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:48,198 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:48,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:02:48,420 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2090603063, now seen corresponding path program 35 times [2021-07-09 18:02:48,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:48,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064175830] [2021-07-09 18:02:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:48,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064175830] [2021-07-09 18:02:48,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064175830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:48,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907806147] [2021-07-09 18:02:48,524 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:48,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:02:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:48,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:48,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907806147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:48,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:48,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:48,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721166219] [2021-07-09 18:02:48,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:48,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:48,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:48,801 INFO L87 Difference]: Start difference. First operand 286 states and 681 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:49,795 INFO L93 Difference]: Finished difference Result 526 states and 1119 transitions. [2021-07-09 18:02:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:02:49,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:49,797 INFO L225 Difference]: With dead ends: 526 [2021-07-09 18:02:49,797 INFO L226 Difference]: Without dead ends: 447 [2021-07-09 18:02:49,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 900.1ms TimeCoverageRelationStatistics Valid=403, Invalid=2789, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:02:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-09 18:02:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-07-09 18:02:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.3015384615384615) internal successors, (748), 325 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 748 transitions. [2021-07-09 18:02:49,804 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 748 transitions. Word has length 25 [2021-07-09 18:02:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:49,804 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 748 transitions. [2021-07-09 18:02:49,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 748 transitions. [2021-07-09 18:02:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:49,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:49,805 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:50,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:50,021 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:50,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1554295263, now seen corresponding path program 36 times [2021-07-09 18:02:50,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:50,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384731968] [2021-07-09 18:02:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:50,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:50,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384731968] [2021-07-09 18:02:50,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384731968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:50,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545022839] [2021-07-09 18:02:50,131 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:50,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:02:50,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:50,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:50,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:50,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545022839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:50,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:50,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:50,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245893236] [2021-07-09 18:02:50,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:50,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:50,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:50,377 INFO L87 Difference]: Start difference. First operand 326 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:51,260 INFO L93 Difference]: Finished difference Result 471 states and 986 transitions. [2021-07-09 18:02:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:02:51,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:51,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:51,262 INFO L225 Difference]: With dead ends: 471 [2021-07-09 18:02:51,265 INFO L226 Difference]: Without dead ends: 441 [2021-07-09 18:02:51,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 893.9ms TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:02:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-09 18:02:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 285. [2021-07-09 18:02:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.3204225352112675) internal successors, (659), 284 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 659 transitions. [2021-07-09 18:02:51,270 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 659 transitions. Word has length 25 [2021-07-09 18:02:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:51,270 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 659 transitions. [2021-07-09 18:02:51,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 659 transitions. [2021-07-09 18:02:51,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:51,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:51,270 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:51,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 18:02:51,471 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:51,471 INFO L82 PathProgramCache]: Analyzing trace with hash 679812231, now seen corresponding path program 37 times [2021-07-09 18:02:51,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:51,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496572345] [2021-07-09 18:02:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:51,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:51,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496572345] [2021-07-09 18:02:51,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496572345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:51,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895522473] [2021-07-09 18:02:51,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:51,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:51,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895522473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:51,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:51,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:51,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758313363] [2021-07-09 18:02:51,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:51,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:51,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:51,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:51,819 INFO L87 Difference]: Start difference. First operand 285 states and 659 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:52,382 INFO L93 Difference]: Finished difference Result 371 states and 801 transitions. [2021-07-09 18:02:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:02:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:52,383 INFO L225 Difference]: With dead ends: 371 [2021-07-09 18:02:52,383 INFO L226 Difference]: Without dead ends: 357 [2021-07-09 18:02:52,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:02:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-09 18:02:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 289. [2021-07-09 18:02:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3194444444444446) internal successors, (668), 288 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 668 transitions. [2021-07-09 18:02:52,389 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 668 transitions. Word has length 25 [2021-07-09 18:02:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:52,389 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 668 transitions. [2021-07-09 18:02:52,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:52,390 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 668 transitions. [2021-07-09 18:02:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:52,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:52,390 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:52,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:02:52,605 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -332880301, now seen corresponding path program 38 times [2021-07-09 18:02:52,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:52,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524717618] [2021-07-09 18:02:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:52,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:52,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524717618] [2021-07-09 18:02:52,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524717618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:52,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977648790] [2021-07-09 18:02:52,701 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:52,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:52,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:52,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:52,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:52,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977648790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:52,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:52,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:52,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80885344] [2021-07-09 18:02:52,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:52,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:52,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:52,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:52,973 INFO L87 Difference]: Start difference. First operand 289 states and 668 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:53,800 INFO L93 Difference]: Finished difference Result 434 states and 912 transitions. [2021-07-09 18:02:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:02:53,800 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:53,801 INFO L225 Difference]: With dead ends: 434 [2021-07-09 18:02:53,801 INFO L226 Difference]: Without dead ends: 413 [2021-07-09 18:02:53,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 875.2ms TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:02:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-09 18:02:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 289. [2021-07-09 18:02:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3229166666666665) internal successors, (669), 288 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 669 transitions. [2021-07-09 18:02:53,807 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 669 transitions. Word has length 25 [2021-07-09 18:02:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:53,807 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 669 transitions. [2021-07-09 18:02:53,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 669 transitions. [2021-07-09 18:02:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:53,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:53,808 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:54,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:54,029 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:54,029 INFO L82 PathProgramCache]: Analyzing trace with hash -868110103, now seen corresponding path program 39 times [2021-07-09 18:02:54,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:54,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789679125] [2021-07-09 18:02:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:54,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:54,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789679125] [2021-07-09 18:02:54,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789679125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:54,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162835437] [2021-07-09 18:02:54,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:54,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:02:54,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:54,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:54,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162835437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:54,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:54,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:02:54,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665940011] [2021-07-09 18:02:54,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:54,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:54,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:54,444 INFO L87 Difference]: Start difference. First operand 289 states and 669 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:55,140 INFO L93 Difference]: Finished difference Result 408 states and 870 transitions. [2021-07-09 18:02:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:02:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 25 [2021-07-09 18:02:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:55,142 INFO L225 Difference]: With dead ends: 408 [2021-07-09 18:02:55,142 INFO L226 Difference]: Without dead ends: 355 [2021-07-09 18:02:55,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 741.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:02:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-09 18:02:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 281. [2021-07-09 18:02:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.307142857142857) internal successors, (646), 280 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 646 transitions. [2021-07-09 18:02:55,148 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 646 transitions. Word has length 25 [2021-07-09 18:02:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:55,149 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 646 transitions. [2021-07-09 18:02:55,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-07-09 18:02:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 646 transitions. [2021-07-09 18:02:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:55,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:55,150 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:55,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:02:55,365 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:55,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1839386049, now seen corresponding path program 40 times [2021-07-09 18:02:55,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:55,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966712995] [2021-07-09 18:02:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:55,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966712995] [2021-07-09 18:02:55,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966712995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521297689] [2021-07-09 18:02:55,598 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:55,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:55,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:55,623 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:55,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:55,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521297689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:55,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:55,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:02:55,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231202320] [2021-07-09 18:02:55,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:55,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:55,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:55,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:55,950 INFO L87 Difference]: Start difference. First operand 281 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-07-09 18:02:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:58,128 INFO L93 Difference]: Finished difference Result 487 states and 1044 transitions. [2021-07-09 18:02:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:02:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-07-09 18:02:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:58,129 INFO L225 Difference]: With dead ends: 487 [2021-07-09 18:02:58,129 INFO L226 Difference]: Without dead ends: 473 [2021-07-09 18:02:58,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2149.3ms TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:02:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-09 18:02:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 299. [2021-07-09 18:02:58,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.291946308724832) internal successors, (683), 298 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 683 transitions. [2021-07-09 18:02:58,135 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 683 transitions. Word has length 25 [2021-07-09 18:02:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:58,135 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 683 transitions. [2021-07-09 18:02:58,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-07-09 18:02:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 683 transitions. [2021-07-09 18:02:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:02:58,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:58,136 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:58,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:58,341 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1319395975, now seen corresponding path program 41 times [2021-07-09 18:02:58,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:58,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389424463] [2021-07-09 18:02:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:58,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389424463] [2021-07-09 18:02:58,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389424463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106242003] [2021-07-09 18:02:58,524 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:58,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:58,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:58,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:02:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106242003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:58,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:02:58,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344728476] [2021-07-09 18:02:58,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:02:58,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:02:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:58,877 INFO L87 Difference]: Start difference. First operand 299 states and 683 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-07-09 18:03:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:01,219 INFO L93 Difference]: Finished difference Result 516 states and 1115 transitions. [2021-07-09 18:03:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:03:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-07-09 18:03:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:01,221 INFO L225 Difference]: With dead ends: 516 [2021-07-09 18:03:01,221 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 18:03:01,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2277.4ms TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:03:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 18:03:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 301. [2021-07-09 18:03:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3) internal successors, (690), 300 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:01,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 690 transitions. [2021-07-09 18:03:01,227 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 690 transitions. Word has length 25 [2021-07-09 18:03:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:01,227 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 690 transitions. [2021-07-09 18:03:01,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-07-09 18:03:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 690 transitions. [2021-07-09 18:03:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:01,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:01,228 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:01,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:03:01,450 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 42 times [2021-07-09 18:03:01,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:01,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673182887] [2021-07-09 18:03:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:01,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673182887] [2021-07-09 18:03:01,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673182887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:01,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851812435] [2021-07-09 18:03:01,680 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:01,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:03:01,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:01,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:03:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:01,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851812435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:01,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:01,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:03:01,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384796336] [2021-07-09 18:03:01,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:03:01,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:01,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:03:01,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:03:01,998 INFO L87 Difference]: Start difference. First operand 301 states and 690 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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) [2021-07-09 18:03:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:03,134 INFO L93 Difference]: Finished difference Result 558 states and 1181 transitions. [2021-07-09 18:03:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:03:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 27 [2021-07-09 18:03:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:03,136 INFO L225 Difference]: With dead ends: 558 [2021-07-09 18:03:03,136 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 18:03:03,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1261.9ms TimeCoverageRelationStatistics Valid=566, Invalid=3724, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:03:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 18:03:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 367. [2021-07-09 18:03:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.3524590163934427) internal successors, (861), 366 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 861 transitions. [2021-07-09 18:03:03,142 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 861 transitions. Word has length 27 [2021-07-09 18:03:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:03,142 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 861 transitions. [2021-07-09 18:03:03,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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) [2021-07-09 18:03:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 861 transitions. [2021-07-09 18:03:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:03,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:03,143 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:03,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:03,365 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:03,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1087323029, now seen corresponding path program 43 times [2021-07-09 18:03:03,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:03,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399402150] [2021-07-09 18:03:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:03,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:03,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399402150] [2021-07-09 18:03:03,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399402150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:03,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323703878] [2021-07-09 18:03:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:03,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:03,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:03,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323703878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:03,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:03,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:03,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545921459] [2021-07-09 18:03:03,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:03,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:03,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:03,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:03,870 INFO L87 Difference]: Start difference. First operand 367 states and 861 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:05,062 INFO L93 Difference]: Finished difference Result 582 states and 1226 transitions. [2021-07-09 18:03:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:03:05,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:05,063 INFO L225 Difference]: With dead ends: 582 [2021-07-09 18:03:05,064 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 18:03:05,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=636, Invalid=4194, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:03:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 18:03:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 370. [2021-07-09 18:03:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.3495934959349594) internal successors, (867), 369 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) [2021-07-09 18:03:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 867 transitions. [2021-07-09 18:03:05,071 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 867 transitions. Word has length 27 [2021-07-09 18:03:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:05,071 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 867 transitions. [2021-07-09 18:03:05,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 867 transitions. [2021-07-09 18:03:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:05,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:05,072 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:05,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:03:05,293 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash -254898513, now seen corresponding path program 44 times [2021-07-09 18:03:05,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:05,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733432824] [2021-07-09 18:03:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:05,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:05,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733432824] [2021-07-09 18:03:05,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733432824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:05,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890288970] [2021-07-09 18:03:05,487 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:05,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:05,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:05,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:05,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:05,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890288970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:05,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:05,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:05,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794047120] [2021-07-09 18:03:05,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:05,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:05,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:05,759 INFO L87 Difference]: Start difference. First operand 370 states and 867 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:07,304 INFO L93 Difference]: Finished difference Result 675 states and 1384 transitions. [2021-07-09 18:03:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:03:07,304 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:07,306 INFO L225 Difference]: With dead ends: 675 [2021-07-09 18:03:07,306 INFO L226 Difference]: Without dead ends: 636 [2021-07-09 18:03:07,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1426.4ms TimeCoverageRelationStatistics Valid=733, Invalid=4817, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:03:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-07-09 18:03:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 376. [2021-07-09 18:03:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.3573333333333335) internal successors, (884), 375 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 884 transitions. [2021-07-09 18:03:07,312 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 884 transitions. Word has length 27 [2021-07-09 18:03:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:07,312 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 884 transitions. [2021-07-09 18:03:07,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 884 transitions. [2021-07-09 18:03:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:07,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:07,315 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:07,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:03:07,517 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1519826373, now seen corresponding path program 45 times [2021-07-09 18:03:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:07,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226732237] [2021-07-09 18:03:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:07,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226732237] [2021-07-09 18:03:07,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226732237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811664270] [2021-07-09 18:03:07,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:07,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:03:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:07,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:03:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:08,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811664270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:08,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:08,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:08,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891456080] [2021-07-09 18:03:08,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:08,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:08,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:08,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:08,062 INFO L87 Difference]: Start difference. First operand 376 states and 884 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:09,631 INFO L93 Difference]: Finished difference Result 647 states and 1333 transitions. [2021-07-09 18:03:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:03:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:09,634 INFO L225 Difference]: With dead ends: 647 [2021-07-09 18:03:09,634 INFO L226 Difference]: Without dead ends: 620 [2021-07-09 18:03:09,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 1504.2ms TimeCoverageRelationStatistics Valid=718, Invalid=4684, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:03:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-07-09 18:03:09,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 389. [2021-07-09 18:03:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.3556701030927836) internal successors, (914), 388 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 914 transitions. [2021-07-09 18:03:09,640 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 914 transitions. Word has length 27 [2021-07-09 18:03:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:09,640 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 914 transitions. [2021-07-09 18:03:09,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 914 transitions. [2021-07-09 18:03:09,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:09,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:09,641 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:09,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:09,857 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash -383641101, now seen corresponding path program 46 times [2021-07-09 18:03:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:09,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950698624] [2021-07-09 18:03:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:10,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:10,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950698624] [2021-07-09 18:03:10,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950698624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:10,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136258857] [2021-07-09 18:03:10,017 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:10,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:10,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:10,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136258857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:10,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:10,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:10,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026466282] [2021-07-09 18:03:10,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:10,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:10,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:10,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:10,282 INFO L87 Difference]: Start difference. First operand 389 states and 914 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:11,707 INFO L93 Difference]: Finished difference Result 665 states and 1367 transitions. [2021-07-09 18:03:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:03:11,708 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:11,709 INFO L225 Difference]: With dead ends: 665 [2021-07-09 18:03:11,709 INFO L226 Difference]: Without dead ends: 641 [2021-07-09 18:03:11,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1291.8ms TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:03:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-07-09 18:03:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 390. [2021-07-09 18:03:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3573264781491003) internal successors, (917), 389 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 917 transitions. [2021-07-09 18:03:11,716 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 917 transitions. Word has length 27 [2021-07-09 18:03:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:11,716 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 917 transitions. [2021-07-09 18:03:11,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 917 transitions. [2021-07-09 18:03:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:11,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:11,716 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:11,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:03:11,917 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash 266427869, now seen corresponding path program 47 times [2021-07-09 18:03:11,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:11,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932903622] [2021-07-09 18:03:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:12,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:12,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932903622] [2021-07-09 18:03:12,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932903622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:12,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048457063] [2021-07-09 18:03:12,104 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:12,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:03:12,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:12,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:03:12,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:12,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048457063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:12,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:12,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:12,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539866015] [2021-07-09 18:03:12,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:12,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:12,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:12,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:12,495 INFO L87 Difference]: Start difference. First operand 390 states and 917 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:14,597 INFO L93 Difference]: Finished difference Result 729 states and 1539 transitions. [2021-07-09 18:03:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:03:14,597 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:14,599 INFO L225 Difference]: With dead ends: 729 [2021-07-09 18:03:14,599 INFO L226 Difference]: Without dead ends: 699 [2021-07-09 18:03:14,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1976.6ms TimeCoverageRelationStatistics Valid=949, Invalid=5857, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:03:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-07-09 18:03:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 414. [2021-07-09 18:03:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.358353510895884) internal successors, (974), 413 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 974 transitions. [2021-07-09 18:03:14,607 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 974 transitions. Word has length 27 [2021-07-09 18:03:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:14,607 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 974 transitions. [2021-07-09 18:03:14,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 974 transitions. [2021-07-09 18:03:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:14,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:14,608 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:14,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:14,812 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash 209025461, now seen corresponding path program 48 times [2021-07-09 18:03:14,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:14,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72392413] [2021-07-09 18:03:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:14,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:14,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72392413] [2021-07-09 18:03:14,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72392413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:14,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045179590] [2021-07-09 18:03:14,964 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:14,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:03:14,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:14,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:15,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045179590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:15,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:15,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:15,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677337160] [2021-07-09 18:03:15,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:15,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:15,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:15,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:15,241 INFO L87 Difference]: Start difference. First operand 414 states and 974 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:17,189 INFO L93 Difference]: Finished difference Result 787 states and 1650 transitions. [2021-07-09 18:03:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:03:17,189 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:17,191 INFO L225 Difference]: With dead ends: 787 [2021-07-09 18:03:17,191 INFO L226 Difference]: Without dead ends: 742 [2021-07-09 18:03:17,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 1816.7ms TimeCoverageRelationStatistics Valid=917, Invalid=5563, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:03:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-09 18:03:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 468. [2021-07-09 18:03:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.3618843683083512) internal successors, (1103), 467 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1103 transitions. [2021-07-09 18:03:17,199 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1103 transitions. Word has length 27 [2021-07-09 18:03:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:17,199 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1103 transitions. [2021-07-09 18:03:17,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1103 transitions. [2021-07-09 18:03:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:17,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:17,200 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:17,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:03:17,411 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:17,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1055902399, now seen corresponding path program 49 times [2021-07-09 18:03:17,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:17,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932000638] [2021-07-09 18:03:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:17,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:17,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932000638] [2021-07-09 18:03:17,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932000638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:17,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306048347] [2021-07-09 18:03:17,569 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:03:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:17,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:17,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306048347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:17,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:17,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:17,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379992527] [2021-07-09 18:03:17,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:17,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:17,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:17,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:17,866 INFO L87 Difference]: Start difference. First operand 468 states and 1103 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:19,135 INFO L93 Difference]: Finished difference Result 716 states and 1520 transitions. [2021-07-09 18:03:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:03:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:19,137 INFO L225 Difference]: With dead ends: 716 [2021-07-09 18:03:19,137 INFO L226 Difference]: Without dead ends: 689 [2021-07-09 18:03:19,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1210.5ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:03:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-07-09 18:03:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 461. [2021-07-09 18:03:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.3304347826086955) internal successors, (1072), 460 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1072 transitions. [2021-07-09 18:03:19,145 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1072 transitions. Word has length 27 [2021-07-09 18:03:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:19,145 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1072 transitions. [2021-07-09 18:03:19,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1072 transitions. [2021-07-09 18:03:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:19,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:19,146 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:19,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:03:19,350 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:19,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1174374461, now seen corresponding path program 50 times [2021-07-09 18:03:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:19,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952680123] [2021-07-09 18:03:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:19,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:19,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952680123] [2021-07-09 18:03:19,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952680123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:19,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584472936] [2021-07-09 18:03:19,526 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:19,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:19,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:19,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:19,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584472936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:19,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:19,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:19,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616238799] [2021-07-09 18:03:19,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:19,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:19,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:19,807 INFO L87 Difference]: Start difference. First operand 461 states and 1072 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:21,322 INFO L93 Difference]: Finished difference Result 711 states and 1531 transitions. [2021-07-09 18:03:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:03:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:21,324 INFO L225 Difference]: With dead ends: 711 [2021-07-09 18:03:21,324 INFO L226 Difference]: Without dead ends: 687 [2021-07-09 18:03:21,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1392.7ms TimeCoverageRelationStatistics Valid=712, Invalid=3710, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:03:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-07-09 18:03:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 484. [2021-07-09 18:03:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.3064182194616976) internal successors, (1114), 483 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1114 transitions. [2021-07-09 18:03:21,331 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1114 transitions. Word has length 27 [2021-07-09 18:03:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:21,332 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1114 transitions. [2021-07-09 18:03:21,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1114 transitions. [2021-07-09 18:03:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:21,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:21,333 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:21,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:03:21,544 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:21,545 INFO L82 PathProgramCache]: Analyzing trace with hash -52082337, now seen corresponding path program 51 times [2021-07-09 18:03:21,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:21,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934672597] [2021-07-09 18:03:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:21,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:21,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934672597] [2021-07-09 18:03:21,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934672597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:21,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20294834] [2021-07-09 18:03:21,659 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:21,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:03:21,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:21,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:21,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:21,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20294834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:21,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:21,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 18:03:21,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786046701] [2021-07-09 18:03:21,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:21,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:21,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:21,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:21,977 INFO L87 Difference]: Start difference. First operand 484 states and 1114 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:03:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:23,262 INFO L93 Difference]: Finished difference Result 697 states and 1499 transitions. [2021-07-09 18:03:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:03:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 27 [2021-07-09 18:03:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:23,264 INFO L225 Difference]: With dead ends: 697 [2021-07-09 18:03:23,265 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 18:03:23,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1215.1ms TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:03:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 18:03:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 448. [2021-07-09 18:03:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.250559284116331) internal successors, (1006), 447 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1006 transitions. [2021-07-09 18:03:23,273 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1006 transitions. Word has length 27 [2021-07-09 18:03:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:23,273 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1006 transitions. [2021-07-09 18:03:23,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:03:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1006 transitions. [2021-07-09 18:03:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:23,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:23,274 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:23,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:03:23,475 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:23,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2112942139, now seen corresponding path program 52 times [2021-07-09 18:03:23,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:23,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134602706] [2021-07-09 18:03:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:23,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134602706] [2021-07-09 18:03:23,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134602706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730353918] [2021-07-09 18:03:23,605 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:23,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:23,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:23,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:23,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730353918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:23,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:23,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 18:03:23,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509652746] [2021-07-09 18:03:23,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:23,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:23,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:23,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:23,907 INFO L87 Difference]: Start difference. First operand 448 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:03:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:24,764 INFO L93 Difference]: Finished difference Result 644 states and 1380 transitions. [2021-07-09 18:03:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:03:24,764 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 27 [2021-07-09 18:03:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:24,766 INFO L225 Difference]: With dead ends: 644 [2021-07-09 18:03:24,766 INFO L226 Difference]: Without dead ends: 630 [2021-07-09 18:03:24,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 853.9ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:03:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-07-09 18:03:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 493. [2021-07-09 18:03:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.252032520325203) internal successors, (1108), 492 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1108 transitions. [2021-07-09 18:03:24,774 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1108 transitions. Word has length 27 [2021-07-09 18:03:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:24,774 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1108 transitions. [2021-07-09 18:03:24,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:03:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1108 transitions. [2021-07-09 18:03:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:24,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:24,775 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:24,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:24,975 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:24,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1169332625, now seen corresponding path program 53 times [2021-07-09 18:03:24,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:24,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113665511] [2021-07-09 18:03:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:25,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:25,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113665511] [2021-07-09 18:03:25,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113665511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:25,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64488001] [2021-07-09 18:03:25,084 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:25,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:03:25,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:25,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:25,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:25,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64488001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:25,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:25,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 18:03:25,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991602489] [2021-07-09 18:03:25,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:25,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:25,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:25,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:25,350 INFO L87 Difference]: Start difference. First operand 493 states and 1108 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:03:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:26,309 INFO L93 Difference]: Finished difference Result 666 states and 1417 transitions. [2021-07-09 18:03:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:03:26,310 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 27 [2021-07-09 18:03:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:26,312 INFO L225 Difference]: With dead ends: 666 [2021-07-09 18:03:26,312 INFO L226 Difference]: Without dead ends: 627 [2021-07-09 18:03:26,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 917.6ms TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:03:26,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-09 18:03:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 451. [2021-07-09 18:03:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 2.2355555555555555) internal successors, (1006), 450 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1006 transitions. [2021-07-09 18:03:26,319 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1006 transitions. Word has length 27 [2021-07-09 18:03:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:26,319 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1006 transitions. [2021-07-09 18:03:26,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:03:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1006 transitions. [2021-07-09 18:03:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:26,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:26,320 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:26,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-09 18:03:26,521 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash 634102823, now seen corresponding path program 54 times [2021-07-09 18:03:26,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:26,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212260607] [2021-07-09 18:03:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:26,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:26,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212260607] [2021-07-09 18:03:26,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212260607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:26,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456518995] [2021-07-09 18:03:26,640 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:26,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:03:26,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:26,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:26,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:26,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456518995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:26,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:26,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-09 18:03:26,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710229996] [2021-07-09 18:03:26,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:03:26,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:26,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:03:26,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:03:26,972 INFO L87 Difference]: Start difference. First operand 451 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:03:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:27,636 INFO L93 Difference]: Finished difference Result 558 states and 1193 transitions. [2021-07-09 18:03:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:03:27,636 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 27 [2021-07-09 18:03:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:27,638 INFO L225 Difference]: With dead ends: 558 [2021-07-09 18:03:27,638 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 18:03:27,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 757.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:03:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 18:03:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 427. [2021-07-09 18:03:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.1338028169014085) internal successors, (909), 426 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 909 transitions. [2021-07-09 18:03:27,644 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 909 transitions. Word has length 27 [2021-07-09 18:03:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:27,645 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 909 transitions. [2021-07-09 18:03:27,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:03:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 909 transitions. [2021-07-09 18:03:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:27,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:27,645 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:27,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:27,849 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash 177512313, now seen corresponding path program 55 times [2021-07-09 18:03:27,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:27,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306222813] [2021-07-09 18:03:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:28,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:28,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306222813] [2021-07-09 18:03:28,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306222813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:28,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602640188] [2021-07-09 18:03:28,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:28,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:03:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:28,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602640188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:28,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:28,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:03:28,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270393228] [2021-07-09 18:03:28,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:28,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:28,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:28,270 INFO L87 Difference]: Start difference. First operand 427 states and 909 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:29,681 INFO L93 Difference]: Finished difference Result 575 states and 1167 transitions. [2021-07-09 18:03:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:03:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-07-09 18:03:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:29,683 INFO L225 Difference]: With dead ends: 575 [2021-07-09 18:03:29,683 INFO L226 Difference]: Without dead ends: 558 [2021-07-09 18:03:29,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1412.8ms TimeCoverageRelationStatistics Valid=739, Invalid=4091, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:03:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-09 18:03:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 341. [2021-07-09 18:03:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.126470588235294) internal successors, (723), 340 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 723 transitions. [2021-07-09 18:03:29,688 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 723 transitions. Word has length 27 [2021-07-09 18:03:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:29,688 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 723 transitions. [2021-07-09 18:03:29,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-07-09 18:03:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 723 transitions. [2021-07-09 18:03:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:03:29,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:29,688 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:29,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:29,893 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:29,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1680806143, now seen corresponding path program 56 times [2021-07-09 18:03:29,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:29,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308737601] [2021-07-09 18:03:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:03:29,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308737601] [2021-07-09 18:03:29,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308737601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123267934] [2021-07-09 18:03:29,935 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:29,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:29,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:03:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:03:30,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123267934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:30,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:30,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 18:03:30,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995535748] [2021-07-09 18:03:30,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:03:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:03:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:03:30,003 INFO L87 Difference]: Start difference. First operand 341 states and 723 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:30,052 INFO L93 Difference]: Finished difference Result 501 states and 1034 transitions. [2021-07-09 18:03:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:03:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:03:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:30,054 INFO L225 Difference]: With dead ends: 501 [2021-07-09 18:03:30,054 INFO L226 Difference]: Without dead ends: 468 [2021-07-09 18:03:30,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:03:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-07-09 18:03:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 314. [2021-07-09 18:03:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.121405750798722) internal successors, (664), 313 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 664 transitions. [2021-07-09 18:03:30,058 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 664 transitions. Word has length 27 [2021-07-09 18:03:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:30,058 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 664 transitions. [2021-07-09 18:03:30,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 664 transitions. [2021-07-09 18:03:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:30,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:30,058 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:30,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:30,262 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:30,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1310861107, now seen corresponding path program 57 times [2021-07-09 18:03:30,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:30,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957541433] [2021-07-09 18:03:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:30,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:30,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957541433] [2021-07-09 18:03:30,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957541433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:30,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060406530] [2021-07-09 18:03:30,415 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:30,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:03:30,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:30,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:30,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:30,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060406530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:30,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:30,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:03:30,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931590552] [2021-07-09 18:03:30,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:03:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:03:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:03:30,716 INFO L87 Difference]: Start difference. First operand 314 states and 664 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-07-09 18:03:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:31,855 INFO L93 Difference]: Finished difference Result 613 states and 1226 transitions. [2021-07-09 18:03:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:03:31,855 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-07-09 18:03:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:31,856 INFO L225 Difference]: With dead ends: 613 [2021-07-09 18:03:31,856 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 18:03:31,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1053.4ms TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:03:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 18:03:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 333. [2021-07-09 18:03:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.1204819277108435) internal successors, (704), 332 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 704 transitions. [2021-07-09 18:03:31,861 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 704 transitions. Word has length 29 [2021-07-09 18:03:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:31,861 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 704 transitions. [2021-07-09 18:03:31,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-07-09 18:03:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 704 transitions. [2021-07-09 18:03:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:31,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:31,862 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:32,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:32,064 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash 75290793, now seen corresponding path program 58 times [2021-07-09 18:03:32,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:32,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019463774] [2021-07-09 18:03:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:32,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:32,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019463774] [2021-07-09 18:03:32,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019463774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:32,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572405823] [2021-07-09 18:03:32,178 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:32,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:32,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:32,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:32,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:32,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572405823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:32,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:32,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-07-09 18:03:32,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799505501] [2021-07-09 18:03:32,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:32,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:32,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:32,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:32,491 INFO L87 Difference]: Start difference. First operand 333 states and 704 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-07-09 18:03:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:34,195 INFO L93 Difference]: Finished difference Result 809 states and 1602 transitions. [2021-07-09 18:03:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:03:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-07-09 18:03:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:34,197 INFO L225 Difference]: With dead ends: 809 [2021-07-09 18:03:34,197 INFO L226 Difference]: Without dead ends: 761 [2021-07-09 18:03:34,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1418.6ms TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:03:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-07-09 18:03:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 437. [2021-07-09 18:03:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.1376146788990824) internal successors, (932), 436 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 932 transitions. [2021-07-09 18:03:34,203 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 932 transitions. Word has length 29 [2021-07-09 18:03:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:34,203 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 932 transitions. [2021-07-09 18:03:34,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-07-09 18:03:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 932 transitions. [2021-07-09 18:03:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:34,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:34,204 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:34,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:03:34,405 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash -937401739, now seen corresponding path program 59 times [2021-07-09 18:03:34,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:34,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940701869] [2021-07-09 18:03:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:34,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:34,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940701869] [2021-07-09 18:03:34,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940701869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:34,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273354128] [2021-07-09 18:03:34,533 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:34,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:03:34,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:34,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:34,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273354128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:34,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:34,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-07-09 18:03:34,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595688684] [2021-07-09 18:03:34,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:34,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:34,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:34,887 INFO L87 Difference]: Start difference. First operand 437 states and 932 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-07-09 18:03:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:37,011 INFO L93 Difference]: Finished difference Result 994 states and 1975 transitions. [2021-07-09 18:03:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:03:37,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-07-09 18:03:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:37,013 INFO L225 Difference]: With dead ends: 994 [2021-07-09 18:03:37,013 INFO L226 Difference]: Without dead ends: 943 [2021-07-09 18:03:37,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 1900.0ms TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:03:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-09 18:03:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 420. [2021-07-09 18:03:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.1408114558472553) internal successors, (897), 419 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 897 transitions. [2021-07-09 18:03:37,019 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 897 transitions. Word has length 29 [2021-07-09 18:03:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:37,020 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 897 transitions. [2021-07-09 18:03:37,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-07-09 18:03:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 897 transitions. [2021-07-09 18:03:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:37,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:37,020 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:37,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:37,233 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1615340429, now seen corresponding path program 60 times [2021-07-09 18:03:37,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:37,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306528051] [2021-07-09 18:03:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:37,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:37,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306528051] [2021-07-09 18:03:37,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306528051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:37,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396409369] [2021-07-09 18:03:37,375 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:37,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:03:37,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:37,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:37,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396409369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:37,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:37,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:03:37,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745762675] [2021-07-09 18:03:37,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:03:37,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:37,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:03:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:03:37,688 INFO L87 Difference]: Start difference. First operand 420 states and 897 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-07-09 18:03:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:38,867 INFO L93 Difference]: Finished difference Result 665 states and 1331 transitions. [2021-07-09 18:03:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:03:38,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-07-09 18:03:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:38,869 INFO L225 Difference]: With dead ends: 665 [2021-07-09 18:03:38,869 INFO L226 Difference]: Without dead ends: 618 [2021-07-09 18:03:38,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1063.6ms TimeCoverageRelationStatistics Valid=543, Invalid=3489, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:03:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-07-09 18:03:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 459. [2021-07-09 18:03:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.1397379912663754) internal successors, (980), 458 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 980 transitions. [2021-07-09 18:03:38,874 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 980 transitions. Word has length 29 [2021-07-09 18:03:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:38,875 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 980 transitions. [2021-07-09 18:03:38,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-07-09 18:03:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 980 transitions. [2021-07-09 18:03:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:38,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:38,875 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:39,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:03:39,076 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:39,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1666934335, now seen corresponding path program 61 times [2021-07-09 18:03:39,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:39,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042510964] [2021-07-09 18:03:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:39,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:39,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042510964] [2021-07-09 18:03:39,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042510964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:39,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615642243] [2021-07-09 18:03:39,212 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:39,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:39,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:39,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615642243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:39,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:39,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-07-09 18:03:39,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299053792] [2021-07-09 18:03:39,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:03:39,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:39,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:03:39,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:03:39,504 INFO L87 Difference]: Start difference. First operand 459 states and 980 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-07-09 18:03:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:41,210 INFO L93 Difference]: Finished difference Result 740 states and 1463 transitions. [2021-07-09 18:03:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:03:41,210 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-07-09 18:03:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:41,211 INFO L225 Difference]: With dead ends: 740 [2021-07-09 18:03:41,211 INFO L226 Difference]: Without dead ends: 683 [2021-07-09 18:03:41,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 1434.4ms TimeCoverageRelationStatistics Valid=756, Invalid=5886, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:03:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-09 18:03:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 376. [2021-07-09 18:03:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.1413333333333333) internal successors, (803), 375 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 803 transitions. [2021-07-09 18:03:41,217 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 803 transitions. Word has length 29 [2021-07-09 18:03:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:41,217 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 803 transitions. [2021-07-09 18:03:41,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-07-09 18:03:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 803 transitions. [2021-07-09 18:03:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:41,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:41,218 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:41,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:41,418 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash -303996619, now seen corresponding path program 62 times [2021-07-09 18:03:41,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:41,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922178638] [2021-07-09 18:03:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:41,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:41,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922178638] [2021-07-09 18:03:41,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922178638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:41,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693240216] [2021-07-09 18:03:41,623 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:41,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:41,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:41,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:41,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:41,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693240216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:41,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:41,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-09 18:03:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62682550] [2021-07-09 18:03:41,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:03:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:41,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:03:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:03:41,996 INFO L87 Difference]: Start difference. First operand 376 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-07-09 18:03:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:45,767 INFO L93 Difference]: Finished difference Result 945 states and 1899 transitions. [2021-07-09 18:03:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:03:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 29 [2021-07-09 18:03:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:45,769 INFO L225 Difference]: With dead ends: 945 [2021-07-09 18:03:45,769 INFO L226 Difference]: Without dead ends: 901 [2021-07-09 18:03:45,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3517.3ms TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:03:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-07-09 18:03:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 438. [2021-07-09 18:03:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.1556064073226544) internal successors, (942), 437 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 942 transitions. [2021-07-09 18:03:45,780 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 942 transitions. Word has length 29 [2021-07-09 18:03:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:45,780 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 942 transitions. [2021-07-09 18:03:45,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-07-09 18:03:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 942 transitions. [2021-07-09 18:03:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:45,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:45,781 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:45,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:45,985 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:45,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:45,985 INFO L82 PathProgramCache]: Analyzing trace with hash 649114413, now seen corresponding path program 63 times [2021-07-09 18:03:45,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:45,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117158849] [2021-07-09 18:03:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:46,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:46,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117158849] [2021-07-09 18:03:46,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117158849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:46,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768901675] [2021-07-09 18:03:46,224 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:46,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:03:46,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:46,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:03:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:46,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768901675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:46,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:46,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-07-09 18:03:46,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995484470] [2021-07-09 18:03:46,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:03:46,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:03:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:03:46,585 INFO L87 Difference]: Start difference. First operand 438 states and 942 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-07-09 18:03:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:47,643 INFO L93 Difference]: Finished difference Result 599 states and 1229 transitions. [2021-07-09 18:03:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:03:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-07-09 18:03:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:47,645 INFO L225 Difference]: With dead ends: 599 [2021-07-09 18:03:47,645 INFO L226 Difference]: Without dead ends: 567 [2021-07-09 18:03:47,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1124.8ms TimeCoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:03:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-09 18:03:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 431. [2021-07-09 18:03:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.1372093023255814) internal successors, (919), 430 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 919 transitions. [2021-07-09 18:03:47,650 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 919 transitions. Word has length 29 [2021-07-09 18:03:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:47,650 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 919 transitions. [2021-07-09 18:03:47,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-07-09 18:03:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 919 transitions. [2021-07-09 18:03:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:47,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:47,651 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:47,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:47,873 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1614463413, now seen corresponding path program 64 times [2021-07-09 18:03:47,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:47,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682317813] [2021-07-09 18:03:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:48,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:48,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682317813] [2021-07-09 18:03:48,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682317813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:48,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639667501] [2021-07-09 18:03:48,129 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:48,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:48,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:48,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:03:48,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:48,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639667501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:48,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:48,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:03:48,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561544303] [2021-07-09 18:03:48,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:03:48,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:48,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:03:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:03:48,539 INFO L87 Difference]: Start difference. First operand 431 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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) [2021-07-09 18:03:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:49,932 INFO L93 Difference]: Finished difference Result 661 states and 1333 transitions. [2021-07-09 18:03:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:03:49,932 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 29 [2021-07-09 18:03:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:49,933 INFO L225 Difference]: With dead ends: 661 [2021-07-09 18:03:49,934 INFO L226 Difference]: Without dead ends: 624 [2021-07-09 18:03:49,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1519.9ms TimeCoverageRelationStatistics Valid=535, Invalid=3755, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:03:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-09 18:03:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 362. [2021-07-09 18:03:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-07-09 18:03:49,938 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 29 [2021-07-09 18:03:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:49,938 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-07-09 18:03:49,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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) [2021-07-09 18:03:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-07-09 18:03:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:03:49,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:49,940 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:50,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:50,157 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -184540877, now seen corresponding path program 65 times [2021-07-09 18:03:50,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:50,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348219541] [2021-07-09 18:03:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:50,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:50,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348219541] [2021-07-09 18:03:50,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348219541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:50,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438304049] [2021-07-09 18:03:50,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:50,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:03:50,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:50,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:03:50,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:50,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438304049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:50,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:50,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:03:50,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612538436] [2021-07-09 18:03:50,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:03:50,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:50,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:03:50,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:03:50,589 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-07-09 18:03:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:51,956 INFO L93 Difference]: Finished difference Result 586 states and 1201 transitions. [2021-07-09 18:03:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:03:51,956 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-07-09 18:03:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:51,957 INFO L225 Difference]: With dead ends: 586 [2021-07-09 18:03:51,957 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 18:03:51,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1286.3ms TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:03:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 18:03:51,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 194. [2021-07-09 18:03:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.051813471502591) internal successors, (396), 193 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 396 transitions. [2021-07-09 18:03:51,962 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 396 transitions. Word has length 29 [2021-07-09 18:03:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:51,962 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 396 transitions. [2021-07-09 18:03:51,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-07-09 18:03:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 396 transitions. [2021-07-09 18:03:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:03:51,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:51,962 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:52,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 18:03:52,163 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:52,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:52,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 66 times [2021-07-09 18:03:52,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:52,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614746432] [2021-07-09 18:03:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:52,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:52,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614746432] [2021-07-09 18:03:52,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614746432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:52,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879104161] [2021-07-09 18:03:52,402 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:52,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:03:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:52,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:03:52,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:52,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879104161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:52,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:52,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:03:52,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940272855] [2021-07-09 18:03:52,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:03:52,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:52,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:03:52,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:03:52,840 INFO L87 Difference]: Start difference. First operand 194 states and 396 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:54,314 INFO L93 Difference]: Finished difference Result 469 states and 906 transitions. [2021-07-09 18:03:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:03:54,314 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:03:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:54,315 INFO L225 Difference]: With dead ends: 469 [2021-07-09 18:03:54,315 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 18:03:54,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1585.7ms TimeCoverageRelationStatistics Valid=731, Invalid=4969, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:03:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 18:03:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 248. [2021-07-09 18:03:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.1214574898785425) internal successors, (524), 247 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) [2021-07-09 18:03:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 524 transitions. [2021-07-09 18:03:54,320 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 524 transitions. Word has length 31 [2021-07-09 18:03:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:54,320 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 524 transitions. [2021-07-09 18:03:54,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 524 transitions. [2021-07-09 18:03:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:03:54,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:54,320 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:54,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 18:03:54,521 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:54,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1037382439, now seen corresponding path program 67 times [2021-07-09 18:03:54,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:54,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289693585] [2021-07-09 18:03:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:54,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:54,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289693585] [2021-07-09 18:03:54,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289693585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:54,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441925022] [2021-07-09 18:03:54,735 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:54,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:54,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:55,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441925022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:55,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:55,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:03:55,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660956096] [2021-07-09 18:03:55,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:03:55,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:55,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:03:55,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:03:55,052 INFO L87 Difference]: Start difference. First operand 248 states and 524 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:56,577 INFO L93 Difference]: Finished difference Result 489 states and 939 transitions. [2021-07-09 18:03:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:03:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:03:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:56,577 INFO L225 Difference]: With dead ends: 489 [2021-07-09 18:03:56,578 INFO L226 Difference]: Without dead ends: 445 [2021-07-09 18:03:56,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1498.3ms TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:03:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-09 18:03:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 250. [2021-07-09 18:03:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.1204819277108435) internal successors, (528), 249 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 528 transitions. [2021-07-09 18:03:56,581 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 528 transitions. Word has length 31 [2021-07-09 18:03:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:56,581 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 528 transitions. [2021-07-09 18:03:56,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 528 transitions. [2021-07-09 18:03:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:03:56,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:56,582 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:56,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:56,782 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2133425259, now seen corresponding path program 68 times [2021-07-09 18:03:56,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:56,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701795663] [2021-07-09 18:03:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:56,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:56,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701795663] [2021-07-09 18:03:56,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701795663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:56,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406108308] [2021-07-09 18:03:56,988 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:57,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:57,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:57,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:57,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406108308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:57,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:57,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:03:57,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51890924] [2021-07-09 18:03:57,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:03:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:03:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:03:57,312 INFO L87 Difference]: Start difference. First operand 250 states and 528 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:58,948 INFO L93 Difference]: Finished difference Result 487 states and 937 transitions. [2021-07-09 18:03:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:03:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:03:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:58,949 INFO L225 Difference]: With dead ends: 487 [2021-07-09 18:03:58,949 INFO L226 Difference]: Without dead ends: 449 [2021-07-09 18:03:58,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1607.7ms TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:03:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-09 18:03:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 252. [2021-07-09 18:03:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.1195219123505975) internal successors, (532), 251 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) [2021-07-09 18:03:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 532 transitions. [2021-07-09 18:03:58,953 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 532 transitions. Word has length 31 [2021-07-09 18:03:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:58,953 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 532 transitions. [2021-07-09 18:03:58,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 532 transitions. [2021-07-09 18:03:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:03:58,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:58,954 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:59,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:59,177 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1329117521, now seen corresponding path program 69 times [2021-07-09 18:03:59,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:59,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567126328] [2021-07-09 18:03:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:59,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:59,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567126328] [2021-07-09 18:03:59,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567126328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:59,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344351005] [2021-07-09 18:03:59,451 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:59,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:03:59,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:59,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:03:59,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:59,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344351005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:59,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:59,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:03:59,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204391374] [2021-07-09 18:03:59,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:03:59,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:59,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:03:59,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:03:59,852 INFO L87 Difference]: Start difference. First operand 252 states and 532 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:01,846 INFO L93 Difference]: Finished difference Result 532 states and 1020 transitions. [2021-07-09 18:04:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:04:01,846 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:04:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:01,847 INFO L225 Difference]: With dead ends: 532 [2021-07-09 18:04:01,847 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 18:04:01,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 1984.0ms TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:04:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 18:04:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 255. [2021-07-09 18:04:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-07-09 18:04:01,855 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-07-09 18:04:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:01,855 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-07-09 18:04:01,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-07-09 18:04:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:04:01,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:01,856 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:02,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:02,056 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1700921915, now seen corresponding path program 70 times [2021-07-09 18:04:02,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:02,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877705783] [2021-07-09 18:04:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:02,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:02,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877705783] [2021-07-09 18:04:02,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877705783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:02,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18969565] [2021-07-09 18:04:02,292 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:02,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:02,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:02,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:02,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:02,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18969565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:02,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:02,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:04:02,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632961667] [2021-07-09 18:04:02,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:04:02,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:02,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:04:02,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:04:02,659 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:04,469 INFO L93 Difference]: Finished difference Result 465 states and 897 transitions. [2021-07-09 18:04:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:04:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:04:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:04,470 INFO L225 Difference]: With dead ends: 465 [2021-07-09 18:04:04,470 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 18:04:04,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 1731.7ms TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:04:04,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 18:04:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 255. [2021-07-09 18:04:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-07-09 18:04:04,473 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-07-09 18:04:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:04,474 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-07-09 18:04:04,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-07-09 18:04:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:04:04,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:04,474 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:04,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 18:04:04,675 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:04,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1287765489, now seen corresponding path program 71 times [2021-07-09 18:04:04,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:04,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841925671] [2021-07-09 18:04:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:04,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:04,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841925671] [2021-07-09 18:04:04,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841925671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:04,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665465121] [2021-07-09 18:04:04,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:04,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:04:04,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:04,947 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:05,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665465121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:05,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:05,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:04:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517884376] [2021-07-09 18:04:05,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:04:05,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:04:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:04:05,269 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:06,834 INFO L93 Difference]: Finished difference Result 465 states and 901 transitions. [2021-07-09 18:04:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:04:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:04:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:06,835 INFO L225 Difference]: With dead ends: 465 [2021-07-09 18:04:06,835 INFO L226 Difference]: Without dead ends: 427 [2021-07-09 18:04:06,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1553.8ms TimeCoverageRelationStatistics Valid=752, Invalid=5568, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:04:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-09 18:04:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 265. [2021-07-09 18:04:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.121212121212121) internal successors, (560), 264 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 560 transitions. [2021-07-09 18:04:06,839 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 560 transitions. Word has length 31 [2021-07-09 18:04:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:06,839 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 560 transitions. [2021-07-09 18:04:06,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 560 transitions. [2021-07-09 18:04:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:04:06,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:06,840 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:07,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:07,045 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:07,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2120190005, now seen corresponding path program 72 times [2021-07-09 18:04:07,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:07,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671626155] [2021-07-09 18:04:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:07,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671626155] [2021-07-09 18:04:07,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671626155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912423404] [2021-07-09 18:04:07,287 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:07,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:04:07,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:07,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:07,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912423404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:07,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:07,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:04:07,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813126587] [2021-07-09 18:04:07,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:04:07,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:07,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:04:07,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:04:07,626 INFO L87 Difference]: Start difference. First operand 265 states and 560 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:09,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:09,315 INFO L93 Difference]: Finished difference Result 518 states and 999 transitions. [2021-07-09 18:04:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:04:09,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:04:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:09,316 INFO L225 Difference]: With dead ends: 518 [2021-07-09 18:04:09,316 INFO L226 Difference]: Without dead ends: 473 [2021-07-09 18:04:09,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 1721.0ms TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:04:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-09 18:04:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 267. [2021-07-09 18:04:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1240601503759398) internal successors, (565), 266 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 565 transitions. [2021-07-09 18:04:09,321 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 565 transitions. Word has length 31 [2021-07-09 18:04:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:09,321 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 565 transitions. [2021-07-09 18:04:09,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 565 transitions. [2021-07-09 18:04:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:04:09,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:09,321 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:09,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:09,533 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:09,533 INFO L82 PathProgramCache]: Analyzing trace with hash 855262145, now seen corresponding path program 73 times [2021-07-09 18:04:09,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:09,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792266119] [2021-07-09 18:04:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:09,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:09,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792266119] [2021-07-09 18:04:09,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792266119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:09,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303916914] [2021-07-09 18:04:09,795 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:09,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:10,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303916914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:10,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:10,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:04:10,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751801469] [2021-07-09 18:04:10,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:04:10,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:10,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:04:10,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:04:10,130 INFO L87 Difference]: Start difference. First operand 267 states and 565 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:11,749 INFO L93 Difference]: Finished difference Result 448 states and 878 transitions. [2021-07-09 18:04:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:04:11,749 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:04:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:11,750 INFO L225 Difference]: With dead ends: 448 [2021-07-09 18:04:11,750 INFO L226 Difference]: Without dead ends: 428 [2021-07-09 18:04:11,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1663.9ms TimeCoverageRelationStatistics Valid=808, Invalid=5044, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:04:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-09 18:04:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 263. [2021-07-09 18:04:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.1068702290076335) internal successors, (552), 262 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 552 transitions. [2021-07-09 18:04:11,754 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 552 transitions. Word has length 31 [2021-07-09 18:04:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:11,754 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 552 transitions. [2021-07-09 18:04:11,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 552 transitions. [2021-07-09 18:04:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:04:11,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:11,754 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:11,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:11,955 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:11,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:11,955 INFO L82 PathProgramCache]: Analyzing trace with hash 389420273, now seen corresponding path program 74 times [2021-07-09 18:04:11,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:11,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074151401] [2021-07-09 18:04:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:12,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:12,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074151401] [2021-07-09 18:04:12,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074151401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:12,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143894419] [2021-07-09 18:04:12,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:12,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:12,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:12,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:12,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:12,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143894419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:12,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:12,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:04:12,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818657863] [2021-07-09 18:04:12,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:04:12,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:12,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:04:12,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:04:12,441 INFO L87 Difference]: Start difference. First operand 263 states and 552 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:14,513 INFO L93 Difference]: Finished difference Result 529 states and 1039 transitions. [2021-07-09 18:04:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:04:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:04:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:14,514 INFO L225 Difference]: With dead ends: 529 [2021-07-09 18:04:14,514 INFO L226 Difference]: Without dead ends: 481 [2021-07-09 18:04:14,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 1901.8ms TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:04:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-09 18:04:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 276. [2021-07-09 18:04:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1163636363636362) internal successors, (582), 275 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 582 transitions. [2021-07-09 18:04:14,517 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 582 transitions. Word has length 31 [2021-07-09 18:04:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:14,518 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 582 transitions. [2021-07-09 18:04:14,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 582 transitions. [2021-07-09 18:04:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:04:14,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:14,518 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:14,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-09 18:04:14,719 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:14,719 INFO L82 PathProgramCache]: Analyzing trace with hash -875507587, now seen corresponding path program 75 times [2021-07-09 18:04:14,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:14,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909113372] [2021-07-09 18:04:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:14,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909113372] [2021-07-09 18:04:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909113372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722002453] [2021-07-09 18:04:14,929 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:14,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:04:14,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:14,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:04:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:15,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722002453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:15,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:15,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:04:15,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460795874] [2021-07-09 18:04:15,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:04:15,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:15,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:04:15,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:04:15,270 INFO L87 Difference]: Start difference. First operand 276 states and 582 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:17,125 INFO L93 Difference]: Finished difference Result 518 states and 1018 transitions. [2021-07-09 18:04:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:04:17,125 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-09 18:04:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:17,126 INFO L225 Difference]: With dead ends: 518 [2021-07-09 18:04:17,126 INFO L226 Difference]: Without dead ends: 484 [2021-07-09 18:04:17,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1791.8ms TimeCoverageRelationStatistics Valid=909, Invalid=6063, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:04:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-09 18:04:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 273. [2021-07-09 18:04:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.099264705882353) internal successors, (571), 272 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 571 transitions. [2021-07-09 18:04:17,131 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 571 transitions. Word has length 31 [2021-07-09 18:04:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:17,131 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 571 transitions. [2021-07-09 18:04:17,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 571 transitions. [2021-07-09 18:04:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:04:17,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:17,132 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:17,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:17,345 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1413332923, now seen corresponding path program 76 times [2021-07-09 18:04:17,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:17,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792658022] [2021-07-09 18:04:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:17,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:17,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792658022] [2021-07-09 18:04:17,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792658022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:17,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121523526] [2021-07-09 18:04:17,552 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:17,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:17,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:17,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:04:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:18,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121523526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:18,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:18,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-07-09 18:04:18,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411420847] [2021-07-09 18:04:18,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:04:18,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:04:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:04:18,047 INFO L87 Difference]: Start difference. First operand 273 states and 571 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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) [2021-07-09 18:04:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:20,148 INFO L93 Difference]: Finished difference Result 473 states and 960 transitions. [2021-07-09 18:04:20,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:04:20,149 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 31 [2021-07-09 18:04:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:20,149 INFO L225 Difference]: With dead ends: 473 [2021-07-09 18:04:20,149 INFO L226 Difference]: Without dead ends: 447 [2021-07-09 18:04:20,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 2079.5ms TimeCoverageRelationStatistics Valid=655, Invalid=4315, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:04:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-09 18:04:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 303. [2021-07-09 18:04:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.096026490066225) internal successors, (633), 302 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 633 transitions. [2021-07-09 18:04:20,155 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 633 transitions. Word has length 31 [2021-07-09 18:04:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:20,155 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 633 transitions. [2021-07-09 18:04:20,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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) [2021-07-09 18:04:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 633 transitions. [2021-07-09 18:04:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:20,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:20,156 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:20,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 18:04:20,369 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:20,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1311105745, now seen corresponding path program 77 times [2021-07-09 18:04:20,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:20,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617798981] [2021-07-09 18:04:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:04:20,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:20,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617798981] [2021-07-09 18:04:20,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617798981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:20,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87751545] [2021-07-09 18:04:20,413 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:20,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:04:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:04:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:04:20,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87751545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:20,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:20,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 18:04:20,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537885530] [2021-07-09 18:04:20,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:04:20,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:04:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:04:20,485 INFO L87 Difference]: Start difference. First operand 303 states and 633 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:20,557 INFO L93 Difference]: Finished difference Result 483 states and 979 transitions. [2021-07-09 18:04:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:04:20,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:04:20,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:20,558 INFO L225 Difference]: With dead ends: 483 [2021-07-09 18:04:20,558 INFO L226 Difference]: Without dead ends: 444 [2021-07-09 18:04:20,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:04:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-09 18:04:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 310. [2021-07-09 18:04:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.0938511326860842) internal successors, (647), 309 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 647 transitions. [2021-07-09 18:04:20,563 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 647 transitions. Word has length 33 [2021-07-09 18:04:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:20,563 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 647 transitions. [2021-07-09 18:04:20,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 647 transitions. [2021-07-09 18:04:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:20,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:20,564 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:20,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:04:20,777 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1845552953, now seen corresponding path program 78 times [2021-07-09 18:04:20,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:20,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567503701] [2021-07-09 18:04:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:21,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:21,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567503701] [2021-07-09 18:04:21,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567503701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:21,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441122100] [2021-07-09 18:04:21,018 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:21,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:04:21,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:21,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:04:21,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:21,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441122100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:21,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:21,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-07-09 18:04:21,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062368900] [2021-07-09 18:04:21,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:04:21,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:04:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:04:21,450 INFO L87 Difference]: Start difference. First operand 310 states and 647 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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) [2021-07-09 18:04:26,129 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-09 18:04:26,362 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-07-09 18:04:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:28,285 INFO L93 Difference]: Finished difference Result 1038 states and 2060 transitions. [2021-07-09 18:04:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-09 18:04:28,286 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 33 [2021-07-09 18:04:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:28,287 INFO L225 Difference]: With dead ends: 1038 [2021-07-09 18:04:28,287 INFO L226 Difference]: Without dead ends: 976 [2021-07-09 18:04:28,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 6093.4ms TimeCoverageRelationStatistics Valid=2584, Invalid=18008, Unknown=0, NotChecked=0, Total=20592 [2021-07-09 18:04:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-07-09 18:04:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 386. [2021-07-09 18:04:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.109090909090909) internal successors, (812), 385 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 812 transitions. [2021-07-09 18:04:28,295 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 812 transitions. Word has length 33 [2021-07-09 18:04:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:28,295 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 812 transitions. [2021-07-09 18:04:28,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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) [2021-07-09 18:04:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 812 transitions. [2021-07-09 18:04:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:04:28,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:28,296 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:28,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:04:28,501 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash -360118039, now seen corresponding path program 79 times [2021-07-09 18:04:28,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:28,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562739549] [2021-07-09 18:04:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:04:28,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:28,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562739549] [2021-07-09 18:04:28,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562739549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:28,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450720483] [2021-07-09 18:04:28,718 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:28,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:04:28,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:29,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450720483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:29,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:29,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:04:29,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686075817] [2021-07-09 18:04:29,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:04:29,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:04:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:04:29,141 INFO L87 Difference]: Start difference. First operand 386 states and 812 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:30,354 INFO L93 Difference]: Finished difference Result 583 states and 1174 transitions. [2021-07-09 18:04:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:04:30,358 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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 33 [2021-07-09 18:04:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:30,358 INFO L225 Difference]: With dead ends: 583 [2021-07-09 18:04:30,359 INFO L226 Difference]: Without dead ends: 538 [2021-07-09 18:04:30,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1266.3ms TimeCoverageRelationStatistics Valid=418, Invalid=4004, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:04:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-09 18:04:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 349. [2021-07-09 18:04:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.103448275862069) internal successors, (732), 348 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 732 transitions. [2021-07-09 18:04:30,362 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 732 transitions. Word has length 33 [2021-07-09 18:04:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:30,363 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 732 transitions. [2021-07-09 18:04:30,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 732 transitions. [2021-07-09 18:04:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:30,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:30,363 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:30,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:30,564 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 80 times [2021-07-09 18:04:30,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:30,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986615025] [2021-07-09 18:04:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:30,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:30,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986615025] [2021-07-09 18:04:30,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986615025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:30,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336510890] [2021-07-09 18:04:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:30,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:31,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336510890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:31,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:31,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:31,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309296019] [2021-07-09 18:04:31,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:31,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:31,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:31,270 INFO L87 Difference]: Start difference. First operand 349 states and 732 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:32,994 INFO L93 Difference]: Finished difference Result 782 states and 1584 transitions. [2021-07-09 18:04:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:04:32,995 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:32,996 INFO L225 Difference]: With dead ends: 782 [2021-07-09 18:04:32,996 INFO L226 Difference]: Without dead ends: 721 [2021-07-09 18:04:32,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1772.1ms TimeCoverageRelationStatistics Valid=913, Invalid=6227, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:04:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-09 18:04:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 461. [2021-07-09 18:04:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.1869565217391305) internal successors, (1006), 460 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1006 transitions. [2021-07-09 18:04:33,005 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1006 transitions. Word has length 35 [2021-07-09 18:04:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:33,005 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1006 transitions. [2021-07-09 18:04:33,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1006 transitions. [2021-07-09 18:04:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:33,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:33,006 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:33,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:33,229 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1678953501, now seen corresponding path program 81 times [2021-07-09 18:04:33,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:33,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558570353] [2021-07-09 18:04:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:33,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:33,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558570353] [2021-07-09 18:04:33,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558570353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:33,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062215109] [2021-07-09 18:04:33,471 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:33,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:04:33,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:33,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:33,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062215109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:33,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:33,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:33,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512855844] [2021-07-09 18:04:33,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:33,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:33,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:33,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:33,850 INFO L87 Difference]: Start difference. First operand 461 states and 1006 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:35,626 INFO L93 Difference]: Finished difference Result 808 states and 1627 transitions. [2021-07-09 18:04:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:04:35,627 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:35,628 INFO L225 Difference]: With dead ends: 808 [2021-07-09 18:04:35,628 INFO L226 Difference]: Without dead ends: 758 [2021-07-09 18:04:35,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 1770.7ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:04:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-07-09 18:04:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 463. [2021-07-09 18:04:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.186147186147186) internal successors, (1010), 462 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1010 transitions. [2021-07-09 18:04:35,634 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1010 transitions. Word has length 35 [2021-07-09 18:04:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:35,634 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1010 transitions. [2021-07-09 18:04:35,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1010 transitions. [2021-07-09 18:04:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:35,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:35,635 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:35,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:35,835 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash -648791001, now seen corresponding path program 82 times [2021-07-09 18:04:35,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:35,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025977485] [2021-07-09 18:04:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:36,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:36,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025977485] [2021-07-09 18:04:36,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025977485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:36,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345289086] [2021-07-09 18:04:36,064 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:36,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:36,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:36,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:36,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345289086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:36,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:36,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:36,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657014532] [2021-07-09 18:04:36,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:36,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:36,439 INFO L87 Difference]: Start difference. First operand 463 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:38,501 INFO L93 Difference]: Finished difference Result 806 states and 1625 transitions. [2021-07-09 18:04:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:04:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:38,502 INFO L225 Difference]: With dead ends: 806 [2021-07-09 18:04:38,502 INFO L226 Difference]: Without dead ends: 762 [2021-07-09 18:04:38,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 1870.3ms TimeCoverageRelationStatistics Valid=1094, Invalid=7836, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 18:04:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-09 18:04:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 465. [2021-07-09 18:04:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.185344827586207) internal successors, (1014), 464 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) [2021-07-09 18:04:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1014 transitions. [2021-07-09 18:04:38,508 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1014 transitions. Word has length 35 [2021-07-09 18:04:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:38,508 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1014 transitions. [2021-07-09 18:04:38,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1014 transitions. [2021-07-09 18:04:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:38,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:38,509 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:38,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:38,710 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:38,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash 447251819, now seen corresponding path program 83 times [2021-07-09 18:04:38,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:38,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983160940] [2021-07-09 18:04:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:38,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:38,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983160940] [2021-07-09 18:04:38,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983160940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:38,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872022302] [2021-07-09 18:04:38,985 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:39,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:04:39,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:39,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872022302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:39,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:39,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:39,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63879590] [2021-07-09 18:04:39,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:39,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:39,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:39,363 INFO L87 Difference]: Start difference. First operand 465 states and 1014 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:41,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:41,401 INFO L93 Difference]: Finished difference Result 806 states and 1627 transitions. [2021-07-09 18:04:41,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:04:41,402 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:41,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:41,403 INFO L225 Difference]: With dead ends: 806 [2021-07-09 18:04:41,403 INFO L226 Difference]: Without dead ends: 768 [2021-07-09 18:04:41,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 2052.4ms TimeCoverageRelationStatistics Valid=1216, Invalid=8684, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:04:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-07-09 18:04:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-07-09 18:04:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.184549356223176) internal successors, (1018), 466 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1018 transitions. [2021-07-09 18:04:41,412 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1018 transitions. Word has length 35 [2021-07-09 18:04:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:41,412 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1018 transitions. [2021-07-09 18:04:41,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1018 transitions. [2021-07-09 18:04:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:41,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:41,413 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:41,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 18:04:41,635 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1279676335, now seen corresponding path program 84 times [2021-07-09 18:04:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:41,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448072612] [2021-07-09 18:04:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:41,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:41,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448072612] [2021-07-09 18:04:41,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448072612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:41,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128300111] [2021-07-09 18:04:41,889 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:41,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:04:41,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:41,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:04:41,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128300111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:42,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:42,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:42,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840429825] [2021-07-09 18:04:42,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:42,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:42,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:42,398 INFO L87 Difference]: Start difference. First operand 467 states and 1018 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:45,569 INFO L93 Difference]: Finished difference Result 865 states and 1736 transitions. [2021-07-09 18:04:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-09 18:04:45,569 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:45,570 INFO L225 Difference]: With dead ends: 865 [2021-07-09 18:04:45,570 INFO L226 Difference]: Without dead ends: 820 [2021-07-09 18:04:45,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2909.8ms TimeCoverageRelationStatistics Valid=1448, Invalid=10984, Unknown=0, NotChecked=0, Total=12432 [2021-07-09 18:04:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-09 18:04:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 470. [2021-07-09 18:04:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-07-09 18:04:45,577 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-07-09 18:04:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:45,577 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-07-09 18:04:45,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-07-09 18:04:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:45,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:45,578 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:45,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:04:45,779 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:45,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:45,779 INFO L82 PathProgramCache]: Analyzing trace with hash 14748475, now seen corresponding path program 85 times [2021-07-09 18:04:45,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:45,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448223400] [2021-07-09 18:04:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:46,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:46,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448223400] [2021-07-09 18:04:46,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448223400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:46,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187329297] [2021-07-09 18:04:46,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:46,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:46,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:46,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187329297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:46,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:46,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:46,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076332317] [2021-07-09 18:04:46,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:46,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:46,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:46,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:46,439 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:48,573 INFO L93 Difference]: Finished difference Result 746 states and 1501 transitions. [2021-07-09 18:04:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:04:48,573 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:48,574 INFO L225 Difference]: With dead ends: 746 [2021-07-09 18:04:48,574 INFO L226 Difference]: Without dead ends: 719 [2021-07-09 18:04:48,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 2112.0ms TimeCoverageRelationStatistics Valid=1253, Invalid=7867, Unknown=0, NotChecked=0, Total=9120 [2021-07-09 18:04:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-07-09 18:04:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 470. [2021-07-09 18:04:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-07-09 18:04:48,580 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-07-09 18:04:48,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:48,580 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-07-09 18:04:48,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:48,580 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-07-09 18:04:48,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:48,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:48,581 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:48,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:04:48,782 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:48,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:48,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1579011027, now seen corresponding path program 86 times [2021-07-09 18:04:48,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:48,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667841404] [2021-07-09 18:04:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:49,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:49,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667841404] [2021-07-09 18:04:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667841404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:49,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235502310] [2021-07-09 18:04:49,011 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:49,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:49,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:49,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235502310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:49,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:49,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:49,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129331105] [2021-07-09 18:04:49,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:49,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:49,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:49,384 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:51,164 INFO L93 Difference]: Finished difference Result 776 states and 1568 transitions. [2021-07-09 18:04:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:04:51,165 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:51,165 INFO L225 Difference]: With dead ends: 776 [2021-07-09 18:04:51,165 INFO L226 Difference]: Without dead ends: 732 [2021-07-09 18:04:51,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 1761.3ms TimeCoverageRelationStatistics Valid=930, Invalid=7080, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:04:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-07-09 18:04:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 476. [2021-07-09 18:04:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.185263157894737) internal successors, (1038), 475 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1038 transitions. [2021-07-09 18:04:51,171 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1038 transitions. Word has length 35 [2021-07-09 18:04:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:51,171 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1038 transitions. [2021-07-09 18:04:51,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1038 transitions. [2021-07-09 18:04:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:51,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:51,172 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:51,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:04:51,377 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash -482968207, now seen corresponding path program 87 times [2021-07-09 18:04:51,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:51,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832588590] [2021-07-09 18:04:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:51,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:51,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832588590] [2021-07-09 18:04:51,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832588590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:51,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072291603] [2021-07-09 18:04:51,613 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:51,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:04:51,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:51,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:04:51,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:52,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072291603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:52,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:52,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:52,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813069218] [2021-07-09 18:04:52,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:52,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:52,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:52,219 INFO L87 Difference]: Start difference. First operand 476 states and 1038 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:54,701 INFO L93 Difference]: Finished difference Result 777 states and 1580 transitions. [2021-07-09 18:04:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:04:54,702 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:54,702 INFO L225 Difference]: With dead ends: 777 [2021-07-09 18:04:54,702 INFO L226 Difference]: Without dead ends: 739 [2021-07-09 18:04:54,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2419.1ms TimeCoverageRelationStatistics Valid=1089, Invalid=8613, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:04:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-07-09 18:04:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 482. [2021-07-09 18:04:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.191268191268191) internal successors, (1054), 481 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1054 transitions. [2021-07-09 18:04:54,708 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1054 transitions. Word has length 35 [2021-07-09 18:04:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:54,708 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1054 transitions. [2021-07-09 18:04:54,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1054 transitions. [2021-07-09 18:04:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:54,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:54,709 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:54,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:04:54,909 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash 349456309, now seen corresponding path program 88 times [2021-07-09 18:04:54,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:54,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313405965] [2021-07-09 18:04:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:55,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313405965] [2021-07-09 18:04:55,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313405965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19159205] [2021-07-09 18:04:55,248 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:55,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:55,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:55,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:55,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19159205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:55,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:55,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:55,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240764172] [2021-07-09 18:04:55,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:55,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:55,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:55,648 INFO L87 Difference]: Start difference. First operand 482 states and 1054 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:57,831 INFO L93 Difference]: Finished difference Result 849 states and 1716 transitions. [2021-07-09 18:04:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:04:57,831 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:04:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:57,832 INFO L225 Difference]: With dead ends: 849 [2021-07-09 18:04:57,832 INFO L226 Difference]: Without dead ends: 804 [2021-07-09 18:04:57,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 2191.7ms TimeCoverageRelationStatistics Valid=1198, Invalid=8504, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:04:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-07-09 18:04:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 486. [2021-07-09 18:04:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.195876288659794) internal successors, (1065), 485 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1065 transitions. [2021-07-09 18:04:57,838 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1065 transitions. Word has length 35 [2021-07-09 18:04:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:57,838 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1065 transitions. [2021-07-09 18:04:57,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:04:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1065 transitions. [2021-07-09 18:04:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:04:57,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:57,840 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:58,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:58,053 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:58,054 INFO L82 PathProgramCache]: Analyzing trace with hash -915471551, now seen corresponding path program 89 times [2021-07-09 18:04:58,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:58,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211133231] [2021-07-09 18:04:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:58,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:58,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211133231] [2021-07-09 18:04:58,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211133231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:58,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345489711] [2021-07-09 18:04:58,308 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:58,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:04:58,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:58,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:04:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:58,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345489711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:58,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:58,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:04:58,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444531309] [2021-07-09 18:04:58,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:58,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:58,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:58,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:58,690 INFO L87 Difference]: Start difference. First operand 486 states and 1065 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:00,678 INFO L93 Difference]: Finished difference Result 747 states and 1522 transitions. [2021-07-09 18:05:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:05:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:05:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:00,679 INFO L225 Difference]: With dead ends: 747 [2021-07-09 18:05:00,679 INFO L226 Difference]: Without dead ends: 720 [2021-07-09 18:05:00,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 1989.1ms TimeCoverageRelationStatistics Valid=1132, Invalid=7240, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:05:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-07-09 18:05:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 388. [2021-07-09 18:05:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.13953488372093) internal successors, (828), 387 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 828 transitions. [2021-07-09 18:05:00,684 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 828 transitions. Word has length 35 [2021-07-09 18:05:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:00,684 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 828 transitions. [2021-07-09 18:05:00,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 828 transitions. [2021-07-09 18:05:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:05:00,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:00,685 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:00,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:00,885 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1600337107, now seen corresponding path program 90 times [2021-07-09 18:05:00,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:00,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989232418] [2021-07-09 18:05:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:01,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:01,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989232418] [2021-07-09 18:05:01,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989232418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:01,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941201216] [2021-07-09 18:05:01,106 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:01,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:05:01,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:01,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:05:01,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:01,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941201216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:01,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:01,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:05:01,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950250320] [2021-07-09 18:05:01,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:05:01,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:01,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:05:01,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:01,578 INFO L87 Difference]: Start difference. First operand 388 states and 828 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:03,876 INFO L93 Difference]: Finished difference Result 635 states and 1250 transitions. [2021-07-09 18:05:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:05:03,876 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:05:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:03,877 INFO L225 Difference]: With dead ends: 635 [2021-07-09 18:05:03,877 INFO L226 Difference]: Without dead ends: 597 [2021-07-09 18:05:03,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 2277.1ms TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2021-07-09 18:05:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-09 18:05:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 392. [2021-07-09 18:05:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.1381074168797953) internal successors, (836), 391 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 836 transitions. [2021-07-09 18:05:03,882 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 836 transitions. Word has length 35 [2021-07-09 18:05:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:03,882 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 836 transitions. [2021-07-09 18:05:03,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 836 transitions. [2021-07-09 18:05:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:05:03,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:03,882 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:04,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:04,083 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:04,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:04,083 INFO L82 PathProgramCache]: Analyzing trace with hash -767912591, now seen corresponding path program 91 times [2021-07-09 18:05:04,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:04,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313333726] [2021-07-09 18:05:04,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:04,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:04,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313333726] [2021-07-09 18:05:04,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313333726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:04,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999581907] [2021-07-09 18:05:04,395 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:04,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:04,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:04,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999581907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:04,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:04,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:05:04,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866122879] [2021-07-09 18:05:04,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:05:04,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:05:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:04,799 INFO L87 Difference]: Start difference. First operand 392 states and 836 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:06,922 INFO L93 Difference]: Finished difference Result 700 states and 1368 transitions. [2021-07-09 18:05:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:05:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:05:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:06,923 INFO L225 Difference]: With dead ends: 700 [2021-07-09 18:05:06,923 INFO L226 Difference]: Without dead ends: 655 [2021-07-09 18:05:06,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 2216.1ms TimeCoverageRelationStatistics Valid=1195, Invalid=8705, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:05:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-09 18:05:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 394. [2021-07-09 18:05:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.1399491094147582) internal successors, (841), 393 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 841 transitions. [2021-07-09 18:05:06,928 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 841 transitions. Word has length 35 [2021-07-09 18:05:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:06,928 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 841 transitions. [2021-07-09 18:05:06,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:06,928 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 841 transitions. [2021-07-09 18:05:06,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:05:06,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:06,929 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:07,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-07-09 18:05:07,129 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:07,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2032840451, now seen corresponding path program 92 times [2021-07-09 18:05:07,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:07,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729296693] [2021-07-09 18:05:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:07,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729296693] [2021-07-09 18:05:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729296693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929285727] [2021-07-09 18:05:07,389 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:07,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:07,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:07,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929285727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:07,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:07,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:05:07,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785013588] [2021-07-09 18:05:07,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:05:07,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:05:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:07,796 INFO L87 Difference]: Start difference. First operand 394 states and 841 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:09,828 INFO L93 Difference]: Finished difference Result 618 states and 1227 transitions. [2021-07-09 18:05:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:05:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:05:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:09,829 INFO L225 Difference]: With dead ends: 618 [2021-07-09 18:05:09,829 INFO L226 Difference]: Without dead ends: 598 [2021-07-09 18:05:09,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 2016.7ms TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:05:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-07-09 18:05:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 382. [2021-07-09 18:05:09,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.120734908136483) internal successors, (808), 381 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 808 transitions. [2021-07-09 18:05:09,834 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 808 transitions. Word has length 35 [2021-07-09 18:05:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:09,834 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 808 transitions. [2021-07-09 18:05:09,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 808 transitions. [2021-07-09 18:05:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:05:09,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:09,835 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:10,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-09 18:05:10,036 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:10,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1796284973, now seen corresponding path program 93 times [2021-07-09 18:05:10,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:10,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370112772] [2021-07-09 18:05:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:10,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370112772] [2021-07-09 18:05:10,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370112772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:10,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220274782] [2021-07-09 18:05:10,284 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:10,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:05:10,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:10,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:05:10,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220274782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:10,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:10,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:05:10,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244071236] [2021-07-09 18:05:10,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:05:10,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:10,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:05:10,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:10,708 INFO L87 Difference]: Start difference. First operand 382 states and 808 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:13,461 INFO L93 Difference]: Finished difference Result 714 states and 1421 transitions. [2021-07-09 18:05:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-09 18:05:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:05:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:13,462 INFO L225 Difference]: With dead ends: 714 [2021-07-09 18:05:13,462 INFO L226 Difference]: Without dead ends: 666 [2021-07-09 18:05:13,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 2685.4ms TimeCoverageRelationStatistics Valid=1422, Invalid=10568, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:05:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-09 18:05:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 398. [2021-07-09 18:05:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.123425692695214) internal successors, (843), 397 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 843 transitions. [2021-07-09 18:05:13,467 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 843 transitions. Word has length 35 [2021-07-09 18:05:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:13,467 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 843 transitions. [2021-07-09 18:05:13,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 843 transitions. [2021-07-09 18:05:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:05:13,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:13,468 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:13,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 18:05:13,669 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:13,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:13,669 INFO L82 PathProgramCache]: Analyzing trace with hash 531357113, now seen corresponding path program 94 times [2021-07-09 18:05:13,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:13,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896854012] [2021-07-09 18:05:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:13,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:13,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896854012] [2021-07-09 18:05:13,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896854012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:13,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146726436] [2021-07-09 18:05:13,927 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:13,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:13,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:13,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:13,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:14,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146726436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:14,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:14,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-09 18:05:14,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604115699] [2021-07-09 18:05:14,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:05:14,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:14,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:05:14,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:14,347 INFO L87 Difference]: Start difference. First operand 398 states and 843 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:16,799 INFO L93 Difference]: Finished difference Result 728 states and 1445 transitions. [2021-07-09 18:05:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 18:05:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-09 18:05:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:16,801 INFO L225 Difference]: With dead ends: 728 [2021-07-09 18:05:16,801 INFO L226 Difference]: Without dead ends: 687 [2021-07-09 18:05:16,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 2363.7ms TimeCoverageRelationStatistics Valid=1275, Invalid=8427, Unknown=0, NotChecked=0, Total=9702 [2021-07-09 18:05:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-07-09 18:05:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 365. [2021-07-09 18:05:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.0851648351648353) internal successors, (759), 364 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 759 transitions. [2021-07-09 18:05:16,805 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 759 transitions. Word has length 35 [2021-07-09 18:05:16,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:16,806 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 759 transitions. [2021-07-09 18:05:16,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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) [2021-07-09 18:05:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 759 transitions. [2021-07-09 18:05:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:05:16,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:16,806 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:17,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:17,009 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:17,009 INFO L82 PathProgramCache]: Analyzing trace with hash 850528961, now seen corresponding path program 95 times [2021-07-09 18:05:17,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:17,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959802584] [2021-07-09 18:05:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:17,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959802584] [2021-07-09 18:05:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959802584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474150896] [2021-07-09 18:05:17,293 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:17,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:05:17,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:17,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:17,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474150896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:17,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:17,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-09 18:05:17,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736771308] [2021-07-09 18:05:17,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:05:17,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:05:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:05:17,869 INFO L87 Difference]: Start difference. First operand 365 states and 759 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:21,412 INFO L93 Difference]: Finished difference Result 641 states and 1294 transitions. [2021-07-09 18:05:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-09 18:05:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 35 [2021-07-09 18:05:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:21,413 INFO L225 Difference]: With dead ends: 641 [2021-07-09 18:05:21,413 INFO L226 Difference]: Without dead ends: 608 [2021-07-09 18:05:21,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3363.4ms TimeCoverageRelationStatistics Valid=1181, Invalid=8325, Unknown=0, NotChecked=0, Total=9506 [2021-07-09 18:05:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-09 18:05:21,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 381. [2021-07-09 18:05:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.081578947368421) internal successors, (791), 380 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 791 transitions. [2021-07-09 18:05:21,419 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 791 transitions. Word has length 35 [2021-07-09 18:05:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:21,419 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 791 transitions. [2021-07-09 18:05:21,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 791 transitions. [2021-07-09 18:05:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:05:21,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:21,420 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:21,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:21,633 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash 72244865, now seen corresponding path program 96 times [2021-07-09 18:05:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:21,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090787303] [2021-07-09 18:05:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:21,989 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-07-09 18:05:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:22,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:22,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090787303] [2021-07-09 18:05:22,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090787303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:22,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366073766] [2021-07-09 18:05:22,119 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:22,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:05:22,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:22,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:05:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:22,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366073766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:22,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:22,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-09 18:05:22,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020350059] [2021-07-09 18:05:22,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:05:22,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:22,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:05:22,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:05:22,580 INFO L87 Difference]: Start difference. First operand 381 states and 791 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-07-09 18:05:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:23,294 INFO L93 Difference]: Finished difference Result 540 states and 1106 transitions. [2021-07-09 18:05:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:05:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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 35 [2021-07-09 18:05:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:23,295 INFO L225 Difference]: With dead ends: 540 [2021-07-09 18:05:23,295 INFO L226 Difference]: Without dead ends: 533 [2021-07-09 18:05:23,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 956.5ms TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:05:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-09 18:05:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 385. [2021-07-09 18:05:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0807291666666665) internal successors, (799), 384 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 799 transitions. [2021-07-09 18:05:23,300 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 799 transitions. Word has length 35 [2021-07-09 18:05:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:23,300 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 799 transitions. [2021-07-09 18:05:23,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-07-09 18:05:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 799 transitions. [2021-07-09 18:05:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:05:23,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:23,300 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:23,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-07-09 18:05:23,501 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash 428848235, now seen corresponding path program 97 times [2021-07-09 18:05:23,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:23,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451021215] [2021-07-09 18:05:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:05:23,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:23,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451021215] [2021-07-09 18:05:23,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451021215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:23,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248241334] [2021-07-09 18:05:23,553 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:05:23,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:05:23,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248241334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:23,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:23,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 18:05:23,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339385028] [2021-07-09 18:05:23,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:05:23,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:05:23,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:05:23,653 INFO L87 Difference]: Start difference. First operand 385 states and 799 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:23,756 INFO L93 Difference]: Finished difference Result 609 states and 1226 transitions. [2021-07-09 18:05:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:05:23,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 37 [2021-07-09 18:05:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:23,757 INFO L225 Difference]: With dead ends: 609 [2021-07-09 18:05:23,757 INFO L226 Difference]: Without dead ends: 561 [2021-07-09 18:05:23,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:05:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-07-09 18:05:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 422. [2021-07-09 18:05:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0855106888361044) internal successors, (878), 421 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 878 transitions. [2021-07-09 18:05:23,761 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 878 transitions. Word has length 37 [2021-07-09 18:05:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:23,761 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 878 transitions. [2021-07-09 18:05:23,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 878 transitions. [2021-07-09 18:05:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:05:23,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:23,762 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:23,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:23,963 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:23,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:23,963 INFO L82 PathProgramCache]: Analyzing trace with hash 807325429, now seen corresponding path program 98 times [2021-07-09 18:05:23,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:23,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449794240] [2021-07-09 18:05:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:24,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:24,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449794240] [2021-07-09 18:05:24,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449794240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:24,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710069674] [2021-07-09 18:05:24,245 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:24,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:24,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:24,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:05:24,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:24,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710069674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:24,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:24,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-07-09 18:05:24,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858552614] [2021-07-09 18:05:24,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:24,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:24,753 INFO L87 Difference]: Start difference. First operand 422 states and 878 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:30,755 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-07-09 18:05:31,494 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-07-09 18:05:31,665 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-07-09 18:05:31,940 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-07-09 18:05:33,996 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-09 18:05:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:34,790 INFO L93 Difference]: Finished difference Result 1608 states and 3197 transitions. [2021-07-09 18:05:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-07-09 18:05:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:05:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:34,792 INFO L225 Difference]: With dead ends: 1608 [2021-07-09 18:05:34,792 INFO L226 Difference]: Without dead ends: 1540 [2021-07-09 18:05:34,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15558 ImplicationChecksByTransitivity, 9132.1ms TimeCoverageRelationStatistics Valid=4687, Invalid=33533, Unknown=0, NotChecked=0, Total=38220 [2021-07-09 18:05:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-07-09 18:05:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 585. [2021-07-09 18:05:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1113013698630136) internal successors, (1233), 584 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1233 transitions. [2021-07-09 18:05:34,802 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1233 transitions. Word has length 37 [2021-07-09 18:05:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:34,802 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1233 transitions. [2021-07-09 18:05:34,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1233 transitions. [2021-07-09 18:05:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:05:34,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:34,804 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:35,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:35,004 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1398345563, now seen corresponding path program 99 times [2021-07-09 18:05:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:35,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162998342] [2021-07-09 18:05:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:05:35,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:35,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162998342] [2021-07-09 18:05:35,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162998342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424035517] [2021-07-09 18:05:35,250 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:35,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:05:35,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:35,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:05:35,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:35,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424035517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:35,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-09 18:05:35,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93175471] [2021-07-09 18:05:35,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:35,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:35,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:35,775 INFO L87 Difference]: Start difference. First operand 585 states and 1233 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:38,124 INFO L93 Difference]: Finished difference Result 965 states and 1949 transitions. [2021-07-09 18:05:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:05:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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 37 [2021-07-09 18:05:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:38,125 INFO L225 Difference]: With dead ends: 965 [2021-07-09 18:05:38,125 INFO L226 Difference]: Without dead ends: 923 [2021-07-09 18:05:38,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 2156.1ms TimeCoverageRelationStatistics Valid=660, Invalid=7350, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:05:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-07-09 18:05:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 576. [2021-07-09 18:05:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.1043478260869564) internal successors, (1210), 575 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1210 transitions. [2021-07-09 18:05:38,132 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1210 transitions. Word has length 37 [2021-07-09 18:05:38,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:38,132 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1210 transitions. [2021-07-09 18:05:38,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1210 transitions. [2021-07-09 18:05:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:05:38,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:38,133 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:38,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 18:05:38,334 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:38,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:38,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1584538635, now seen corresponding path program 100 times [2021-07-09 18:05:38,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:38,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259138300] [2021-07-09 18:05:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:05:38,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259138300] [2021-07-09 18:05:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259138300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117539922] [2021-07-09 18:05:38,562 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:38,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:38,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:38,603 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:05:38,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:39,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117539922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:39,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:39,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-07-09 18:05:39,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212345865] [2021-07-09 18:05:39,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:05:39,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:05:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:39,002 INFO L87 Difference]: Start difference. First operand 576 states and 1210 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:39,881 INFO L93 Difference]: Finished difference Result 810 states and 1676 transitions. [2021-07-09 18:05:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:05:39,882 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:05:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:39,883 INFO L225 Difference]: With dead ends: 810 [2021-07-09 18:05:39,883 INFO L226 Difference]: Without dead ends: 790 [2021-07-09 18:05:39,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 864.8ms TimeCoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:05:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-07-09 18:05:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 536. [2021-07-09 18:05:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 2.1121495327102804) internal successors, (1130), 535 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1130 transitions. [2021-07-09 18:05:39,890 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1130 transitions. Word has length 37 [2021-07-09 18:05:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:39,890 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1130 transitions. [2021-07-09 18:05:39,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1130 transitions. [2021-07-09 18:05:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:05:39,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:39,891 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:40,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 18:05:40,115 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1136264889, now seen corresponding path program 101 times [2021-07-09 18:05:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:40,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913159605] [2021-07-09 18:05:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:40,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:40,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913159605] [2021-07-09 18:05:40,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913159605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:40,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736830960] [2021-07-09 18:05:40,351 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:40,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:05:40,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:40,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:05:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:40,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736830960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:40,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:40,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-07-09 18:05:40,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221242875] [2021-07-09 18:05:40,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:05:40,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:05:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:05:40,844 INFO L87 Difference]: Start difference. First operand 536 states and 1130 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:46,359 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 18:05:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:47,651 INFO L93 Difference]: Finished difference Result 1533 states and 3130 transitions. [2021-07-09 18:05:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-07-09 18:05:47,652 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:05:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:47,653 INFO L225 Difference]: With dead ends: 1533 [2021-07-09 18:05:47,653 INFO L226 Difference]: Without dead ends: 1494 [2021-07-09 18:05:47,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8152 ImplicationChecksByTransitivity, 6151.9ms TimeCoverageRelationStatistics Valid=2594, Invalid=18868, Unknown=0, NotChecked=0, Total=21462 [2021-07-09 18:05:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-07-09 18:05:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 599. [2021-07-09 18:05:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.100334448160535) internal successors, (1256), 598 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1256 transitions. [2021-07-09 18:05:47,662 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1256 transitions. Word has length 37 [2021-07-09 18:05:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:47,662 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1256 transitions. [2021-07-09 18:05:47,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1256 transitions. [2021-07-09 18:05:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:05:47,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:47,663 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:47,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-09 18:05:47,864 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 102 times [2021-07-09 18:05:47,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:47,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725400480] [2021-07-09 18:05:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:48,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:48,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725400480] [2021-07-09 18:05:48,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725400480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:48,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172056275] [2021-07-09 18:05:48,167 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:48,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:05:48,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:48,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:05:48,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:48,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172056275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:48,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:48,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:05:48,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693539594] [2021-07-09 18:05:48,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:05:48,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:48,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:05:48,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:05:48,617 INFO L87 Difference]: Start difference. First operand 599 states and 1256 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:50,551 INFO L93 Difference]: Finished difference Result 1197 states and 2449 transitions. [2021-07-09 18:05:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:05:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:05:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:50,553 INFO L225 Difference]: With dead ends: 1197 [2021-07-09 18:05:50,553 INFO L226 Difference]: Without dead ends: 1130 [2021-07-09 18:05:50,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 2028.9ms TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 18:05:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-07-09 18:05:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 752. [2021-07-09 18:05:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.1757656458055927) internal successors, (1634), 751 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1634 transitions. [2021-07-09 18:05:50,563 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1634 transitions. Word has length 39 [2021-07-09 18:05:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:50,563 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 1634 transitions. [2021-07-09 18:05:50,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1634 transitions. [2021-07-09 18:05:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:05:50,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:50,564 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:50,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:50,765 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1236547937, now seen corresponding path program 103 times [2021-07-09 18:05:50,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:50,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10556688] [2021-07-09 18:05:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:51,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:51,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10556688] [2021-07-09 18:05:51,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10556688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:51,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257401175] [2021-07-09 18:05:51,027 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:51,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:05:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:51,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257401175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:51,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:51,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:05:51,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447739771] [2021-07-09 18:05:51,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:05:51,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:05:51,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:05:51,465 INFO L87 Difference]: Start difference. First operand 752 states and 1634 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:53,636 INFO L93 Difference]: Finished difference Result 1229 states and 2502 transitions. [2021-07-09 18:05:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 18:05:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:05:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:53,638 INFO L225 Difference]: With dead ends: 1229 [2021-07-09 18:05:53,638 INFO L226 Difference]: Without dead ends: 1173 [2021-07-09 18:05:53,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 2104.5ms TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:05:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-09 18:05:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 754. [2021-07-09 18:05:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.1752988047808763) internal successors, (1638), 753 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1638 transitions. [2021-07-09 18:05:53,650 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1638 transitions. Word has length 39 [2021-07-09 18:05:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:53,650 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 1638 transitions. [2021-07-09 18:05:53,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1638 transitions. [2021-07-09 18:05:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:05:53,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:53,651 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:53,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-09 18:05:53,873 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:53,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:53,874 INFO L82 PathProgramCache]: Analyzing trace with hash 907136483, now seen corresponding path program 104 times [2021-07-09 18:05:53,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:53,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155194783] [2021-07-09 18:05:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:54,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:54,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155194783] [2021-07-09 18:05:54,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155194783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995750237] [2021-07-09 18:05:54,144 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:54,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:54,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:54,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:05:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:54,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995750237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:54,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:54,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:05:54,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286163070] [2021-07-09 18:05:54,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:05:54,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:05:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:05:54,594 INFO L87 Difference]: Start difference. First operand 754 states and 1638 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:56,827 INFO L93 Difference]: Finished difference Result 1227 states and 2500 transitions. [2021-07-09 18:05:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:05:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:05:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:56,829 INFO L225 Difference]: With dead ends: 1227 [2021-07-09 18:05:56,829 INFO L226 Difference]: Without dead ends: 1177 [2021-07-09 18:05:56,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 2198.2ms TimeCoverageRelationStatistics Valid=1311, Invalid=9609, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 18:05:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-07-09 18:05:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 756. [2021-07-09 18:05:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.174834437086093) internal successors, (1642), 755 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1642 transitions. [2021-07-09 18:05:56,838 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1642 transitions. Word has length 39 [2021-07-09 18:05:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:56,838 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1642 transitions. [2021-07-09 18:05:56,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1642 transitions. [2021-07-09 18:05:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:05:56,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:56,839 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:57,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-07-09 18:05:57,039 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:57,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1937298983, now seen corresponding path program 105 times [2021-07-09 18:05:57,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:57,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129117917] [2021-07-09 18:05:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:57,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:57,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129117917] [2021-07-09 18:05:57,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129117917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:57,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115276792] [2021-07-09 18:05:57,364 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:57,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:05:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:57,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:05:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:58,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115276792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:58,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:58,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:05:58,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304615484] [2021-07-09 18:05:58,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:05:58,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:58,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:05:58,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:05:58,017 INFO L87 Difference]: Start difference. First operand 756 states and 1642 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:01,733 INFO L93 Difference]: Finished difference Result 1231 states and 2510 transitions. [2021-07-09 18:06:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:06:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:01,735 INFO L225 Difference]: With dead ends: 1231 [2021-07-09 18:06:01,735 INFO L226 Difference]: Without dead ends: 1187 [2021-07-09 18:06:01,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4231 ImplicationChecksByTransitivity, 3425.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=13458, Unknown=0, NotChecked=0, Total=15006 [2021-07-09 18:06:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-07-09 18:06:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 758. [2021-07-09 18:06:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.1743725231175692) internal successors, (1646), 757 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1646 transitions. [2021-07-09 18:06:01,744 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1646 transitions. Word has length 39 [2021-07-09 18:06:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:01,744 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 1646 transitions. [2021-07-09 18:06:01,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1646 transitions. [2021-07-09 18:06:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:01,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:01,745 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:01,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:01,948 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:01,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1261625493, now seen corresponding path program 106 times [2021-07-09 18:06:01,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:01,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849340497] [2021-07-09 18:06:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:02,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:02,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849340497] [2021-07-09 18:06:02,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849340497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:02,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839775048] [2021-07-09 18:06:02,209 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:02,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:02,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:02,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:02,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839775048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:02,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:02,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:02,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702014687] [2021-07-09 18:06:02,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:02,655 INFO L87 Difference]: Start difference. First operand 758 states and 1646 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:05,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:05,305 INFO L93 Difference]: Finished difference Result 1225 states and 2500 transitions. [2021-07-09 18:06:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-09 18:06:05,305 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:05,306 INFO L225 Difference]: With dead ends: 1225 [2021-07-09 18:06:05,306 INFO L226 Difference]: Without dead ends: 1187 [2021-07-09 18:06:05,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 2437.3ms TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 18:06:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-07-09 18:06:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 760. [2021-07-09 18:06:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.1739130434782608) internal successors, (1650), 759 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1650 transitions. [2021-07-09 18:06:05,315 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1650 transitions. Word has length 39 [2021-07-09 18:06:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:05,315 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 1650 transitions. [2021-07-09 18:06:05,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1650 transitions. [2021-07-09 18:06:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:05,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:05,315 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:05,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:05,517 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -429200977, now seen corresponding path program 107 times [2021-07-09 18:06:05,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:05,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945311717] [2021-07-09 18:06:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:05,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:05,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945311717] [2021-07-09 18:06:05,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945311717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:05,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012568832] [2021-07-09 18:06:05,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:05,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:06:05,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:05,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:05,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:06,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012568832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:06,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:06,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:06,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604702118] [2021-07-09 18:06:06,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:06,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:06,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:06,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:06,277 INFO L87 Difference]: Start difference. First operand 760 states and 1650 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:09,186 INFO L93 Difference]: Finished difference Result 1282 states and 2603 transitions. [2021-07-09 18:06:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:06:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:09,188 INFO L225 Difference]: With dead ends: 1282 [2021-07-09 18:06:09,188 INFO L226 Difference]: Without dead ends: 1237 [2021-07-09 18:06:09,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 2758.2ms TimeCoverageRelationStatistics Valid=1736, Invalid=12306, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:06:09,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-07-09 18:06:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 763. [2021-07-09 18:06:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.1758530183727034) internal successors, (1658), 762 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:09,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1658 transitions. [2021-07-09 18:06:09,196 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1658 transitions. Word has length 39 [2021-07-09 18:06:09,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:09,196 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1658 transitions. [2021-07-09 18:06:09,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1658 transitions. [2021-07-09 18:06:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:09,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:09,197 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:09,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-09 18:06:09,397 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1694128837, now seen corresponding path program 108 times [2021-07-09 18:06:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:09,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727564854] [2021-07-09 18:06:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:09,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727564854] [2021-07-09 18:06:09,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727564854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792252680] [2021-07-09 18:06:09,685 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:09,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:06:09,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:09,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:06:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:10,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792252680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:10,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:10,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:10,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016926844] [2021-07-09 18:06:10,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:10,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:10,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:10,305 INFO L87 Difference]: Start difference. First operand 763 states and 1658 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:13,974 INFO L93 Difference]: Finished difference Result 1163 states and 2364 transitions. [2021-07-09 18:06:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-09 18:06:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:13,976 INFO L225 Difference]: With dead ends: 1163 [2021-07-09 18:06:13,976 INFO L226 Difference]: Without dead ends: 1136 [2021-07-09 18:06:13,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 3284.8ms TimeCoverageRelationStatistics Valid=1767, Invalid=12513, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:06:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-07-09 18:06:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 782. [2021-07-09 18:06:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.17797695262484) internal successors, (1701), 781 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1701 transitions. [2021-07-09 18:06:13,985 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1701 transitions. Word has length 39 [2021-07-09 18:06:13,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:13,985 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1701 transitions. [2021-07-09 18:06:13,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1701 transitions. [2021-07-09 18:06:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:13,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:13,986 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:14,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:14,186 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:14,186 INFO L82 PathProgramCache]: Analyzing trace with hash 318889065, now seen corresponding path program 109 times [2021-07-09 18:06:14,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:14,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173964037] [2021-07-09 18:06:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:14,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:14,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173964037] [2021-07-09 18:06:14,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173964037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:14,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155227404] [2021-07-09 18:06:14,458 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:14,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:14,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:14,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155227404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:14,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:14,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:14,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930224356] [2021-07-09 18:06:14,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:14,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:14,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:14,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:14,901 INFO L87 Difference]: Start difference. First operand 782 states and 1701 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:17,001 INFO L93 Difference]: Finished difference Result 1209 states and 2470 transitions. [2021-07-09 18:06:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:06:17,001 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:17,002 INFO L225 Difference]: With dead ends: 1209 [2021-07-09 18:06:17,002 INFO L226 Difference]: Without dead ends: 1159 [2021-07-09 18:06:17,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 2066.6ms TimeCoverageRelationStatistics Valid=1134, Invalid=8766, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:06:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-09 18:06:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 784. [2021-07-09 18:06:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.177522349936143) internal successors, (1705), 783 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1705 transitions. [2021-07-09 18:06:17,011 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1705 transitions. Word has length 39 [2021-07-09 18:06:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:17,011 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1705 transitions. [2021-07-09 18:06:17,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1705 transitions. [2021-07-09 18:06:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:17,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:17,012 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:17,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:17,212 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1349051565, now seen corresponding path program 110 times [2021-07-09 18:06:17,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:17,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412634209] [2021-07-09 18:06:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:17,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:17,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412634209] [2021-07-09 18:06:17,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412634209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:17,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477744819] [2021-07-09 18:06:17,461 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:17,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:17,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:17,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477744819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:17,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:17,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:17,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347774472] [2021-07-09 18:06:17,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:17,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:17,920 INFO L87 Difference]: Start difference. First operand 784 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:20,040 INFO L93 Difference]: Finished difference Result 1212 states and 2490 transitions. [2021-07-09 18:06:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:06:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:20,042 INFO L225 Difference]: With dead ends: 1212 [2021-07-09 18:06:20,042 INFO L226 Difference]: Without dead ends: 1168 [2021-07-09 18:06:20,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 2144.4ms TimeCoverageRelationStatistics Valid=1265, Invalid=9655, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 18:06:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-07-09 18:06:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 794. [2021-07-09 18:06:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.1853720050441363) internal successors, (1733), 793 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1733 transitions. [2021-07-09 18:06:20,050 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1733 transitions. Word has length 39 [2021-07-09 18:06:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:20,050 INFO L482 AbstractCegarLoop]: Abstraction has 794 states and 1733 transitions. [2021-07-09 18:06:20,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1733 transitions. [2021-07-09 18:06:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:20,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:20,051 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:20,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 18:06:20,252 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:20,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1849872911, now seen corresponding path program 111 times [2021-07-09 18:06:20,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:20,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151723812] [2021-07-09 18:06:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:20,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:20,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151723812] [2021-07-09 18:06:20,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151723812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:20,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819398849] [2021-07-09 18:06:20,531 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:20,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:06:20,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:20,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:06:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:21,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819398849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:21,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:21,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:21,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527013070] [2021-07-09 18:06:21,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:21,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:21,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:21,133 INFO L87 Difference]: Start difference. First operand 794 states and 1733 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:24,416 INFO L93 Difference]: Finished difference Result 1224 states and 2528 transitions. [2021-07-09 18:06:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:06:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:24,417 INFO L225 Difference]: With dead ends: 1224 [2021-07-09 18:06:24,417 INFO L226 Difference]: Without dead ends: 1186 [2021-07-09 18:06:24,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 2973.6ms TimeCoverageRelationStatistics Valid=1462, Invalid=11878, Unknown=0, NotChecked=0, Total=13340 [2021-07-09 18:06:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-07-09 18:06:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 804. [2021-07-09 18:06:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.1930261519302614) internal successors, (1761), 803 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1761 transitions. [2021-07-09 18:06:24,426 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1761 transitions. Word has length 39 [2021-07-09 18:06:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:24,426 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 1761 transitions. [2021-07-09 18:06:24,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1761 transitions. [2021-07-09 18:06:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:24,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:24,433 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:24,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-09 18:06:24,633 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:24,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1017448395, now seen corresponding path program 112 times [2021-07-09 18:06:24,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:24,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816430630] [2021-07-09 18:06:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:24,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816430630] [2021-07-09 18:06:24,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816430630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:24,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68487946] [2021-07-09 18:06:24,920 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:24,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:24,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:25,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68487946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:25,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:25,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:25,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022730090] [2021-07-09 18:06:25,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:25,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:25,357 INFO L87 Difference]: Start difference. First operand 804 states and 1761 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:28,112 INFO L93 Difference]: Finished difference Result 1310 states and 2688 transitions. [2021-07-09 18:06:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:06:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:28,114 INFO L225 Difference]: With dead ends: 1310 [2021-07-09 18:06:28,114 INFO L226 Difference]: Without dead ends: 1265 [2021-07-09 18:06:28,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3959 ImplicationChecksByTransitivity, 2567.3ms TimeCoverageRelationStatistics Valid=1571, Invalid=11311, Unknown=0, NotChecked=0, Total=12882 [2021-07-09 18:06:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-07-09 18:06:28,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 808. [2021-07-09 18:06:28,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.195786864931846) internal successors, (1772), 807 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1772 transitions. [2021-07-09 18:06:28,123 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1772 transitions. Word has length 39 [2021-07-09 18:06:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:28,123 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 1772 transitions. [2021-07-09 18:06:28,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1772 transitions. [2021-07-09 18:06:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:28,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:28,124 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:28,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:28,325 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2012591041, now seen corresponding path program 113 times [2021-07-09 18:06:28,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:28,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425778431] [2021-07-09 18:06:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:28,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425778431] [2021-07-09 18:06:28,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425778431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543113104] [2021-07-09 18:06:28,614 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:28,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:06:28,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:28,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:29,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543113104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:29,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:29,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:29,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665124787] [2021-07-09 18:06:29,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:29,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:29,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:29,082 INFO L87 Difference]: Start difference. First operand 808 states and 1772 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:31,549 INFO L93 Difference]: Finished difference Result 1169 states and 2413 transitions. [2021-07-09 18:06:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:06:31,549 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:31,551 INFO L225 Difference]: With dead ends: 1169 [2021-07-09 18:06:31,551 INFO L226 Difference]: Without dead ends: 1142 [2021-07-09 18:06:31,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 2409.0ms TimeCoverageRelationStatistics Valid=1492, Invalid=9638, Unknown=0, NotChecked=0, Total=11130 [2021-07-09 18:06:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-07-09 18:06:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 774. [2021-07-09 18:06:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.179818887451488) internal successors, (1685), 773 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1685 transitions. [2021-07-09 18:06:31,560 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1685 transitions. Word has length 39 [2021-07-09 18:06:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:31,560 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1685 transitions. [2021-07-09 18:06:31,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1685 transitions. [2021-07-09 18:06:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:31,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:31,561 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:31,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:31,777 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1299362665, now seen corresponding path program 114 times [2021-07-09 18:06:31,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:31,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995729682] [2021-07-09 18:06:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:32,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:32,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995729682] [2021-07-09 18:06:32,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995729682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:32,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220093948] [2021-07-09 18:06:32,054 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:32,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:06:32,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:32,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-09 18:06:32,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:32,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220093948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:32,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:32,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:32,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744176362] [2021-07-09 18:06:32,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:32,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:32,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:32,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:32,516 INFO L87 Difference]: Start difference. First operand 774 states and 1685 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:34,799 INFO L93 Difference]: Finished difference Result 1152 states and 2354 transitions. [2021-07-09 18:06:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:06:34,799 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:34,800 INFO L225 Difference]: With dead ends: 1152 [2021-07-09 18:06:34,800 INFO L226 Difference]: Without dead ends: 1108 [2021-07-09 18:06:34,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 2267.2ms TimeCoverageRelationStatistics Valid=1243, Invalid=9887, Unknown=0, NotChecked=0, Total=11130 [2021-07-09 18:06:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-07-09 18:06:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 776. [2021-07-09 18:06:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.1793548387096773) internal successors, (1689), 775 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1689 transitions. [2021-07-09 18:06:34,809 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1689 transitions. Word has length 39 [2021-07-09 18:06:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:34,809 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 1689 transitions. [2021-07-09 18:06:34,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1689 transitions. [2021-07-09 18:06:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:34,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:34,810 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:35,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:35,011 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:35,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:35,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1899561811, now seen corresponding path program 115 times [2021-07-09 18:06:35,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:35,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881867849] [2021-07-09 18:06:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:35,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:35,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881867849] [2021-07-09 18:06:35,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881867849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:35,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461372891] [2021-07-09 18:06:35,295 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:35,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:35,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:35,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461372891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:35,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:35,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:35,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247433551] [2021-07-09 18:06:35,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:35,737 INFO L87 Difference]: Start difference. First operand 776 states and 1689 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:38,086 INFO L93 Difference]: Finished difference Result 1157 states and 2374 transitions. [2021-07-09 18:06:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:06:38,086 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:38,087 INFO L225 Difference]: With dead ends: 1157 [2021-07-09 18:06:38,087 INFO L226 Difference]: Without dead ends: 1119 [2021-07-09 18:06:38,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 2339.5ms TimeCoverageRelationStatistics Valid=1411, Invalid=10799, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 18:06:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-09 18:06:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 782. [2021-07-09 18:06:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.183098591549296) internal successors, (1705), 781 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1705 transitions. [2021-07-09 18:06:38,096 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1705 transitions. Word has length 39 [2021-07-09 18:06:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:38,096 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1705 transitions. [2021-07-09 18:06:38,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1705 transitions. [2021-07-09 18:06:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:38,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:38,097 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:38,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-09 18:06:38,297 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1067137295, now seen corresponding path program 116 times [2021-07-09 18:06:38,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:38,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862768474] [2021-07-09 18:06:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:38,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862768474] [2021-07-09 18:06:38,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862768474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96070276] [2021-07-09 18:06:38,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:38,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:38,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:38,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:38,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:39,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96070276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:39,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:39,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:39,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547447415] [2021-07-09 18:06:39,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:39,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:39,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:39,073 INFO L87 Difference]: Start difference. First operand 782 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:41,696 INFO L93 Difference]: Finished difference Result 1249 states and 2546 transitions. [2021-07-09 18:06:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:06:41,697 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:41,698 INFO L225 Difference]: With dead ends: 1249 [2021-07-09 18:06:41,698 INFO L226 Difference]: Without dead ends: 1204 [2021-07-09 18:06:41,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4088 ImplicationChecksByTransitivity, 2639.5ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 18:06:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-07-09 18:06:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 786. [2021-07-09 18:06:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.1859872611464968) internal successors, (1716), 785 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1716 transitions. [2021-07-09 18:06:41,707 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1716 transitions. Word has length 39 [2021-07-09 18:06:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:41,707 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1716 transitions. [2021-07-09 18:06:41,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1716 transitions. [2021-07-09 18:06:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:41,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:41,708 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:41,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-09 18:06:41,908 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:41,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1962902141, now seen corresponding path program 117 times [2021-07-09 18:06:41,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:41,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451014765] [2021-07-09 18:06:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:42,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:42,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451014765] [2021-07-09 18:06:42,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451014765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:42,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277588365] [2021-07-09 18:06:42,197 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:42,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:06:42,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:42,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:06:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277588365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:42,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:42,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:42,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095190373] [2021-07-09 18:06:42,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:42,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:42,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:42,884 INFO L87 Difference]: Start difference. First operand 786 states and 1716 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:46,745 INFO L93 Difference]: Finished difference Result 1162 states and 2375 transitions. [2021-07-09 18:06:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-09 18:06:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:46,747 INFO L225 Difference]: With dead ends: 1162 [2021-07-09 18:06:46,747 INFO L226 Difference]: Without dead ends: 1121 [2021-07-09 18:06:46,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 3609.1ms TimeCoverageRelationStatistics Valid=1607, Invalid=12673, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:06:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-07-09 18:06:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 604. [2021-07-09 18:06:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.1160862354892207) internal successors, (1276), 603 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1276 transitions. [2021-07-09 18:06:46,754 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1276 transitions. Word has length 39 [2021-07-09 18:06:46,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:46,754 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1276 transitions. [2021-07-09 18:06:46,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1276 transitions. [2021-07-09 18:06:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:46,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:46,755 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:46,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:46,956 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:46,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1278036585, now seen corresponding path program 118 times [2021-07-09 18:06:46,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:46,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041145369] [2021-07-09 18:06:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:47,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:47,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041145369] [2021-07-09 18:06:47,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041145369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:47,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665141905] [2021-07-09 18:06:47,215 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:47,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:47,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:47,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:47,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:47,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665141905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:47,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:47,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:47,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996756772] [2021-07-09 18:06:47,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:47,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:47,677 INFO L87 Difference]: Start difference. First operand 604 states and 1276 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:50,100 INFO L93 Difference]: Finished difference Result 922 states and 1823 transitions. [2021-07-09 18:06:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:06:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:50,101 INFO L225 Difference]: With dead ends: 922 [2021-07-09 18:06:50,101 INFO L226 Difference]: Without dead ends: 884 [2021-07-09 18:06:50,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2373.1ms TimeCoverageRelationStatistics Valid=1385, Invalid=11047, Unknown=0, NotChecked=0, Total=12432 [2021-07-09 18:06:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-09 18:06:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 606. [2021-07-09 18:06:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.115702479338843) internal successors, (1280), 605 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1280 transitions. [2021-07-09 18:06:50,108 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1280 transitions. Word has length 39 [2021-07-09 18:06:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:50,108 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1280 transitions. [2021-07-09 18:06:50,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1280 transitions. [2021-07-09 18:06:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:50,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:50,108 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:50,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-07-09 18:06:50,309 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2110461101, now seen corresponding path program 119 times [2021-07-09 18:06:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:50,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19848154] [2021-07-09 18:06:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:50,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19848154] [2021-07-09 18:06:50,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19848154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306223254] [2021-07-09 18:06:50,608 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:50,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:06:50,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:50,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:51,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306223254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:51,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:51,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:51,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789353225] [2021-07-09 18:06:51,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:51,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:51,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:51,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:51,057 INFO L87 Difference]: Start difference. First operand 606 states and 1280 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:53,820 INFO L93 Difference]: Finished difference Result 1010 states and 1983 transitions. [2021-07-09 18:06:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:06:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:53,821 INFO L225 Difference]: With dead ends: 1010 [2021-07-09 18:06:53,821 INFO L226 Difference]: Without dead ends: 965 [2021-07-09 18:06:53,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4228 ImplicationChecksByTransitivity, 2636.3ms TimeCoverageRelationStatistics Valid=1571, Invalid=11769, Unknown=0, NotChecked=0, Total=13340 [2021-07-09 18:06:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-07-09 18:06:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 608. [2021-07-09 18:06:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 2.116968698517298) internal successors, (1285), 607 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1285 transitions. [2021-07-09 18:06:53,828 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1285 transitions. Word has length 39 [2021-07-09 18:06:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:53,828 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1285 transitions. [2021-07-09 18:06:53,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1285 transitions. [2021-07-09 18:06:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:53,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:53,829 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:54,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-09 18:06:54,030 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash 845533241, now seen corresponding path program 120 times [2021-07-09 18:06:54,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:54,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485407037] [2021-07-09 18:06:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:54,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485407037] [2021-07-09 18:06:54,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485407037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:54,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791739771] [2021-07-09 18:06:54,321 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:54,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:06:54,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:54,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:06:54,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:54,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791739771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:54,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:54,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:54,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249433726] [2021-07-09 18:06:54,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:54,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:54,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:54,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:54,875 INFO L87 Difference]: Start difference. First operand 608 states and 1285 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:58,018 INFO L93 Difference]: Finished difference Result 1026 states and 2029 transitions. [2021-07-09 18:06:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:06:58,018 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:06:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:58,019 INFO L225 Difference]: With dead ends: 1026 [2021-07-09 18:06:58,019 INFO L226 Difference]: Without dead ends: 978 [2021-07-09 18:06:58,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 2974.1ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 18:06:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-07-09 18:06:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 595. [2021-07-09 18:06:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.1026936026936025) internal successors, (1249), 594 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1249 transitions. [2021-07-09 18:06:58,026 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1249 transitions. Word has length 39 [2021-07-09 18:06:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:58,026 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1249 transitions. [2021-07-09 18:06:58,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1249 transitions. [2021-07-09 18:06:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:58,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:58,027 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:58,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:58,227 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:58,227 INFO L82 PathProgramCache]: Analyzing trace with hash 379691369, now seen corresponding path program 121 times [2021-07-09 18:06:58,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:58,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669823022] [2021-07-09 18:06:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:58,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:58,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669823022] [2021-07-09 18:06:58,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669823022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:58,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143979729] [2021-07-09 18:06:58,465 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:58,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:06:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:58,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143979729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:58,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:58,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-09 18:06:58,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182180344] [2021-07-09 18:06:58,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:06:58,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:58,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:06:58,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:58,911 INFO L87 Difference]: Start difference. First operand 595 states and 1249 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:02,091 INFO L93 Difference]: Finished difference Result 1028 states and 2059 transitions. [2021-07-09 18:07:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-09 18:07:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:07:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:02,093 INFO L225 Difference]: With dead ends: 1028 [2021-07-09 18:07:02,093 INFO L226 Difference]: Without dead ends: 971 [2021-07-09 18:07:02,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5278 ImplicationChecksByTransitivity, 2987.9ms TimeCoverageRelationStatistics Valid=1778, Invalid=13972, Unknown=0, NotChecked=0, Total=15750 [2021-07-09 18:07:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-07-09 18:07:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 605. [2021-07-09 18:07:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.1009933774834435) internal successors, (1269), 604 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1269 transitions. [2021-07-09 18:07:02,101 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1269 transitions. Word has length 39 [2021-07-09 18:07:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:02,101 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1269 transitions. [2021-07-09 18:07:02,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1269 transitions. [2021-07-09 18:07:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:02,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:02,102 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:02,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-09 18:07:02,302 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:02,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash -115557073, now seen corresponding path program 122 times [2021-07-09 18:07:02,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:02,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267177447] [2021-07-09 18:07:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:02,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:02,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267177447] [2021-07-09 18:07:02,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267177447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:02,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651377147] [2021-07-09 18:07:02,514 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:02,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:02,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:02,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:02,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651377147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:02,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:02,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-07-09 18:07:02,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738972999] [2021-07-09 18:07:02,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:02,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:02,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:02,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:02,959 INFO L87 Difference]: Start difference. First operand 605 states and 1269 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:05,945 INFO L93 Difference]: Finished difference Result 1122 states and 2231 transitions. [2021-07-09 18:07:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-09 18:07:05,945 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:07:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:05,947 INFO L225 Difference]: With dead ends: 1122 [2021-07-09 18:07:05,947 INFO L226 Difference]: Without dead ends: 1043 [2021-07-09 18:07:05,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 2579.4ms TimeCoverageRelationStatistics Valid=1670, Invalid=11902, Unknown=0, NotChecked=0, Total=13572 [2021-07-09 18:07:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-07-09 18:07:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 576. [2021-07-09 18:07:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-07-09 18:07:05,954 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 39 [2021-07-09 18:07:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:05,954 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-07-09 18:07:05,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-07-09 18:07:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:05,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:05,954 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:06,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:06,155 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2015955197, now seen corresponding path program 123 times [2021-07-09 18:07:06,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:06,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311289736] [2021-07-09 18:07:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:06,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311289736] [2021-07-09 18:07:06,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311289736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:06,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552817475] [2021-07-09 18:07:06,446 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:06,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 18:07:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:06,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-09 18:07:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:07,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552817475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:07,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:07,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-07-09 18:07:07,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185804879] [2021-07-09 18:07:07,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:07:07,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:07,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:07:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:07:07,047 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-07-09 18:07:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:11,521 INFO L93 Difference]: Finished difference Result 956 states and 1931 transitions. [2021-07-09 18:07:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 18:07:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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 39 [2021-07-09 18:07:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:11,522 INFO L225 Difference]: With dead ends: 956 [2021-07-09 18:07:11,522 INFO L226 Difference]: Without dead ends: 917 [2021-07-09 18:07:11,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 4277.1ms TimeCoverageRelationStatistics Valid=1504, Invalid=12776, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:07:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-07-09 18:07:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 508. [2021-07-09 18:07:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.078895463510848) internal successors, (1054), 507 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1054 transitions. [2021-07-09 18:07:11,528 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1054 transitions. Word has length 39 [2021-07-09 18:07:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:11,528 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1054 transitions. [2021-07-09 18:07:11,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-07-09 18:07:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1054 transitions. [2021-07-09 18:07:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:11,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:11,529 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:11,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-07-09 18:07:11,729 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash 963177715, now seen corresponding path program 124 times [2021-07-09 18:07:11,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:11,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152778039] [2021-07-09 18:07:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:12,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:12,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152778039] [2021-07-09 18:07:12,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152778039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:12,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242356637] [2021-07-09 18:07:12,120 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:12,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:12,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:12,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:12,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242356637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:12,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:12,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-07-09 18:07:12,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101841156] [2021-07-09 18:07:12,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:12,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:12,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:12,698 INFO L87 Difference]: Start difference. First operand 508 states and 1054 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:14,061 INFO L93 Difference]: Finished difference Result 1041 states and 2115 transitions. [2021-07-09 18:07:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:07:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:07:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:14,063 INFO L225 Difference]: With dead ends: 1041 [2021-07-09 18:07:14,063 INFO L226 Difference]: Without dead ends: 1034 [2021-07-09 18:07:14,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1306.3ms TimeCoverageRelationStatistics Valid=262, Invalid=3160, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:07:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-09 18:07:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 524. [2021-07-09 18:07:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.0764818355640537) internal successors, (1086), 523 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1086 transitions. [2021-07-09 18:07:14,074 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1086 transitions. Word has length 39 [2021-07-09 18:07:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:14,074 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1086 transitions. [2021-07-09 18:07:14,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1086 transitions. [2021-07-09 18:07:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:07:14,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:14,075 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:14,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:14,276 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:14,276 INFO L82 PathProgramCache]: Analyzing trace with hash -892338777, now seen corresponding path program 125 times [2021-07-09 18:07:14,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:14,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479572281] [2021-07-09 18:07:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:07:14,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:14,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479572281] [2021-07-09 18:07:14,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479572281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:14,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589600337] [2021-07-09 18:07:14,337 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:14,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:07:14,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:14,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:07:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:07:14,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589600337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:14,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:14,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 18:07:14,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730396801] [2021-07-09 18:07:14,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:07:14,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:14,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:07:14,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:07:14,423 INFO L87 Difference]: Start difference. First operand 524 states and 1086 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) [2021-07-09 18:07:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:14,546 INFO L93 Difference]: Finished difference Result 816 states and 1639 transitions. [2021-07-09 18:07:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:07:14,546 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 41 [2021-07-09 18:07:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:14,547 INFO L225 Difference]: With dead ends: 816 [2021-07-09 18:07:14,547 INFO L226 Difference]: Without dead ends: 759 [2021-07-09 18:07:14,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:07:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-07-09 18:07:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-07-09 18:07:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.08273381294964) internal successors, (1158), 556 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1158 transitions. [2021-07-09 18:07:14,552 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1158 transitions. Word has length 41 [2021-07-09 18:07:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:14,553 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1158 transitions. [2021-07-09 18:07:14,553 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) [2021-07-09 18:07:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1158 transitions. [2021-07-09 18:07:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:07:14,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:14,553 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:14,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-07-09 18:07:14,756 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash 141760501, now seen corresponding path program 126 times [2021-07-09 18:07:14,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:14,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236835156] [2021-07-09 18:07:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:15,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:15,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236835156] [2021-07-09 18:07:15,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236835156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:15,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013461191] [2021-07-09 18:07:15,082 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:15,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:07:15,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:15,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 18:07:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:15,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013461191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:15,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:15,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-07-09 18:07:15,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72976447] [2021-07-09 18:07:15,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:07:15,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:15,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:07:15,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:07:15,668 INFO L87 Difference]: Start difference. First operand 557 states and 1158 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:22,522 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-09 18:07:23,981 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-07-09 18:07:24,147 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-07-09 18:07:24,287 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-09 18:07:25,360 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-07-09 18:07:25,562 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-07-09 18:07:25,703 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-09 18:07:25,891 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-09 18:07:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:32,210 INFO L93 Difference]: Finished difference Result 2491 states and 4951 transitions. [2021-07-09 18:07:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2021-07-09 18:07:32,210 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:07:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:32,213 INFO L225 Difference]: With dead ends: 2491 [2021-07-09 18:07:32,213 INFO L226 Difference]: Without dead ends: 2423 [2021-07-09 18:07:32,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32989 ImplicationChecksByTransitivity, 14512.1ms TimeCoverageRelationStatistics Valid=8903, Invalid=67549, Unknown=0, NotChecked=0, Total=76452 [2021-07-09 18:07:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-07-09 18:07:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 830. [2021-07-09 18:07:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.1049457177322073) internal successors, (1745), 829 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1745 transitions. [2021-07-09 18:07:32,231 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1745 transitions. Word has length 41 [2021-07-09 18:07:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:32,231 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 1745 transitions. [2021-07-09 18:07:32,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1745 transitions. [2021-07-09 18:07:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:07:32,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:32,232 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:32,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:32,437 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2063910491, now seen corresponding path program 127 times [2021-07-09 18:07:32,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:32,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563156701] [2021-07-09 18:07:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:32,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:32,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563156701] [2021-07-09 18:07:32,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563156701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:32,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083186132] [2021-07-09 18:07:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:32,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:07:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:33,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083186132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:33,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:33,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-07-09 18:07:33,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503582565] [2021-07-09 18:07:33,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:07:33,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:07:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:07:33,251 INFO L87 Difference]: Start difference. First operand 830 states and 1745 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:35,794 INFO L93 Difference]: Finished difference Result 1299 states and 2636 transitions. [2021-07-09 18:07:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:07:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:07:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:35,796 INFO L225 Difference]: With dead ends: 1299 [2021-07-09 18:07:35,796 INFO L226 Difference]: Without dead ends: 1267 [2021-07-09 18:07:35,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 2371.6ms TimeCoverageRelationStatistics Valid=743, Invalid=9969, Unknown=0, NotChecked=0, Total=10712 [2021-07-09 18:07:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-09 18:07:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 857. [2021-07-09 18:07:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.100467289719626) internal successors, (1798), 856 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1798 transitions. [2021-07-09 18:07:35,807 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1798 transitions. Word has length 41 [2021-07-09 18:07:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:35,807 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 1798 transitions. [2021-07-09 18:07:35,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1798 transitions. [2021-07-09 18:07:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:07:35,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:35,808 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:36,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-07-09 18:07:36,008 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:36,009 INFO L82 PathProgramCache]: Analyzing trace with hash -670644875, now seen corresponding path program 128 times [2021-07-09 18:07:36,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:36,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609538162] [2021-07-09 18:07:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:36,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:36,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609538162] [2021-07-09 18:07:36,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609538162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:36,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341443282] [2021-07-09 18:07:36,274 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:36,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:36,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:07:36,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:36,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341443282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:36,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:36,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-07-09 18:07:36,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50312327] [2021-07-09 18:07:36,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:36,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:36,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:36,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:36,816 INFO L87 Difference]: Start difference. First operand 857 states and 1798 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:39,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:39,021 INFO L93 Difference]: Finished difference Result 1376 states and 2792 transitions. [2021-07-09 18:07:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:07:39,022 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:07:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:39,023 INFO L225 Difference]: With dead ends: 1376 [2021-07-09 18:07:39,023 INFO L226 Difference]: Without dead ends: 1337 [2021-07-09 18:07:39,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 2011.7ms TimeCoverageRelationStatistics Valid=666, Invalid=7890, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:07:39,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-07-09 18:07:39,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 848. [2021-07-09 18:07:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 2.0968122786304604) internal successors, (1776), 847 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1776 transitions. [2021-07-09 18:07:39,032 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1776 transitions. Word has length 41 [2021-07-09 18:07:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:39,032 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 1776 transitions. [2021-07-09 18:07:39,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1776 transitions. [2021-07-09 18:07:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:07:39,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:39,033 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:39,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:39,234 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash 34337835, now seen corresponding path program 129 times [2021-07-09 18:07:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:39,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522341133] [2021-07-09 18:07:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:07:39,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:39,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522341133] [2021-07-09 18:07:39,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522341133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:39,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391659203] [2021-07-09 18:07:39,485 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:39,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:07:39,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:39,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:07:39,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:39,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391659203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:39,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:39,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-07-09 18:07:39,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978057705] [2021-07-09 18:07:39,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:39,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:39,987 INFO L87 Difference]: Start difference. First operand 848 states and 1776 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:42,130 INFO L93 Difference]: Finished difference Result 1147 states and 2347 transitions. [2021-07-09 18:07:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:07:42,130 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:07:42,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:42,132 INFO L225 Difference]: With dead ends: 1147 [2021-07-09 18:07:42,132 INFO L226 Difference]: Without dead ends: 1089 [2021-07-09 18:07:42,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 1929.5ms TimeCoverageRelationStatistics Valid=561, Invalid=7449, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:07:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-07-09 18:07:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 744. [2021-07-09 18:07:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.1049798115746974) internal successors, (1564), 743 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1564 transitions. [2021-07-09 18:07:42,139 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1564 transitions. Word has length 41 [2021-07-09 18:07:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:42,140 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 1564 transitions. [2021-07-09 18:07:42,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1564 transitions. [2021-07-09 18:07:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:07:42,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:42,140 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:42,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-09 18:07:42,341 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash -749611727, now seen corresponding path program 130 times [2021-07-09 18:07:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:42,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461544389] [2021-07-09 18:07:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:42,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:42,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461544389] [2021-07-09 18:07:42,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461544389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:42,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633883926] [2021-07-09 18:07:42,567 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:42,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:42,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:42,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 18:07:42,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:43,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633883926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:43,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:43,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-07-09 18:07:43,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113704830] [2021-07-09 18:07:43,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:43,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:43,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:43,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:43,073 INFO L87 Difference]: Start difference. First operand 744 states and 1564 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:44,368 INFO L93 Difference]: Finished difference Result 1254 states and 2587 transitions. [2021-07-09 18:07:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:07:44,369 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:07:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:44,370 INFO L225 Difference]: With dead ends: 1254 [2021-07-09 18:07:44,370 INFO L226 Difference]: Without dead ends: 1240 [2021-07-09 18:07:44,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1178.5ms TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:07:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-07-09 18:07:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 653. [2021-07-09 18:07:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.1165644171779143) internal successors, (1380), 652 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1380 transitions. [2021-07-09 18:07:44,377 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1380 transitions. Word has length 41 [2021-07-09 18:07:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:44,377 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1380 transitions. [2021-07-09 18:07:44,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1380 transitions. [2021-07-09 18:07:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:07:44,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:44,378 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:44,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:44,579 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2073348345, now seen corresponding path program 131 times [2021-07-09 18:07:44,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:44,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568544557] [2021-07-09 18:07:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:44,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:44,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568544557] [2021-07-09 18:07:44,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568544557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:44,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098376887] [2021-07-09 18:07:44,867 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:44,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:07:44,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:44,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-09 18:07:44,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:45,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098376887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:45,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:45,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2021-07-09 18:07:45,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867763772] [2021-07-09 18:07:45,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:07:45,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:45,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:07:45,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:07:45,420 INFO L87 Difference]: Start difference. First operand 653 states and 1380 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:55,154 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-07-09 18:07:55,765 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-07-09 18:07:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:57,020 INFO L93 Difference]: Finished difference Result 2177 states and 4455 transitions. [2021-07-09 18:07:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-07-09 18:07:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:07:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:57,023 INFO L225 Difference]: With dead ends: 2177 [2021-07-09 18:07:57,023 INFO L226 Difference]: Without dead ends: 2151 [2021-07-09 18:07:57,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17707 ImplicationChecksByTransitivity, 10228.0ms TimeCoverageRelationStatistics Valid=4996, Invalid=38894, Unknown=0, NotChecked=0, Total=43890 [2021-07-09 18:07:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-07-09 18:07:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 701. [2021-07-09 18:07:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.1085714285714285) internal successors, (1476), 700 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1476 transitions. [2021-07-09 18:07:57,035 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1476 transitions. Word has length 41 [2021-07-09 18:07:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:57,035 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 1476 transitions. [2021-07-09 18:07:57,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:57,035 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1476 transitions. [2021-07-09 18:07:57,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:07:57,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:57,036 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:57,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-07-09 18:07:57,236 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 132 times [2021-07-09 18:07:57,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:57,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935778406] [2021-07-09 18:07:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:57,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:57,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935778406] [2021-07-09 18:07:57,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935778406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:57,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516060028] [2021-07-09 18:07:57,527 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:57,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:07:57,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:57,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-09 18:07:57,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:58,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516060028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:58,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:58,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:07:58,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011075178] [2021-07-09 18:07:58,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:07:58,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:58,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:07:58,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:07:58,196 INFO L87 Difference]: Start difference. First operand 701 states and 1476 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:00,782 INFO L93 Difference]: Finished difference Result 1425 states and 2940 transitions. [2021-07-09 18:08:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:08:00,782 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:00,784 INFO L225 Difference]: With dead ends: 1425 [2021-07-09 18:08:00,784 INFO L226 Difference]: Without dead ends: 1352 [2021-07-09 18:08:00,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 2683.4ms TimeCoverageRelationStatistics Valid=1356, Invalid=9564, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 18:08:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-07-09 18:08:00,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 879. [2021-07-09 18:08:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.1890660592255125) internal successors, (1922), 878 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1922 transitions. [2021-07-09 18:08:00,798 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1922 transitions. Word has length 43 [2021-07-09 18:08:00,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:00,798 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 1922 transitions. [2021-07-09 18:08:00,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1922 transitions. [2021-07-09 18:08:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:00,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:00,800 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:01,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-07-09 18:08:01,013 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1027861339, now seen corresponding path program 133 times [2021-07-09 18:08:01,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:01,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309560398] [2021-07-09 18:08:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:01,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:01,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309560398] [2021-07-09 18:08:01,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309560398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:01,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177276673] [2021-07-09 18:08:01,325 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:01,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:01,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:01,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177276673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:01,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:01,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:01,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638006938] [2021-07-09 18:08:01,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:01,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:01,833 INFO L87 Difference]: Start difference. First operand 879 states and 1922 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:04,182 INFO L93 Difference]: Finished difference Result 1463 states and 3003 transitions. [2021-07-09 18:08:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:08:04,183 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:04,184 INFO L225 Difference]: With dead ends: 1463 [2021-07-09 18:08:04,184 INFO L226 Difference]: Without dead ends: 1401 [2021-07-09 18:08:04,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 2419.9ms TimeCoverageRelationStatistics Valid=1457, Invalid=10533, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:08:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-07-09 18:08:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 881. [2021-07-09 18:08:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1886363636363635) internal successors, (1926), 880 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1926 transitions. [2021-07-09 18:08:04,195 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1926 transitions. Word has length 43 [2021-07-09 18:08:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:04,195 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1926 transitions. [2021-07-09 18:08:04,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1926 transitions. [2021-07-09 18:08:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:04,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:04,196 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:04,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-07-09 18:08:04,396 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -475713121, now seen corresponding path program 134 times [2021-07-09 18:08:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:04,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225307596] [2021-07-09 18:08:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:04,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:04,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225307596] [2021-07-09 18:08:04,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225307596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:04,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25210446] [2021-07-09 18:08:04,685 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:04,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:04,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:04,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:05,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25210446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:05,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:05,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:05,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842048949] [2021-07-09 18:08:05,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:05,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:05,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:05,193 INFO L87 Difference]: Start difference. First operand 881 states and 1926 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:07,860 INFO L93 Difference]: Finished difference Result 1461 states and 3001 transitions. [2021-07-09 18:08:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-09 18:08:07,860 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:07,862 INFO L225 Difference]: With dead ends: 1461 [2021-07-09 18:08:07,862 INFO L226 Difference]: Without dead ends: 1405 [2021-07-09 18:08:07,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2512.5ms TimeCoverageRelationStatistics Valid=1554, Invalid=11556, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 18:08:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-07-09 18:08:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 883. [2021-07-09 18:08:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 2.188208616780045) internal successors, (1930), 882 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1930 transitions. [2021-07-09 18:08:07,873 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1930 transitions. Word has length 43 [2021-07-09 18:08:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:07,873 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 1930 transitions. [2021-07-09 18:08:07,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1930 transitions. [2021-07-09 18:08:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:07,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:07,874 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:08,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-07-09 18:08:08,075 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:08,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:08,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1667971299, now seen corresponding path program 135 times [2021-07-09 18:08:08,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:08,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539127468] [2021-07-09 18:08:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:08,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:08,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539127468] [2021-07-09 18:08:08,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539127468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:08,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606792472] [2021-07-09 18:08:08,374 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:08,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:08:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:08,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:08,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:08,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606792472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:08,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:08,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:08,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30288373] [2021-07-09 18:08:08,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:08,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:08,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:08,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:08,898 INFO L87 Difference]: Start difference. First operand 883 states and 1930 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:11,648 INFO L93 Difference]: Finished difference Result 1459 states and 2999 transitions. [2021-07-09 18:08:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-09 18:08:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:11,650 INFO L225 Difference]: With dead ends: 1459 [2021-07-09 18:08:11,650 INFO L226 Difference]: Without dead ends: 1409 [2021-07-09 18:08:11,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 2651.6ms TimeCoverageRelationStatistics Valid=1676, Invalid=12604, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:08:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-07-09 18:08:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 885. [2021-07-09 18:08:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.1877828054298645) internal successors, (1934), 884 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1934 transitions. [2021-07-09 18:08:11,660 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1934 transitions. Word has length 43 [2021-07-09 18:08:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:11,660 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1934 transitions. [2021-07-09 18:08:11,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1934 transitions. [2021-07-09 18:08:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:11,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:11,661 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:11,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-09 18:08:11,861 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:11,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1596833497, now seen corresponding path program 136 times [2021-07-09 18:08:11,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:11,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659388863] [2021-07-09 18:08:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:12,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659388863] [2021-07-09 18:08:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659388863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090181608] [2021-07-09 18:08:12,143 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:12,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:12,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:12,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:12,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:12,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090181608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:12,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:12,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:12,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961363399] [2021-07-09 18:08:12,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:12,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:12,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:12,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:12,647 INFO L87 Difference]: Start difference. First operand 885 states and 1934 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:15,654 INFO L93 Difference]: Finished difference Result 1457 states and 2997 transitions. [2021-07-09 18:08:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 18:08:15,654 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:15,656 INFO L225 Difference]: With dead ends: 1457 [2021-07-09 18:08:15,656 INFO L226 Difference]: Without dead ends: 1413 [2021-07-09 18:08:15,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 2731.7ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 18:08:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-07-09 18:08:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 887. [2021-07-09 18:08:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.1873589164785554) internal successors, (1938), 886 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1938 transitions. [2021-07-09 18:08:15,667 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1938 transitions. Word has length 43 [2021-07-09 18:08:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:15,667 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 1938 transitions. [2021-07-09 18:08:15,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1938 transitions. [2021-07-09 18:08:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:15,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:15,668 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:15,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-07-09 18:08:15,869 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:15,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:15,869 INFO L82 PathProgramCache]: Analyzing trace with hash -500790677, now seen corresponding path program 137 times [2021-07-09 18:08:15,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:15,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909608432] [2021-07-09 18:08:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:16,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:16,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909608432] [2021-07-09 18:08:16,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909608432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:16,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177877895] [2021-07-09 18:08:16,173 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:16,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:08:16,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:16,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:16,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177877895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:16,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:16,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:16,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763523309] [2021-07-09 18:08:16,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:16,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:16,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:16,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:16,678 INFO L87 Difference]: Start difference. First operand 887 states and 1938 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:19,912 INFO L93 Difference]: Finished difference Result 1457 states and 2999 transitions. [2021-07-09 18:08:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 18:08:19,913 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:19,914 INFO L225 Difference]: With dead ends: 1457 [2021-07-09 18:08:19,914 INFO L226 Difference]: Without dead ends: 1419 [2021-07-09 18:08:19,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5238 ImplicationChecksByTransitivity, 2888.1ms TimeCoverageRelationStatistics Valid=1995, Invalid=14775, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:08:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-07-09 18:08:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 889. [2021-07-09 18:08:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.186936936936937) internal successors, (1942), 888 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1942 transitions. [2021-07-09 18:08:19,929 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1942 transitions. Word has length 43 [2021-07-09 18:08:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:19,929 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 1942 transitions. [2021-07-09 18:08:19,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1942 transitions. [2021-07-09 18:08:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:19,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:19,930 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:20,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-07-09 18:08:20,145 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 331633839, now seen corresponding path program 138 times [2021-07-09 18:08:20,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:20,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664852236] [2021-07-09 18:08:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:20,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:20,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664852236] [2021-07-09 18:08:20,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664852236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:20,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308631272] [2021-07-09 18:08:20,467 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:20,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:08:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:20,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:21,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308631272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:21,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:21,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:21,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891511181] [2021-07-09 18:08:21,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:21,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:21,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:21,057 INFO L87 Difference]: Start difference. First operand 889 states and 1942 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:24,715 INFO L93 Difference]: Finished difference Result 1520 states and 3112 transitions. [2021-07-09 18:08:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-09 18:08:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:24,717 INFO L225 Difference]: With dead ends: 1520 [2021-07-09 18:08:24,717 INFO L226 Difference]: Without dead ends: 1475 [2021-07-09 18:08:24,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 3278.8ms TimeCoverageRelationStatistics Valid=2173, Invalid=15649, Unknown=0, NotChecked=0, Total=17822 [2021-07-09 18:08:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-07-09 18:08:24,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 892. [2021-07-09 18:08:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.1885521885521886) internal successors, (1950), 891 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1950 transitions. [2021-07-09 18:08:24,730 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1950 transitions. Word has length 43 [2021-07-09 18:08:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:24,730 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 1950 transitions. [2021-07-09 18:08:24,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:24,730 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1950 transitions. [2021-07-09 18:08:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:24,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:24,731 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:24,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-07-09 18:08:24,931 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:24,932 INFO L82 PathProgramCache]: Analyzing trace with hash -933294021, now seen corresponding path program 139 times [2021-07-09 18:08:24,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:24,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443593728] [2021-07-09 18:08:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:25,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443593728] [2021-07-09 18:08:25,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443593728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141137929] [2021-07-09 18:08:25,260 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:25,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:25,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141137929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:25,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:25,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:25,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081323263] [2021-07-09 18:08:25,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:25,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:25,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:25,834 INFO L87 Difference]: Start difference. First operand 892 states and 1950 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:28,907 INFO L93 Difference]: Finished difference Result 1310 states and 2689 transitions. [2021-07-09 18:08:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:08:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:28,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:28,909 INFO L225 Difference]: With dead ends: 1310 [2021-07-09 18:08:28,909 INFO L226 Difference]: Without dead ends: 1290 [2021-07-09 18:08:28,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4570 ImplicationChecksByTransitivity, 2974.5ms TimeCoverageRelationStatistics Valid=1991, Invalid=13015, Unknown=0, NotChecked=0, Total=15006 [2021-07-09 18:08:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-07-09 18:08:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 893. [2021-07-09 18:08:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.188340807174888) internal successors, (1952), 892 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1952 transitions. [2021-07-09 18:08:28,919 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1952 transitions. Word has length 43 [2021-07-09 18:08:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:28,919 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 1952 transitions. [2021-07-09 18:08:28,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1952 transitions. [2021-07-09 18:08:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:28,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:28,920 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:29,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-09 18:08:29,121 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1154201253, now seen corresponding path program 140 times [2021-07-09 18:08:29,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:29,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094824926] [2021-07-09 18:08:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:29,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:29,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094824926] [2021-07-09 18:08:29,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094824926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:29,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386393216] [2021-07-09 18:08:29,406 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:29,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:29,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:29,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:29,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386393216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:29,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:29,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:29,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083814989] [2021-07-09 18:08:29,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:29,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:29,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:29,920 INFO L87 Difference]: Start difference. First operand 893 states and 1952 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:32,388 INFO L93 Difference]: Finished difference Result 1424 states and 2924 transitions. [2021-07-09 18:08:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:08:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:32,390 INFO L225 Difference]: With dead ends: 1424 [2021-07-09 18:08:32,390 INFO L226 Difference]: Without dead ends: 1368 [2021-07-09 18:08:32,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2360.8ms TimeCoverageRelationStatistics Valid=1364, Invalid=10626, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 18:08:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-07-09 18:08:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 899. [2021-07-09 18:08:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.1870824053452114) internal successors, (1964), 898 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1964 transitions. [2021-07-09 18:08:32,400 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1964 transitions. Word has length 43 [2021-07-09 18:08:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:32,400 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 1964 transitions. [2021-07-09 18:08:32,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1964 transitions. [2021-07-09 18:08:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:32,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:32,401 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:32,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:32,601 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash -997081623, now seen corresponding path program 141 times [2021-07-09 18:08:32,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:32,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989001053] [2021-07-09 18:08:32,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:32,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:32,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989001053] [2021-07-09 18:08:32,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989001053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:32,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319825334] [2021-07-09 18:08:32,899 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:32,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:08:32,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:32,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:33,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319825334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:33,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:33,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:33,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834956779] [2021-07-09 18:08:33,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:33,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:33,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:33,415 INFO L87 Difference]: Start difference. First operand 899 states and 1964 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:35,975 INFO L93 Difference]: Finished difference Result 1429 states and 2948 transitions. [2021-07-09 18:08:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 18:08:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:35,977 INFO L225 Difference]: With dead ends: 1429 [2021-07-09 18:08:35,977 INFO L226 Difference]: Without dead ends: 1379 [2021-07-09 18:08:35,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4011 ImplicationChecksByTransitivity, 2486.9ms TimeCoverageRelationStatistics Valid=1495, Invalid=11615, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 18:08:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-07-09 18:08:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 909. [2021-07-09 18:08:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.193832599118943) internal successors, (1992), 908 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1992 transitions. [2021-07-09 18:08:35,991 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1992 transitions. Word has length 43 [2021-07-09 18:08:35,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:35,991 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 1992 transitions. [2021-07-09 18:08:35,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:35,991 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1992 transitions. [2021-07-09 18:08:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:35,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:35,993 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:36,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:36,215 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:36,216 INFO L82 PathProgramCache]: Analyzing trace with hash 33080877, now seen corresponding path program 142 times [2021-07-09 18:08:36,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:36,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61993515] [2021-07-09 18:08:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:36,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61993515] [2021-07-09 18:08:36,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61993515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:36,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840656432] [2021-07-09 18:08:36,500 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:36,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:36,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:36,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:36,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:37,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840656432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:37,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:37,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:37,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347524834] [2021-07-09 18:08:37,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:37,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:37,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:37,009 INFO L87 Difference]: Start difference. First operand 909 states and 1992 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:39,803 INFO L93 Difference]: Finished difference Result 1441 states and 2986 transitions. [2021-07-09 18:08:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:08:39,804 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:39,805 INFO L225 Difference]: With dead ends: 1441 [2021-07-09 18:08:39,805 INFO L226 Difference]: Without dead ends: 1397 [2021-07-09 18:08:39,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 2586.0ms TimeCoverageRelationStatistics Valid=1642, Invalid=12638, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:08:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-07-09 18:08:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 919. [2021-07-09 18:08:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.2004357298474946) internal successors, (2020), 918 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2020 transitions. [2021-07-09 18:08:39,816 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2020 transitions. Word has length 43 [2021-07-09 18:08:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:39,816 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2020 transitions. [2021-07-09 18:08:39,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2020 transitions. [2021-07-09 18:08:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:39,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:39,817 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:40,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-07-09 18:08:40,018 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1129123697, now seen corresponding path program 143 times [2021-07-09 18:08:40,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:40,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914834203] [2021-07-09 18:08:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:40,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914834203] [2021-07-09 18:08:40,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914834203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:40,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852160518] [2021-07-09 18:08:40,343 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:40,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:08:40,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:40,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:40,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:40,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852160518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:40,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:40,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:40,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138770417] [2021-07-09 18:08:40,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:40,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:40,856 INFO L87 Difference]: Start difference. First operand 919 states and 2020 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:43,797 INFO L93 Difference]: Finished difference Result 1453 states and 3024 transitions. [2021-07-09 18:08:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:08:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:43,799 INFO L225 Difference]: With dead ends: 1453 [2021-07-09 18:08:43,799 INFO L226 Difference]: Without dead ends: 1415 [2021-07-09 18:08:43,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4823 ImplicationChecksByTransitivity, 2778.3ms TimeCoverageRelationStatistics Valid=1814, Invalid=13686, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 18:08:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-07-09 18:08:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 929. [2021-07-09 18:08:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.206896551724138) internal successors, (2048), 928 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2048 transitions. [2021-07-09 18:08:43,810 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2048 transitions. Word has length 43 [2021-07-09 18:08:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:43,810 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2048 transitions. [2021-07-09 18:08:43,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2048 transitions. [2021-07-09 18:08:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:43,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:43,811 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:44,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:44,013 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1961548213, now seen corresponding path program 144 times [2021-07-09 18:08:44,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:44,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979735546] [2021-07-09 18:08:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:44,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:44,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979735546] [2021-07-09 18:08:44,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979735546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:44,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649948315] [2021-07-09 18:08:44,332 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:44,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:08:44,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:44,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:44,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649948315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:44,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:44,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:44,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836240038] [2021-07-09 18:08:44,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:44,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:44,846 INFO L87 Difference]: Start difference. First operand 929 states and 2048 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:48,176 INFO L93 Difference]: Finished difference Result 1551 states and 3204 transitions. [2021-07-09 18:08:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-09 18:08:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:48,178 INFO L225 Difference]: With dead ends: 1551 [2021-07-09 18:08:48,178 INFO L226 Difference]: Without dead ends: 1506 [2021-07-09 18:08:48,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 3049.9ms TimeCoverageRelationStatistics Valid=1995, Invalid=14517, Unknown=0, NotChecked=0, Total=16512 [2021-07-09 18:08:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-07-09 18:08:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 933. [2021-07-09 18:08:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.209227467811159) internal successors, (2059), 932 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2059 transitions. [2021-07-09 18:08:48,189 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2059 transitions. Word has length 43 [2021-07-09 18:08:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:48,189 INFO L482 AbstractCegarLoop]: Abstraction has 933 states and 2059 transitions. [2021-07-09 18:08:48,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2059 transitions. [2021-07-09 18:08:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:48,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:48,190 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:48,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-09 18:08:48,390 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 696620353, now seen corresponding path program 145 times [2021-07-09 18:08:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:48,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152340005] [2021-07-09 18:08:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:48,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:48,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152340005] [2021-07-09 18:08:48,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152340005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:48,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783046205] [2021-07-09 18:08:48,709 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:48,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:48,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:49,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783046205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:49,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:49,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:49,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815107866] [2021-07-09 18:08:49,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:49,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:49,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:49,231 INFO L87 Difference]: Start difference. First operand 933 states and 2059 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:52,279 INFO L93 Difference]: Finished difference Result 1369 states and 2846 transitions. [2021-07-09 18:08:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:08:52,279 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:52,281 INFO L225 Difference]: With dead ends: 1369 [2021-07-09 18:08:52,281 INFO L226 Difference]: Without dead ends: 1342 [2021-07-09 18:08:52,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 2881.9ms TimeCoverageRelationStatistics Valid=1899, Invalid=12381, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:08:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-07-09 18:08:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 901. [2021-07-09 18:08:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.1933333333333334) internal successors, (1974), 900 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1974 transitions. [2021-07-09 18:08:52,291 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1974 transitions. Word has length 43 [2021-07-09 18:08:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:52,291 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 1974 transitions. [2021-07-09 18:08:52,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1974 transitions. [2021-07-09 18:08:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:52,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:52,292 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:52,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-07-09 18:08:52,492 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1503474267, now seen corresponding path program 146 times [2021-07-09 18:08:52,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:52,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717091396] [2021-07-09 18:08:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:52,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:52,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717091396] [2021-07-09 18:08:52,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717091396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:52,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067144209] [2021-07-09 18:08:52,744 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:52,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:52,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:52,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:52,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:53,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067144209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:53,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:53,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441720970] [2021-07-09 18:08:53,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:53,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:53,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:53,257 INFO L87 Difference]: Start difference. First operand 901 states and 1974 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:55,816 INFO L93 Difference]: Finished difference Result 1397 states and 2882 transitions. [2021-07-09 18:08:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 18:08:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:55,818 INFO L225 Difference]: With dead ends: 1397 [2021-07-09 18:08:55,818 INFO L226 Difference]: Without dead ends: 1347 [2021-07-09 18:08:55,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4136 ImplicationChecksByTransitivity, 2438.4ms TimeCoverageRelationStatistics Valid=1473, Invalid=11867, Unknown=0, NotChecked=0, Total=13340 [2021-07-09 18:08:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-07-09 18:08:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 905. [2021-07-09 18:08:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1924778761061945) internal successors, (1982), 904 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1982 transitions. [2021-07-09 18:08:55,828 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1982 transitions. Word has length 43 [2021-07-09 18:08:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:55,828 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1982 transitions. [2021-07-09 18:08:55,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1982 transitions. [2021-07-09 18:08:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:55,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:55,829 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:56,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-09 18:08:56,029 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:56,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:56,030 INFO L82 PathProgramCache]: Analyzing trace with hash -473311767, now seen corresponding path program 147 times [2021-07-09 18:08:56,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:56,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334079053] [2021-07-09 18:08:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:56,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:56,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334079053] [2021-07-09 18:08:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334079053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:56,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038330737] [2021-07-09 18:08:56,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:56,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:08:56,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:56,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:08:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:56,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038330737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:56,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:56,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:08:56,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823128712] [2021-07-09 18:08:56,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:56,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:56,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:56,867 INFO L87 Difference]: Start difference. First operand 905 states and 1982 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:59,570 INFO L93 Difference]: Finished difference Result 1410 states and 2922 transitions. [2021-07-09 18:08:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:08:59,570 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:08:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:59,571 INFO L225 Difference]: With dead ends: 1410 [2021-07-09 18:08:59,571 INFO L226 Difference]: Without dead ends: 1366 [2021-07-09 18:08:59,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4542 ImplicationChecksByTransitivity, 2659.5ms TimeCoverageRelationStatistics Valid=1643, Invalid=12877, Unknown=0, NotChecked=0, Total=14520 [2021-07-09 18:08:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-07-09 18:08:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 915. [2021-07-09 18:08:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.199124726477024) internal successors, (2010), 914 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2010 transitions. [2021-07-09 18:08:59,583 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2010 transitions. Word has length 43 [2021-07-09 18:08:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:59,583 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2010 transitions. [2021-07-09 18:08:59,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2010 transitions. [2021-07-09 18:08:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:08:59,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:59,584 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:59,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-07-09 18:08:59,785 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash 622731053, now seen corresponding path program 148 times [2021-07-09 18:08:59,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:59,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35099448] [2021-07-09 18:08:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:00,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:00,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35099448] [2021-07-09 18:09:00,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35099448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:00,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154013250] [2021-07-09 18:09:00,068 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:00,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:00,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:00,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154013250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:00,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:00,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:00,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567633511] [2021-07-09 18:09:00,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:00,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:00,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:00,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:00,579 INFO L87 Difference]: Start difference. First operand 915 states and 2010 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:03,572 INFO L93 Difference]: Finished difference Result 1428 states and 2972 transitions. [2021-07-09 18:09:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:09:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:03,574 INFO L225 Difference]: With dead ends: 1428 [2021-07-09 18:09:03,574 INFO L226 Difference]: Without dead ends: 1390 [2021-07-09 18:09:03,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4957 ImplicationChecksByTransitivity, 2773.0ms TimeCoverageRelationStatistics Valid=1824, Invalid=13926, Unknown=0, NotChecked=0, Total=15750 [2021-07-09 18:09:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-07-09 18:09:03,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 925. [2021-07-09 18:09:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.205627705627706) internal successors, (2038), 924 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2038 transitions. [2021-07-09 18:09:03,585 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2038 transitions. Word has length 43 [2021-07-09 18:09:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:03,585 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2038 transitions. [2021-07-09 18:09:03,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2038 transitions. [2021-07-09 18:09:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:03,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:03,586 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:03,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-07-09 18:09:03,786 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:03,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1455155569, now seen corresponding path program 149 times [2021-07-09 18:09:03,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:03,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75286468] [2021-07-09 18:09:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:04,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:04,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75286468] [2021-07-09 18:09:04,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75286468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:04,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266676389] [2021-07-09 18:09:04,110 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:04,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:09:04,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:04,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:04,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266676389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:04,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:04,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:04,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354587547] [2021-07-09 18:09:04,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:04,633 INFO L87 Difference]: Start difference. First operand 925 states and 2038 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:07,936 INFO L93 Difference]: Finished difference Result 1532 states and 3164 transitions. [2021-07-09 18:09:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-09 18:09:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:07,938 INFO L225 Difference]: With dead ends: 1532 [2021-07-09 18:09:07,938 INFO L226 Difference]: Without dead ends: 1487 [2021-07-09 18:09:07,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 3105.7ms TimeCoverageRelationStatistics Valid=2014, Invalid=14756, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:09:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-07-09 18:09:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 929. [2021-07-09 18:09:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.2079741379310347) internal successors, (2049), 928 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2049 transitions. [2021-07-09 18:09:07,949 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2049 transitions. Word has length 43 [2021-07-09 18:09:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:07,949 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2049 transitions. [2021-07-09 18:09:07,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2049 transitions. [2021-07-09 18:09:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:07,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:07,950 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:08,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-07-09 18:09:08,150 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash 190227709, now seen corresponding path program 150 times [2021-07-09 18:09:08,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:08,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743720441] [2021-07-09 18:09:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:08,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:08,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743720441] [2021-07-09 18:09:08,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743720441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:08,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632559353] [2021-07-09 18:09:08,469 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:08,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:09:08,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:08,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-09 18:09:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:09,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632559353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:09,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:09,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:09,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418040629] [2021-07-09 18:09:09,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:09,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:09,059 INFO L87 Difference]: Start difference. First operand 929 states and 2049 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:12,162 INFO L93 Difference]: Finished difference Result 1359 states and 2823 transitions. [2021-07-09 18:09:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:09:12,162 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:12,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:12,164 INFO L225 Difference]: With dead ends: 1359 [2021-07-09 18:09:12,164 INFO L226 Difference]: Without dead ends: 1332 [2021-07-09 18:09:12,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 3098.7ms TimeCoverageRelationStatistics Valid=1914, Invalid=12606, Unknown=0, NotChecked=0, Total=14520 [2021-07-09 18:09:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-07-09 18:09:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 881. [2021-07-09 18:09:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1818181818181817) internal successors, (1920), 880 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1920 transitions. [2021-07-09 18:09:12,174 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1920 transitions. Word has length 43 [2021-07-09 18:09:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:12,174 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1920 transitions. [2021-07-09 18:09:12,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1920 transitions. [2021-07-09 18:09:12,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:12,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:12,175 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:12,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-07-09 18:09:12,376 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash -523000667, now seen corresponding path program 151 times [2021-07-09 18:09:12,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:12,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263429954] [2021-07-09 18:09:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:12,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:12,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263429954] [2021-07-09 18:09:12,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263429954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:12,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390681799] [2021-07-09 18:09:12,662 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:12,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:13,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390681799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:13,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:13,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:13,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405267893] [2021-07-09 18:09:13,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:13,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:13,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:13,203 INFO L87 Difference]: Start difference. First operand 881 states and 1920 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:16,059 INFO L93 Difference]: Finished difference Result 1312 states and 2692 transitions. [2021-07-09 18:09:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:09:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:16,061 INFO L225 Difference]: With dead ends: 1312 [2021-07-09 18:09:16,061 INFO L226 Difference]: Without dead ends: 1268 [2021-07-09 18:09:16,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4670 ImplicationChecksByTransitivity, 2688.4ms TimeCoverageRelationStatistics Valid=1619, Invalid=13143, Unknown=0, NotChecked=0, Total=14762 [2021-07-09 18:09:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-07-09 18:09:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 885. [2021-07-09 18:09:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.180995475113122) internal successors, (1928), 884 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1928 transitions. [2021-07-09 18:09:16,070 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1928 transitions. Word has length 43 [2021-07-09 18:09:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:16,070 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1928 transitions. [2021-07-09 18:09:16,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1928 transitions. [2021-07-09 18:09:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:16,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:16,071 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:16,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-07-09 18:09:16,272 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash 573042153, now seen corresponding path program 152 times [2021-07-09 18:09:16,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:16,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945425474] [2021-07-09 18:09:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:16,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:16,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945425474] [2021-07-09 18:09:16,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945425474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:16,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84201851] [2021-07-09 18:09:16,555 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:16,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:16,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:17,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84201851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:17,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:17,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:17,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492477986] [2021-07-09 18:09:17,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:17,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:17,072 INFO L87 Difference]: Start difference. First operand 885 states and 1928 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:20,147 INFO L93 Difference]: Finished difference Result 1325 states and 2728 transitions. [2021-07-09 18:09:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:09:20,148 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:20,149 INFO L225 Difference]: With dead ends: 1325 [2021-07-09 18:09:20,149 INFO L226 Difference]: Without dead ends: 1287 [2021-07-09 18:09:20,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 2817.9ms TimeCoverageRelationStatistics Valid=1818, Invalid=14184, Unknown=0, NotChecked=0, Total=16002 [2021-07-09 18:09:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-09 18:09:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 891. [2021-07-09 18:09:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.1842696629213485) internal successors, (1944), 890 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1944 transitions. [2021-07-09 18:09:20,161 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1944 transitions. Word has length 43 [2021-07-09 18:09:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:20,161 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 1944 transitions. [2021-07-09 18:09:20,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1944 transitions. [2021-07-09 18:09:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:20,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:20,162 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:20,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-07-09 18:09:20,377 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1405466669, now seen corresponding path program 153 times [2021-07-09 18:09:20,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:20,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598462492] [2021-07-09 18:09:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:20,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:20,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598462492] [2021-07-09 18:09:20,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598462492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:20,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938482679] [2021-07-09 18:09:20,796 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:20,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:09:20,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:20,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:20,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:21,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938482679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:21,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:21,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:21,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384071370] [2021-07-09 18:09:21,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:21,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:21,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:21,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:21,338 INFO L87 Difference]: Start difference. First operand 891 states and 1944 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:24,670 INFO L93 Difference]: Finished difference Result 1435 states and 2932 transitions. [2021-07-09 18:09:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-09 18:09:24,671 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:24,672 INFO L225 Difference]: With dead ends: 1435 [2021-07-09 18:09:24,672 INFO L226 Difference]: Without dead ends: 1390 [2021-07-09 18:09:24,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5395 ImplicationChecksByTransitivity, 3239.9ms TimeCoverageRelationStatistics Valid=2017, Invalid=15013, Unknown=0, NotChecked=0, Total=17030 [2021-07-09 18:09:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-07-09 18:09:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 895. [2021-07-09 18:09:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.1868008948545863) internal successors, (1955), 894 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1955 transitions. [2021-07-09 18:09:24,683 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1955 transitions. Word has length 43 [2021-07-09 18:09:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:24,683 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 1955 transitions. [2021-07-09 18:09:24,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1955 transitions. [2021-07-09 18:09:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:24,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:24,684 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:24,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-07-09 18:09:24,884 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash 140538809, now seen corresponding path program 154 times [2021-07-09 18:09:24,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:24,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302557356] [2021-07-09 18:09:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:25,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:25,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302557356] [2021-07-09 18:09:25,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302557356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:25,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900706807] [2021-07-09 18:09:25,207 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:25,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:25,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:25,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:25,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:25,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900706807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:25,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:25,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:25,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403351583] [2021-07-09 18:09:25,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:25,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:25,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:25,746 INFO L87 Difference]: Start difference. First operand 895 states and 1955 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:28,799 INFO L93 Difference]: Finished difference Result 1303 states and 2684 transitions. [2021-07-09 18:09:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:09:28,800 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:28,801 INFO L225 Difference]: With dead ends: 1303 [2021-07-09 18:09:28,801 INFO L226 Difference]: Without dead ends: 1276 [2021-07-09 18:09:28,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4606 ImplicationChecksByTransitivity, 2956.1ms TimeCoverageRelationStatistics Valid=1928, Invalid=12834, Unknown=0, NotChecked=0, Total=14762 [2021-07-09 18:09:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-09 18:09:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 643. [2021-07-09 18:09:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.115264797507788) internal successors, (1358), 642 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:28,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1358 transitions. [2021-07-09 18:09:28,809 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1358 transitions. Word has length 43 [2021-07-09 18:09:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:28,809 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1358 transitions. [2021-07-09 18:09:28,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1358 transitions. [2021-07-09 18:09:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:28,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:28,810 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:29,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-07-09 18:09:29,010 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:29,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:29,010 INFO L82 PathProgramCache]: Analyzing trace with hash -544326747, now seen corresponding path program 155 times [2021-07-09 18:09:29,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:29,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517071763] [2021-07-09 18:09:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:29,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:29,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517071763] [2021-07-09 18:09:29,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517071763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:29,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572899544] [2021-07-09 18:09:29,299 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:29,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:09:29,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:29,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:29,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:29,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572899544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:29,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:29,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:29,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626035597] [2021-07-09 18:09:29,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:29,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:29,824 INFO L87 Difference]: Start difference. First operand 643 states and 1358 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:32,793 INFO L93 Difference]: Finished difference Result 1011 states and 2000 transitions. [2021-07-09 18:09:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:09:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:32,794 INFO L225 Difference]: With dead ends: 1011 [2021-07-09 18:09:32,794 INFO L226 Difference]: Without dead ends: 973 [2021-07-09 18:09:32,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 2827.2ms TimeCoverageRelationStatistics Valid=1787, Invalid=14469, Unknown=0, NotChecked=0, Total=16256 [2021-07-09 18:09:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-07-09 18:09:32,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 647. [2021-07-09 18:09:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.1145510835913313) internal successors, (1366), 646 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1366 transitions. [2021-07-09 18:09:32,801 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1366 transitions. Word has length 43 [2021-07-09 18:09:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:32,801 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1366 transitions. [2021-07-09 18:09:32,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1366 transitions. [2021-07-09 18:09:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:32,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:32,801 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:33,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:33,002 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash 288097769, now seen corresponding path program 156 times [2021-07-09 18:09:33,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:33,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729204087] [2021-07-09 18:09:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:33,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:33,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729204087] [2021-07-09 18:09:33,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729204087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:33,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942455379] [2021-07-09 18:09:33,318 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:33,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:09:33,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:33,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:33,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:33,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942455379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:33,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:33,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:33,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047524726] [2021-07-09 18:09:33,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:33,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:33,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:33,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:33,838 INFO L87 Difference]: Start difference. First operand 647 states and 1366 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:37,157 INFO L93 Difference]: Finished difference Result 1112 states and 2182 transitions. [2021-07-09 18:09:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-09 18:09:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:37,158 INFO L225 Difference]: With dead ends: 1112 [2021-07-09 18:09:37,158 INFO L226 Difference]: Without dead ends: 1067 [2021-07-09 18:09:37,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 3114.7ms TimeCoverageRelationStatistics Valid=2004, Invalid=15288, Unknown=0, NotChecked=0, Total=17292 [2021-07-09 18:09:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-09 18:09:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 649. [2021-07-09 18:09:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.115740740740741) internal successors, (1371), 648 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1371 transitions. [2021-07-09 18:09:37,165 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1371 transitions. Word has length 43 [2021-07-09 18:09:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:37,165 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1371 transitions. [2021-07-09 18:09:37,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1371 transitions. [2021-07-09 18:09:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:37,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:37,166 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:37,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-07-09 18:09:37,366 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash -976830091, now seen corresponding path program 157 times [2021-07-09 18:09:37,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:37,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512850701] [2021-07-09 18:09:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:37,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:37,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512850701] [2021-07-09 18:09:37,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512850701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:37,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16669083] [2021-07-09 18:09:37,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:37,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:37,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:38,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16669083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:38,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:38,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:38,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044724034] [2021-07-09 18:09:38,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:38,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:38,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:38,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:38,204 INFO L87 Difference]: Start difference. First operand 649 states and 1371 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:41,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:41,243 INFO L93 Difference]: Finished difference Result 1006 states and 2001 transitions. [2021-07-09 18:09:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-09 18:09:41,243 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:41,244 INFO L225 Difference]: With dead ends: 1006 [2021-07-09 18:09:41,244 INFO L226 Difference]: Without dead ends: 986 [2021-07-09 18:09:41,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 2949.4ms TimeCoverageRelationStatistics Valid=1906, Invalid=12856, Unknown=0, NotChecked=0, Total=14762 [2021-07-09 18:09:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-07-09 18:09:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 637. [2021-07-09 18:09:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.1037735849056602) internal successors, (1338), 636 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1338 transitions. [2021-07-09 18:09:41,251 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1338 transitions. Word has length 43 [2021-07-09 18:09:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:41,251 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1338 transitions. [2021-07-09 18:09:41,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1338 transitions. [2021-07-09 18:09:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:41,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:41,252 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:41,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-09 18:09:41,453 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1442671963, now seen corresponding path program 158 times [2021-07-09 18:09:41,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:41,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47743445] [2021-07-09 18:09:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:41,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:41,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47743445] [2021-07-09 18:09:41,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47743445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:41,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956073585] [2021-07-09 18:09:41,704 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:41,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:41,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:41,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:41,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:42,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956073585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:42,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:42,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:42,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115528974] [2021-07-09 18:09:42,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:42,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:42,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:42,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:42,220 INFO L87 Difference]: Start difference. First operand 637 states and 1338 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:45,923 INFO L93 Difference]: Finished difference Result 1161 states and 2336 transitions. [2021-07-09 18:09:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-09 18:09:45,923 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:45,924 INFO L225 Difference]: With dead ends: 1161 [2021-07-09 18:09:45,925 INFO L226 Difference]: Without dead ends: 1117 [2021-07-09 18:09:45,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6808 ImplicationChecksByTransitivity, 3579.3ms TimeCoverageRelationStatistics Valid=2323, Invalid=17699, Unknown=0, NotChecked=0, Total=20022 [2021-07-09 18:09:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-07-09 18:09:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 653. [2021-07-09 18:09:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.105828220858896) internal successors, (1373), 652 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1373 transitions. [2021-07-09 18:09:45,932 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1373 transitions. Word has length 43 [2021-07-09 18:09:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:45,932 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1373 transitions. [2021-07-09 18:09:45,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1373 transitions. [2021-07-09 18:09:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:45,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:45,933 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:46,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:46,134 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1587367473, now seen corresponding path program 159 times [2021-07-09 18:09:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:46,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073011173] [2021-07-09 18:09:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:46,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:46,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073011173] [2021-07-09 18:09:46,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073011173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:46,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267674587] [2021-07-09 18:09:46,401 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:46,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:09:46,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:46,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-09 18:09:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:46,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267674587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:46,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:46,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-09 18:09:46,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105310414] [2021-07-09 18:09:46,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:46,981 INFO L87 Difference]: Start difference. First operand 653 states and 1373 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:49,851 INFO L93 Difference]: Finished difference Result 1143 states and 2277 transitions. [2021-07-09 18:09:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-09 18:09:49,852 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:49,853 INFO L225 Difference]: With dead ends: 1143 [2021-07-09 18:09:49,853 INFO L226 Difference]: Without dead ends: 1077 [2021-07-09 18:09:49,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 2784.1ms TimeCoverageRelationStatistics Valid=1808, Invalid=11998, Unknown=0, NotChecked=0, Total=13806 [2021-07-09 18:09:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-07-09 18:09:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 444. [2021-07-09 18:09:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-07-09 18:09:49,859 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 43 [2021-07-09 18:09:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:49,859 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-07-09 18:09:49,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-07-09 18:09:49,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:49,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:49,860 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:50,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:50,060 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash -976438983, now seen corresponding path program 160 times [2021-07-09 18:09:50,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:50,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228217777] [2021-07-09 18:09:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:50,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:50,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228217777] [2021-07-09 18:09:50,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228217777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:50,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725836467] [2021-07-09 18:09:50,384 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:50,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:50,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:50,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:51,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725836467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:51,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:51,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2021-07-09 18:09:51,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980070579] [2021-07-09 18:09:51,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:09:51,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:09:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:09:51,027 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:56,882 INFO L93 Difference]: Finished difference Result 790 states and 1593 transitions. [2021-07-09 18:09:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-09 18:09:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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 43 [2021-07-09 18:09:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:56,883 INFO L225 Difference]: With dead ends: 790 [2021-07-09 18:09:56,883 INFO L226 Difference]: Without dead ends: 764 [2021-07-09 18:09:56,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 5332.1ms TimeCoverageRelationStatistics Valid=1380, Invalid=16442, Unknown=0, NotChecked=0, Total=17822 [2021-07-09 18:09:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-07-09 18:09:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 387. [2021-07-09 18:09:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.0725388601036268) internal successors, (800), 386 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 800 transitions. [2021-07-09 18:09:56,888 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 800 transitions. Word has length 43 [2021-07-09 18:09:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:56,888 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 800 transitions. [2021-07-09 18:09:56,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 800 transitions. [2021-07-09 18:09:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:09:56,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:56,889 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:57,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-07-09 18:09:57,093 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 126220515, now seen corresponding path program 161 times [2021-07-09 18:09:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41973037] [2021-07-09 18:09:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:09:57,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:57,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41973037] [2021-07-09 18:09:57,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41973037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:57,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756217594] [2021-07-09 18:09:57,165 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:57,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:09:57,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:09:57,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756217594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:57,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:57,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 18:09:57,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297156719] [2021-07-09 18:09:57,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:09:57,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:57,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:09:57,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:09:57,265 INFO L87 Difference]: Start difference. First operand 387 states and 800 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-07-09 18:09:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:57,422 INFO L93 Difference]: Finished difference Result 657 states and 1304 transitions. [2021-07-09 18:09:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:09:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 45 [2021-07-09 18:09:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:57,423 INFO L225 Difference]: With dead ends: 657 [2021-07-09 18:09:57,423 INFO L226 Difference]: Without dead ends: 591 [2021-07-09 18:09:57,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:09:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-09 18:09:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 418. [2021-07-09 18:09:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0839328537170263) internal successors, (869), 417 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 869 transitions. [2021-07-09 18:09:57,428 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 869 transitions. Word has length 45 [2021-07-09 18:09:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:57,428 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 869 transitions. [2021-07-09 18:09:57,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-07-09 18:09:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 869 transitions. [2021-07-09 18:09:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:09:57,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:57,428 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:57,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-07-09 18:09:57,629 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:57,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1358919197, now seen corresponding path program 162 times [2021-07-09 18:09:57,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:57,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858977418] [2021-07-09 18:09:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:58,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:58,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858977418] [2021-07-09 18:09:58,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858977418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:58,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267580763] [2021-07-09 18:09:58,092 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:58,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:09:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:58,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-09 18:09:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:58,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267580763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:58,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:58,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-07-09 18:09:58,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481284952] [2021-07-09 18:09:58,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:58,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:58,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:58,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:58,811 INFO L87 Difference]: Start difference. First operand 418 states and 869 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:00,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:00,203 INFO L93 Difference]: Finished difference Result 559 states and 1149 transitions. [2021-07-09 18:10:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:10:00,203 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:10:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:00,208 INFO L225 Difference]: With dead ends: 559 [2021-07-09 18:10:00,208 INFO L226 Difference]: Without dead ends: 543 [2021-07-09 18:10:00,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1457.9ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:10:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-09 18:10:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 435. [2021-07-09 18:10:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.0806451612903225) internal successors, (903), 434 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 903 transitions. [2021-07-09 18:10:00,212 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 903 transitions. Word has length 45 [2021-07-09 18:10:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:00,212 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 903 transitions. [2021-07-09 18:10:00,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 903 transitions. [2021-07-09 18:10:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:10:00,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:00,213 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:00,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-07-09 18:10:00,413 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1371110303, now seen corresponding path program 163 times [2021-07-09 18:10:00,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:00,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859123427] [2021-07-09 18:10:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:10:00,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:00,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859123427] [2021-07-09 18:10:00,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859123427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:00,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345273409] [2021-07-09 18:10:00,731 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:00,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-09 18:10:00,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:01,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345273409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:01,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:01,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-07-09 18:10:01,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706495370] [2021-07-09 18:10:01,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:10:01,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:01,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:10:01,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:10:01,408 INFO L87 Difference]: Start difference. First operand 435 states and 903 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:03,959 INFO L93 Difference]: Finished difference Result 726 states and 1438 transitions. [2021-07-09 18:10:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 18:10:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:10:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:03,960 INFO L225 Difference]: With dead ends: 726 [2021-07-09 18:10:03,960 INFO L226 Difference]: Without dead ends: 655 [2021-07-09 18:10:03,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 2291.1ms TimeCoverageRelationStatistics Valid=626, Invalid=9676, Unknown=0, NotChecked=0, Total=10302 [2021-07-09 18:10:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-09 18:10:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 347. [2021-07-09 18:10:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-07-09 18:10:03,966 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-07-09 18:10:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:03,967 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-07-09 18:10:03,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-07-09 18:10:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:10:03,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:03,967 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:04,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-07-09 18:10:04,181 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash 705869159, now seen corresponding path program 164 times [2021-07-09 18:10:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:04,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294113027] [2021-07-09 18:10:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:04,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:04,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294113027] [2021-07-09 18:10:04,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294113027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:04,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598362375] [2021-07-09 18:10:04,670 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:04,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:04,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:04,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-09 18:10:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:05,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598362375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:05,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:05,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2021-07-09 18:10:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53346652] [2021-07-09 18:10:05,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:10:05,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:05,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:10:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:10:05,505 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:06,772 INFO L93 Difference]: Finished difference Result 477 states and 976 transitions. [2021-07-09 18:10:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:10:06,773 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:10:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:06,773 INFO L225 Difference]: With dead ends: 477 [2021-07-09 18:10:06,773 INFO L226 Difference]: Without dead ends: 461 [2021-07-09 18:10:06,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1484.5ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:10:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-09 18:10:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 347. [2021-07-09 18:10:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-07-09 18:10:06,777 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-07-09 18:10:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:06,777 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-07-09 18:10:06,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-07-09 18:10:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:10:06,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:06,777 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:06,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-09 18:10:06,978 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:06,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1550510357, now seen corresponding path program 165 times [2021-07-09 18:10:06,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:06,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535304754] [2021-07-09 18:10:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:07,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:07,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535304754] [2021-07-09 18:10:07,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535304754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:07,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887859539] [2021-07-09 18:10:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:07,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:10:07,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:07,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-09 18:10:07,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:08,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887859539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:08,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:08,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-07-09 18:10:08,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328386804] [2021-07-09 18:10:08,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:10:08,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:08,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:10:08,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:10:08,192 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:09,574 INFO L93 Difference]: Finished difference Result 491 states and 1004 transitions. [2021-07-09 18:10:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:10:09,575 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:10:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:09,575 INFO L225 Difference]: With dead ends: 491 [2021-07-09 18:10:09,576 INFO L226 Difference]: Without dead ends: 475 [2021-07-09 18:10:09,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1456.9ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:10:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-09 18:10:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 355. [2021-07-09 18:10:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.073446327683616) internal successors, (734), 354 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 734 transitions. [2021-07-09 18:10:09,579 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 734 transitions. Word has length 45 [2021-07-09 18:10:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:09,580 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 734 transitions. [2021-07-09 18:10:09,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 734 transitions. [2021-07-09 18:10:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 18:10:09,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:09,580 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:09,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:09,781 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:09,781 INFO L82 PathProgramCache]: Analyzing trace with hash -972740753, now seen corresponding path program 166 times [2021-07-09 18:10:09,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:09,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578020006] [2021-07-09 18:10:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:10:10,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:10,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578020006] [2021-07-09 18:10:10,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578020006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:10,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646891816] [2021-07-09 18:10:10,097 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:10,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:10,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:10,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-09 18:10:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:10,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646891816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:10,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:10,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-07-09 18:10:10,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284394521] [2021-07-09 18:10:10,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:10:10,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:10,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:10:10,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1658, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:10:10,752 INFO L87 Difference]: Start difference. First operand 355 states and 734 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:13,309 INFO L93 Difference]: Finished difference Result 605 states and 1216 transitions. [2021-07-09 18:10:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 18:10:13,310 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 18:10:13,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:13,310 INFO L225 Difference]: With dead ends: 605 [2021-07-09 18:10:13,310 INFO L226 Difference]: Without dead ends: 573 [2021-07-09 18:10:13,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 2286.0ms TimeCoverageRelationStatistics Valid=647, Invalid=9655, Unknown=0, NotChecked=0, Total=10302 [2021-07-09 18:10:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-09 18:10:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 384. [2021-07-09 18:10:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0704960835509136) internal successors, (793), 383 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 793 transitions. [2021-07-09 18:10:13,315 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 793 transitions. Word has length 45 [2021-07-09 18:10:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:13,315 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 793 transitions. [2021-07-09 18:10:13,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 793 transitions. [2021-07-09 18:10:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:13,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:13,315 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:13,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 18:10:13,516 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:13,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 167 times [2021-07-09 18:10:13,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:13,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188931604] [2021-07-09 18:10:13,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:13,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:13,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188931604] [2021-07-09 18:10:13,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188931604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:13,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643782801] [2021-07-09 18:10:13,852 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:13,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:10:13,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:13,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:13,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:14,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643782801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:14,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:14,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:14,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270202193] [2021-07-09 18:10:14,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:14,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:14,501 INFO L87 Difference]: Start difference. First operand 384 states and 793 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:17,164 INFO L93 Difference]: Finished difference Result 934 states and 1837 transitions. [2021-07-09 18:10:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 18:10:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:17,165 INFO L225 Difference]: With dead ends: 934 [2021-07-09 18:10:17,166 INFO L226 Difference]: Without dead ends: 855 [2021-07-09 18:10:17,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3856 ImplicationChecksByTransitivity, 2755.6ms TimeCoverageRelationStatistics Valid=1642, Invalid=11468, Unknown=0, NotChecked=0, Total=13110 [2021-07-09 18:10:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-07-09 18:10:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 477. [2021-07-09 18:10:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.1512605042016806) internal successors, (1024), 476 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1024 transitions. [2021-07-09 18:10:17,173 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1024 transitions. Word has length 47 [2021-07-09 18:10:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:17,173 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1024 transitions. [2021-07-09 18:10:17,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1024 transitions. [2021-07-09 18:10:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:17,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:17,174 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:17,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:17,389 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1264016873, now seen corresponding path program 168 times [2021-07-09 18:10:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:17,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926621457] [2021-07-09 18:10:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:17,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:17,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926621457] [2021-07-09 18:10:17,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926621457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:17,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262345886] [2021-07-09 18:10:17,745 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:17,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:10:17,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:17,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-09 18:10:17,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:18,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262345886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:18,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:18,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:18,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79119240] [2021-07-09 18:10:18,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:18,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:18,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:18,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:18,455 INFO L87 Difference]: Start difference. First operand 477 states and 1024 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:21,612 INFO L93 Difference]: Finished difference Result 978 states and 1910 transitions. [2021-07-09 18:10:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-09 18:10:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:21,614 INFO L225 Difference]: With dead ends: 978 [2021-07-09 18:10:21,614 INFO L226 Difference]: Without dead ends: 910 [2021-07-09 18:10:21,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4027 ImplicationChecksByTransitivity, 3147.3ms TimeCoverageRelationStatistics Valid=1709, Invalid=12571, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:10:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-07-09 18:10:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 479. [2021-07-09 18:10:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1506276150627617) internal successors, (1028), 478 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1028 transitions. [2021-07-09 18:10:21,621 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1028 transitions. Word has length 47 [2021-07-09 18:10:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:21,621 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1028 transitions. [2021-07-09 18:10:21,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1028 transitions. [2021-07-09 18:10:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:21,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:21,621 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:21,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:21,822 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1204905819, now seen corresponding path program 169 times [2021-07-09 18:10:21,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:21,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364542357] [2021-07-09 18:10:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:22,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:22,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364542357] [2021-07-09 18:10:22,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364542357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:22,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555213902] [2021-07-09 18:10:22,158 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:22,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:22,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555213902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:22,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:22,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:22,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581357444] [2021-07-09 18:10:22,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:22,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:22,745 INFO L87 Difference]: Start difference. First operand 479 states and 1028 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:25,676 INFO L93 Difference]: Finished difference Result 976 states and 1908 transitions. [2021-07-09 18:10:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-09 18:10:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:25,678 INFO L225 Difference]: With dead ends: 976 [2021-07-09 18:10:25,678 INFO L226 Difference]: Without dead ends: 914 [2021-07-09 18:10:25,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2879.3ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 18:10:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-07-09 18:10:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 481. [2021-07-09 18:10:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.15) internal successors, (1032), 480 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1032 transitions. [2021-07-09 18:10:25,684 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1032 transitions. Word has length 47 [2021-07-09 18:10:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:25,684 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1032 transitions. [2021-07-09 18:10:25,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1032 transitions. [2021-07-09 18:10:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:25,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:25,685 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:25,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:25,907 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash -298668641, now seen corresponding path program 170 times [2021-07-09 18:10:25,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:25,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491112914] [2021-07-09 18:10:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:26,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:26,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491112914] [2021-07-09 18:10:26,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491112914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:26,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981769119] [2021-07-09 18:10:26,221 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:26,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:26,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:26,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:26,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:26,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981769119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:26,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:26,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:26,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086196926] [2021-07-09 18:10:26,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:26,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:26,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:26,826 INFO L87 Difference]: Start difference. First operand 481 states and 1032 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:29,837 INFO L93 Difference]: Finished difference Result 974 states and 1906 transitions. [2021-07-09 18:10:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-09 18:10:29,837 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:29,838 INFO L225 Difference]: With dead ends: 974 [2021-07-09 18:10:29,838 INFO L226 Difference]: Without dead ends: 918 [2021-07-09 18:10:29,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 2931.4ms TimeCoverageRelationStatistics Valid=1940, Invalid=14830, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:10:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-07-09 18:10:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 483. [2021-07-09 18:10:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.1493775933609958) internal successors, (1036), 482 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1036 transitions. [2021-07-09 18:10:29,844 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1036 transitions. Word has length 47 [2021-07-09 18:10:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:29,845 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1036 transitions. [2021-07-09 18:10:29,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1036 transitions. [2021-07-09 18:10:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:29,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:29,845 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:30,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-09 18:10:30,046 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:30,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1845015779, now seen corresponding path program 171 times [2021-07-09 18:10:30,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:30,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422833027] [2021-07-09 18:10:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:30,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422833027] [2021-07-09 18:10:30,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422833027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673591299] [2021-07-09 18:10:30,371 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:30,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 18:10:30,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:30,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:30,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:30,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673591299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:30,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:30,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:30,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438367264] [2021-07-09 18:10:30,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:30,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:30,965 INFO L87 Difference]: Start difference. First operand 483 states and 1036 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:34,236 INFO L93 Difference]: Finished difference Result 972 states and 1904 transitions. [2021-07-09 18:10:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-07-09 18:10:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:34,238 INFO L225 Difference]: With dead ends: 972 [2021-07-09 18:10:34,238 INFO L226 Difference]: Without dead ends: 922 [2021-07-09 18:10:34,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 3142.6ms TimeCoverageRelationStatistics Valid=2092, Invalid=15998, Unknown=0, NotChecked=0, Total=18090 [2021-07-09 18:10:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-07-09 18:10:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 485. [2021-07-09 18:10:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.1487603305785123) internal successors, (1040), 484 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1040 transitions. [2021-07-09 18:10:34,244 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1040 transitions. Word has length 47 [2021-07-09 18:10:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:34,244 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1040 transitions. [2021-07-09 18:10:34,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1040 transitions. [2021-07-09 18:10:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:34,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:34,245 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:34,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:34,446 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1419789017, now seen corresponding path program 172 times [2021-07-09 18:10:34,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:34,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477712201] [2021-07-09 18:10:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:34,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:34,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477712201] [2021-07-09 18:10:34,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477712201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:34,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590746194] [2021-07-09 18:10:34,773 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:34,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:34,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:34,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:35,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590746194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:35,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:35,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:35,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123938067] [2021-07-09 18:10:35,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:35,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:35,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:35,366 INFO L87 Difference]: Start difference. First operand 485 states and 1040 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:38,889 INFO L93 Difference]: Finished difference Result 970 states and 1902 transitions. [2021-07-09 18:10:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-07-09 18:10:38,889 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:38,890 INFO L225 Difference]: With dead ends: 970 [2021-07-09 18:10:38,890 INFO L226 Difference]: Without dead ends: 926 [2021-07-09 18:10:38,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6075 ImplicationChecksByTransitivity, 3287.1ms TimeCoverageRelationStatistics Valid=2264, Invalid=17196, Unknown=0, NotChecked=0, Total=19460 [2021-07-09 18:10:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-07-09 18:10:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 487. [2021-07-09 18:10:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1481481481481484) internal successors, (1044), 486 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1044 transitions. [2021-07-09 18:10:38,896 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1044 transitions. Word has length 47 [2021-07-09 18:10:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:38,896 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1044 transitions. [2021-07-09 18:10:38,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1044 transitions. [2021-07-09 18:10:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:38,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:38,897 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:39,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-07-09 18:10:39,097 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:39,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash -323746197, now seen corresponding path program 173 times [2021-07-09 18:10:39,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:39,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316182127] [2021-07-09 18:10:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:39,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:39,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316182127] [2021-07-09 18:10:39,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316182127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:39,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798924311] [2021-07-09 18:10:39,419 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:39,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:10:39,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:39,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:40,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798924311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:40,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:40,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:40,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216897001] [2021-07-09 18:10:40,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:40,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:40,003 INFO L87 Difference]: Start difference. First operand 487 states and 1044 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:43,709 INFO L93 Difference]: Finished difference Result 968 states and 1900 transitions. [2021-07-09 18:10:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-07-09 18:10:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:43,710 INFO L225 Difference]: With dead ends: 968 [2021-07-09 18:10:43,710 INFO L226 Difference]: Without dead ends: 930 [2021-07-09 18:10:43,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6565 ImplicationChecksByTransitivity, 3408.7ms TimeCoverageRelationStatistics Valid=2461, Invalid=18419, Unknown=0, NotChecked=0, Total=20880 [2021-07-09 18:10:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-09 18:10:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 489. [2021-07-09 18:10:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.1475409836065573) internal successors, (1048), 488 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1048 transitions. [2021-07-09 18:10:43,717 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1048 transitions. Word has length 47 [2021-07-09 18:10:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:43,717 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1048 transitions. [2021-07-09 18:10:43,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1048 transitions. [2021-07-09 18:10:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:43,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:43,718 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:43,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-07-09 18:10:43,918 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 508678319, now seen corresponding path program 174 times [2021-07-09 18:10:43,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:43,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950918551] [2021-07-09 18:10:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:44,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:44,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950918551] [2021-07-09 18:10:44,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950918551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:44,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882279639] [2021-07-09 18:10:44,276 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:44,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:10:44,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:44,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:44,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882279639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:44,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:44,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:44,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520707480] [2021-07-09 18:10:44,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:44,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:44,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:44,869 INFO L87 Difference]: Start difference. First operand 489 states and 1048 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:48,805 INFO L93 Difference]: Finished difference Result 1037 states and 2023 transitions. [2021-07-09 18:10:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-09 18:10:48,805 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:48,806 INFO L225 Difference]: With dead ends: 1037 [2021-07-09 18:10:48,806 INFO L226 Difference]: Without dead ends: 992 [2021-07-09 18:10:48,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6908 ImplicationChecksByTransitivity, 3767.6ms TimeCoverageRelationStatistics Valid=2661, Invalid=19391, Unknown=0, NotChecked=0, Total=22052 [2021-07-09 18:10:48,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-07-09 18:10:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 492. [2021-07-09 18:10:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.15071283095723) internal successors, (1056), 491 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1056 transitions. [2021-07-09 18:10:48,813 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1056 transitions. Word has length 47 [2021-07-09 18:10:48,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:48,813 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1056 transitions. [2021-07-09 18:10:48,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1056 transitions. [2021-07-09 18:10:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:48,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:48,814 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:49,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-07-09 18:10:49,014 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:49,015 INFO L82 PathProgramCache]: Analyzing trace with hash -756249541, now seen corresponding path program 175 times [2021-07-09 18:10:49,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:49,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767432981] [2021-07-09 18:10:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:49,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:49,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767432981] [2021-07-09 18:10:49,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767432981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:49,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057156811] [2021-07-09 18:10:49,378 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:49,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:49,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057156811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:49,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:49,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:49,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512621831] [2021-07-09 18:10:49,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:49,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:49,957 INFO L87 Difference]: Start difference. First operand 492 states and 1056 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:53,621 INFO L93 Difference]: Finished difference Result 887 states and 1742 transitions. [2021-07-09 18:10:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-09 18:10:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:53,623 INFO L225 Difference]: With dead ends: 887 [2021-07-09 18:10:53,623 INFO L226 Difference]: Without dead ends: 867 [2021-07-09 18:10:53,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5722 ImplicationChecksByTransitivity, 3416.5ms TimeCoverageRelationStatistics Valid=2444, Invalid=16188, Unknown=0, NotChecked=0, Total=18632 [2021-07-09 18:10:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-07-09 18:10:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 493. [2021-07-09 18:10:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1504065040650406) internal successors, (1058), 492 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1058 transitions. [2021-07-09 18:10:53,628 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1058 transitions. Word has length 47 [2021-07-09 18:10:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:53,628 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1058 transitions. [2021-07-09 18:10:53,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1058 transitions. [2021-07-09 18:10:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:53,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:53,629 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:53,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-07-09 18:10:53,830 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:53,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:53,830 INFO L82 PathProgramCache]: Analyzing trace with hash -110443807, now seen corresponding path program 176 times [2021-07-09 18:10:53,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:53,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439306742] [2021-07-09 18:10:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:54,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:54,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439306742] [2021-07-09 18:10:54,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439306742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:54,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133658068] [2021-07-09 18:10:54,120 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:54,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:54,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:54,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:54,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133658068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:54,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:54,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:54,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513558002] [2021-07-09 18:10:54,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:54,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:54,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:54,705 INFO L87 Difference]: Start difference. First operand 493 states and 1058 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:57,550 INFO L93 Difference]: Finished difference Result 958 states and 1874 transitions. [2021-07-09 18:10:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-09 18:10:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:10:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:57,551 INFO L225 Difference]: With dead ends: 958 [2021-07-09 18:10:57,551 INFO L226 Difference]: Without dead ends: 896 [2021-07-09 18:10:57,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 2600.6ms TimeCoverageRelationStatistics Valid=1615, Invalid=12665, Unknown=0, NotChecked=0, Total=14280 [2021-07-09 18:10:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-07-09 18:10:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 499. [2021-07-09 18:10:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.1485943775100402) internal successors, (1070), 498 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1070 transitions. [2021-07-09 18:10:57,558 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1070 transitions. Word has length 47 [2021-07-09 18:10:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:57,558 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1070 transitions. [2021-07-09 18:10:57,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1070 transitions. [2021-07-09 18:10:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:10:57,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:57,558 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:57,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-09 18:10:57,759 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1614018267, now seen corresponding path program 177 times [2021-07-09 18:10:57,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:57,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866512411] [2021-07-09 18:10:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:58,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:58,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866512411] [2021-07-09 18:10:58,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866512411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:58,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075928854] [2021-07-09 18:10:58,044 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:58,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 18:10:58,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:58,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:10:58,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:58,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075928854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:58,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:58,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:10:58,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634278494] [2021-07-09 18:10:58,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:10:58,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:10:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:10:58,635 INFO L87 Difference]: Start difference. First operand 499 states and 1070 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:01,472 INFO L93 Difference]: Finished difference Result 963 states and 1895 transitions. [2021-07-09 18:11:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:11:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:01,474 INFO L225 Difference]: With dead ends: 963 [2021-07-09 18:11:01,474 INFO L226 Difference]: Without dead ends: 907 [2021-07-09 18:11:01,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 2725.7ms TimeCoverageRelationStatistics Valid=1746, Invalid=13754, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 18:11:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-07-09 18:11:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 505. [2021-07-09 18:11:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1547619047619047) internal successors, (1086), 504 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1086 transitions. [2021-07-09 18:11:01,481 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1086 transitions. Word has length 47 [2021-07-09 18:11:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:01,481 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1086 transitions. [2021-07-09 18:11:01,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1086 transitions. [2021-07-09 18:11:01,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:01,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:01,482 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:01,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-07-09 18:11:01,682 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:01,683 INFO L82 PathProgramCache]: Analyzing trace with hash 529666153, now seen corresponding path program 178 times [2021-07-09 18:11:01,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:01,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487654612] [2021-07-09 18:11:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:01,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:01,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487654612] [2021-07-09 18:11:01,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487654612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:01,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468075552] [2021-07-09 18:11:01,997 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:02,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:02,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:02,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468075552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:02,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:02,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:02,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444043655] [2021-07-09 18:11:02,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:02,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:02,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:02,586 INFO L87 Difference]: Start difference. First operand 505 states and 1086 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:05,751 INFO L93 Difference]: Finished difference Result 971 states and 1921 transitions. [2021-07-09 18:11:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:11:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:05,753 INFO L225 Difference]: With dead ends: 971 [2021-07-09 18:11:05,753 INFO L226 Difference]: Without dead ends: 921 [2021-07-09 18:11:05,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5184 ImplicationChecksByTransitivity, 2954.2ms TimeCoverageRelationStatistics Valid=1898, Invalid=14872, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:11:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-07-09 18:11:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 511. [2021-07-09 18:11:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.16078431372549) internal successors, (1102), 510 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1102 transitions. [2021-07-09 18:11:05,759 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1102 transitions. Word has length 47 [2021-07-09 18:11:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:05,759 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1102 transitions. [2021-07-09 18:11:05,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1102 transitions. [2021-07-09 18:11:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:05,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:05,760 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:05,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:05,961 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1559828653, now seen corresponding path program 179 times [2021-07-09 18:11:05,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:05,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139356789] [2021-07-09 18:11:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:06,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:06,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139356789] [2021-07-09 18:11:06,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139356789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:06,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474048937] [2021-07-09 18:11:06,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:06,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:11:06,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:06,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:06,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:06,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474048937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:06,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:06,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:06,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771825601] [2021-07-09 18:11:06,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:06,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:06,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:06,870 INFO L87 Difference]: Start difference. First operand 511 states and 1102 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:10,237 INFO L93 Difference]: Finished difference Result 979 states and 1947 transitions. [2021-07-09 18:11:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-09 18:11:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:10,239 INFO L225 Difference]: With dead ends: 979 [2021-07-09 18:11:10,239 INFO L226 Difference]: Without dead ends: 935 [2021-07-09 18:11:10,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5631 ImplicationChecksByTransitivity, 3086.4ms TimeCoverageRelationStatistics Valid=2070, Invalid=16020, Unknown=0, NotChecked=0, Total=18090 [2021-07-09 18:11:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-07-09 18:11:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 517. [2021-07-09 18:11:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.1666666666666665) internal successors, (1118), 516 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) [2021-07-09 18:11:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1118 transitions. [2021-07-09 18:11:10,246 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1118 transitions. Word has length 47 [2021-07-09 18:11:10,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:10,246 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1118 transitions. [2021-07-09 18:11:10,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:10,246 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1118 transitions. [2021-07-09 18:11:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:10,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:10,246 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:10,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:10,447 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1639095823, now seen corresponding path program 180 times [2021-07-09 18:11:10,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:10,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543320723] [2021-07-09 18:11:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:10,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:10,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543320723] [2021-07-09 18:11:10,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543320723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:10,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605989910] [2021-07-09 18:11:10,765 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:10,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:11:10,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:10,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:10,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:11,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605989910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:11,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:11,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:11,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072679051] [2021-07-09 18:11:11,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:11,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:11,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:11,351 INFO L87 Difference]: Start difference. First operand 517 states and 1118 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:14,832 INFO L93 Difference]: Finished difference Result 987 states and 1973 transitions. [2021-07-09 18:11:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-09 18:11:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:14,834 INFO L225 Difference]: With dead ends: 987 [2021-07-09 18:11:14,834 INFO L226 Difference]: Without dead ends: 949 [2021-07-09 18:11:14,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6092 ImplicationChecksByTransitivity, 3240.5ms TimeCoverageRelationStatistics Valid=2267, Invalid=17193, Unknown=0, NotChecked=0, Total=19460 [2021-07-09 18:11:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-07-09 18:11:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 523. [2021-07-09 18:11:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1724137931034484) internal successors, (1134), 522 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1134 transitions. [2021-07-09 18:11:14,840 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1134 transitions. Word has length 47 [2021-07-09 18:11:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:14,840 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1134 transitions. [2021-07-09 18:11:14,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1134 transitions. [2021-07-09 18:11:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:14,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:14,841 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:15,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:15,041 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash -806671307, now seen corresponding path program 181 times [2021-07-09 18:11:15,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:15,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114448471] [2021-07-09 18:11:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:15,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114448471] [2021-07-09 18:11:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114448471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997179863] [2021-07-09 18:11:15,394 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:15,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:15,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997179863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:15,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:15,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:15,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008153724] [2021-07-09 18:11:15,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:15,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:15,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:15,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:15,975 INFO L87 Difference]: Start difference. First operand 523 states and 1134 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:19,939 INFO L93 Difference]: Finished difference Result 1095 states and 2169 transitions. [2021-07-09 18:11:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-09 18:11:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:19,941 INFO L225 Difference]: With dead ends: 1095 [2021-07-09 18:11:19,941 INFO L226 Difference]: Without dead ends: 1050 [2021-07-09 18:11:19,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6417 ImplicationChecksByTransitivity, 3594.0ms TimeCoverageRelationStatistics Valid=2470, Invalid=18122, Unknown=0, NotChecked=0, Total=20592 [2021-07-09 18:11:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-07-09 18:11:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 527. [2021-07-09 18:11:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.17680608365019) internal successors, (1145), 526 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:19,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1145 transitions. [2021-07-09 18:11:19,948 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1145 transitions. Word has length 47 [2021-07-09 18:11:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:19,948 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1145 transitions. [2021-07-09 18:11:19,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1145 transitions. [2021-07-09 18:11:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:19,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:19,948 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:20,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:20,149 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:20,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2071599167, now seen corresponding path program 182 times [2021-07-09 18:11:20,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:20,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261694015] [2021-07-09 18:11:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:20,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:20,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261694015] [2021-07-09 18:11:20,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261694015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:20,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093354685] [2021-07-09 18:11:20,504 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:20,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:20,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:20,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:21,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093354685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:21,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:21,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:21,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079520492] [2021-07-09 18:11:21,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:21,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:21,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:21,106 INFO L87 Difference]: Start difference. First operand 527 states and 1145 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:24,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:24,610 INFO L93 Difference]: Finished difference Result 945 states and 1898 transitions. [2021-07-09 18:11:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:11:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:24,612 INFO L225 Difference]: With dead ends: 945 [2021-07-09 18:11:24,612 INFO L226 Difference]: Without dead ends: 925 [2021-07-09 18:11:24,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5370 ImplicationChecksByTransitivity, 3329.6ms TimeCoverageRelationStatistics Valid=2321, Invalid=15235, Unknown=0, NotChecked=0, Total=17556 [2021-07-09 18:11:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-07-09 18:11:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 505. [2021-07-09 18:11:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1626984126984126) internal successors, (1090), 504 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1090 transitions. [2021-07-09 18:11:24,619 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1090 transitions. Word has length 47 [2021-07-09 18:11:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:24,619 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1090 transitions. [2021-07-09 18:11:24,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1090 transitions. [2021-07-09 18:11:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:24,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:24,619 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:24,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:24,820 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:24,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:24,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1368922593, now seen corresponding path program 183 times [2021-07-09 18:11:24,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:24,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850225967] [2021-07-09 18:11:24,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:25,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:25,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850225967] [2021-07-09 18:11:25,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850225967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:25,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941484204] [2021-07-09 18:11:25,114 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:25,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 18:11:25,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:25,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:25,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:25,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941484204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:25,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:25,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:25,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110847287] [2021-07-09 18:11:25,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:25,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:25,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:25,717 INFO L87 Difference]: Start difference. First operand 505 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:28,629 INFO L93 Difference]: Finished difference Result 947 states and 1867 transitions. [2021-07-09 18:11:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:11:28,629 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:28,630 INFO L225 Difference]: With dead ends: 947 [2021-07-09 18:11:28,630 INFO L226 Difference]: Without dead ends: 891 [2021-07-09 18:11:28,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4884 ImplicationChecksByTransitivity, 2778.2ms TimeCoverageRelationStatistics Valid=1731, Invalid=14019, Unknown=0, NotChecked=0, Total=15750 [2021-07-09 18:11:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-07-09 18:11:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 509. [2021-07-09 18:11:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.161417322834646) internal successors, (1098), 508 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1098 transitions. [2021-07-09 18:11:28,637 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1098 transitions. Word has length 47 [2021-07-09 18:11:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:28,637 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1098 transitions. [2021-07-09 18:11:28,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1098 transitions. [2021-07-09 18:11:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:28,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:28,637 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:28,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-09 18:11:28,838 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:28,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash -782360283, now seen corresponding path program 184 times [2021-07-09 18:11:28,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:28,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156065257] [2021-07-09 18:11:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:29,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:29,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156065257] [2021-07-09 18:11:29,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156065257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:29,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218220666] [2021-07-09 18:11:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:29,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:29,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:29,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218220666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:29,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:29,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:29,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716236580] [2021-07-09 18:11:29,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:29,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:29,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:29,798 INFO L87 Difference]: Start difference. First operand 509 states and 1098 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:33,089 INFO L93 Difference]: Finished difference Result 954 states and 1892 transitions. [2021-07-09 18:11:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:11:33,089 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:33,090 INFO L225 Difference]: With dead ends: 954 [2021-07-09 18:11:33,090 INFO L226 Difference]: Without dead ends: 904 [2021-07-09 18:11:33,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5322 ImplicationChecksByTransitivity, 3021.5ms TimeCoverageRelationStatistics Valid=1901, Invalid=15129, Unknown=0, NotChecked=0, Total=17030 [2021-07-09 18:11:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-09 18:11:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 515. [2021-07-09 18:11:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.167315175097276) internal successors, (1114), 514 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1114 transitions. [2021-07-09 18:11:33,097 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1114 transitions. Word has length 47 [2021-07-09 18:11:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:33,097 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1114 transitions. [2021-07-09 18:11:33,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1114 transitions. [2021-07-09 18:11:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:33,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:33,097 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:33,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-09 18:11:33,298 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash 247802217, now seen corresponding path program 185 times [2021-07-09 18:11:33,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:33,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015557091] [2021-07-09 18:11:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:33,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:33,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015557091] [2021-07-09 18:11:33,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015557091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:33,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171679816] [2021-07-09 18:11:33,619 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:33,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:11:33,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:33,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:33,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:34,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171679816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:34,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:34,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:34,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29901835] [2021-07-09 18:11:34,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:34,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:34,223 INFO L87 Difference]: Start difference. First operand 515 states and 1114 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:37,436 INFO L93 Difference]: Finished difference Result 964 states and 1922 transitions. [2021-07-09 18:11:37,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-09 18:11:37,437 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:37,438 INFO L225 Difference]: With dead ends: 964 [2021-07-09 18:11:37,438 INFO L226 Difference]: Without dead ends: 920 [2021-07-09 18:11:37,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5770 ImplicationChecksByTransitivity, 3129.9ms TimeCoverageRelationStatistics Valid=2082, Invalid=16278, Unknown=0, NotChecked=0, Total=18360 [2021-07-09 18:11:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-09 18:11:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 521. [2021-07-09 18:11:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.173076923076923) internal successors, (1130), 520 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1130 transitions. [2021-07-09 18:11:37,444 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1130 transitions. Word has length 47 [2021-07-09 18:11:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:37,445 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1130 transitions. [2021-07-09 18:11:37,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1130 transitions. [2021-07-09 18:11:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:37,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:37,445 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:37,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:37,646 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1343845037, now seen corresponding path program 186 times [2021-07-09 18:11:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:37,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044082141] [2021-07-09 18:11:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:37,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:37,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044082141] [2021-07-09 18:11:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044082141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:37,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314956441] [2021-07-09 18:11:37,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:38,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:11:38,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:38,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:38,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314956441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:38,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:38,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:38,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527642005] [2021-07-09 18:11:38,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:38,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:38,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:38,568 INFO L87 Difference]: Start difference. First operand 521 states and 1130 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:42,073 INFO L93 Difference]: Finished difference Result 974 states and 1952 transitions. [2021-07-09 18:11:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-09 18:11:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:42,074 INFO L225 Difference]: With dead ends: 974 [2021-07-09 18:11:42,074 INFO L226 Difference]: Without dead ends: 936 [2021-07-09 18:11:42,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6232 ImplicationChecksByTransitivity, 3277.5ms TimeCoverageRelationStatistics Valid=2288, Invalid=17452, Unknown=0, NotChecked=0, Total=19740 [2021-07-09 18:11:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-07-09 18:11:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 527. [2021-07-09 18:11:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.178707224334601) internal successors, (1146), 526 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1146 transitions. [2021-07-09 18:11:42,080 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1146 transitions. Word has length 47 [2021-07-09 18:11:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:42,080 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1146 transitions. [2021-07-09 18:11:42,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1146 transitions. [2021-07-09 18:11:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:42,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:42,081 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:42,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:42,282 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2118697743, now seen corresponding path program 187 times [2021-07-09 18:11:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:42,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776530589] [2021-07-09 18:11:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:42,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:42,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776530589] [2021-07-09 18:11:42,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776530589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:42,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708398034] [2021-07-09 18:11:42,632 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:42,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708398034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:43,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:43,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:43,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012433404] [2021-07-09 18:11:43,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:43,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:43,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:43,230 INFO L87 Difference]: Start difference. First operand 527 states and 1146 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:47,134 INFO L93 Difference]: Finished difference Result 1084 states and 2152 transitions. [2021-07-09 18:11:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-09 18:11:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:47,136 INFO L225 Difference]: With dead ends: 1084 [2021-07-09 18:11:47,136 INFO L226 Difference]: Without dead ends: 1039 [2021-07-09 18:11:47,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6553 ImplicationChecksByTransitivity, 3607.1ms TimeCoverageRelationStatistics Valid=2500, Invalid=18380, Unknown=0, NotChecked=0, Total=20880 [2021-07-09 18:11:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-07-09 18:11:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 531. [2021-07-09 18:11:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.1830188679245284) internal successors, (1157), 530 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1157 transitions. [2021-07-09 18:11:47,143 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1157 transitions. Word has length 47 [2021-07-09 18:11:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:47,143 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1157 transitions. [2021-07-09 18:11:47,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1157 transitions. [2021-07-09 18:11:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:47,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:47,143 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:47,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-07-09 18:11:47,344 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:47,344 INFO L82 PathProgramCache]: Analyzing trace with hash 911341693, now seen corresponding path program 188 times [2021-07-09 18:11:47,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:47,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914287438] [2021-07-09 18:11:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:47,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:47,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914287438] [2021-07-09 18:11:47,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914287438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:47,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865017562] [2021-07-09 18:11:47,718 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:47,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:47,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:47,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:47,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865017562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:48,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:48,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:48,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406788540] [2021-07-09 18:11:48,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:48,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:48,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:48,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:48,308 INFO L87 Difference]: Start difference. First operand 531 states and 1157 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:51,990 INFO L93 Difference]: Finished difference Result 937 states and 1886 transitions. [2021-07-09 18:11:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:11:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:51,991 INFO L225 Difference]: With dead ends: 937 [2021-07-09 18:11:51,991 INFO L226 Difference]: Without dead ends: 917 [2021-07-09 18:11:51,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5494 ImplicationChecksByTransitivity, 3371.0ms TimeCoverageRelationStatistics Valid=2362, Invalid=15460, Unknown=0, NotChecked=0, Total=17822 [2021-07-09 18:11:51,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-07-09 18:11:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 503. [2021-07-09 18:11:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.1553784860557768) internal successors, (1082), 502 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1082 transitions. [2021-07-09 18:11:52,005 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1082 transitions. Word has length 47 [2021-07-09 18:11:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:52,005 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1082 transitions. [2021-07-09 18:11:52,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1082 transitions. [2021-07-09 18:11:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:52,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:52,005 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:52,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:52,206 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:52,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1288752927, now seen corresponding path program 189 times [2021-07-09 18:11:52,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:52,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95652091] [2021-07-09 18:11:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:52,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:52,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95652091] [2021-07-09 18:11:52,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95652091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:52,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284160255] [2021-07-09 18:11:52,526 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:52,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 18:11:52,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:52,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:53,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284160255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:53,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:53,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:53,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69673934] [2021-07-09 18:11:53,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:53,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:53,133 INFO L87 Difference]: Start difference. First operand 503 states and 1082 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:56,168 INFO L93 Difference]: Finished difference Result 924 states and 1824 transitions. [2021-07-09 18:11:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:11:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:11:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:56,169 INFO L225 Difference]: With dead ends: 924 [2021-07-09 18:11:56,169 INFO L226 Difference]: Without dead ends: 874 [2021-07-09 18:11:56,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 3028.9ms TimeCoverageRelationStatistics Valid=1879, Invalid=15413, Unknown=0, NotChecked=0, Total=17292 [2021-07-09 18:11:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-07-09 18:11:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 507. [2021-07-09 18:11:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.1541501976284585) internal successors, (1090), 506 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1090 transitions. [2021-07-09 18:11:56,175 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1090 transitions. Word has length 47 [2021-07-09 18:11:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:56,175 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1090 transitions. [2021-07-09 18:11:56,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1090 transitions. [2021-07-09 18:11:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:11:56,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:56,176 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:56,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-07-09 18:11:56,386 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:56,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash -258590427, now seen corresponding path program 190 times [2021-07-09 18:11:56,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:56,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143404337] [2021-07-09 18:11:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:56,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:56,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143404337] [2021-07-09 18:11:56,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143404337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:56,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364234831] [2021-07-09 18:11:56,781 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:56,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:56,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:11:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:57,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364234831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:57,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:57,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:11:57,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669955713] [2021-07-09 18:11:57,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:11:57,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:11:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:11:57,377 INFO L87 Difference]: Start difference. First operand 507 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:00,850 INFO L93 Difference]: Finished difference Result 933 states and 1853 transitions. [2021-07-09 18:12:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-09 18:12:00,850 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:00,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:00,851 INFO L225 Difference]: With dead ends: 933 [2021-07-09 18:12:00,851 INFO L226 Difference]: Without dead ends: 889 [2021-07-09 18:12:00,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 3211.2ms TimeCoverageRelationStatistics Valid=2078, Invalid=16554, Unknown=0, NotChecked=0, Total=18632 [2021-07-09 18:12:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-07-09 18:12:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 513. [2021-07-09 18:12:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.16015625) internal successors, (1106), 512 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:00,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1106 transitions. [2021-07-09 18:12:00,858 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1106 transitions. Word has length 47 [2021-07-09 18:12:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:00,859 INFO L482 AbstractCegarLoop]: Abstraction has 513 states and 1106 transitions. [2021-07-09 18:12:00,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1106 transitions. [2021-07-09 18:12:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:00,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:00,860 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:01,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:01,061 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash 837452393, now seen corresponding path program 191 times [2021-07-09 18:12:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:01,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955831271] [2021-07-09 18:12:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:01,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:01,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955831271] [2021-07-09 18:12:01,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955831271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:01,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617089312] [2021-07-09 18:12:01,407 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:01,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:12:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:01,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:01,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617089312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:02,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:02,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:02,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592936086] [2021-07-09 18:12:02,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:02,005 INFO L87 Difference]: Start difference. First operand 513 states and 1106 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:05,423 INFO L93 Difference]: Finished difference Result 945 states and 1887 transitions. [2021-07-09 18:12:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-09 18:12:05,424 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:05,425 INFO L225 Difference]: With dead ends: 945 [2021-07-09 18:12:05,425 INFO L226 Difference]: Without dead ends: 907 [2021-07-09 18:12:05,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6385 ImplicationChecksByTransitivity, 3309.2ms TimeCoverageRelationStatistics Valid=2293, Invalid=17729, Unknown=0, NotChecked=0, Total=20022 [2021-07-09 18:12:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-07-09 18:12:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 519. [2021-07-09 18:12:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.166023166023166) internal successors, (1122), 518 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1122 transitions. [2021-07-09 18:12:05,432 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1122 transitions. Word has length 47 [2021-07-09 18:12:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:05,432 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1122 transitions. [2021-07-09 18:12:05,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1122 transitions. [2021-07-09 18:12:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:05,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:05,433 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:05,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:05,633 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:05,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:05,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1669876909, now seen corresponding path program 192 times [2021-07-09 18:12:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:05,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157178887] [2021-07-09 18:12:05,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:06,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:06,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157178887] [2021-07-09 18:12:06,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157178887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:06,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364625656] [2021-07-09 18:12:06,001 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:06,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:12:06,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:06,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:06,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364625656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:06,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:06,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:06,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889837780] [2021-07-09 18:12:06,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:06,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:06,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:06,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:06,592 INFO L87 Difference]: Start difference. First operand 519 states and 1122 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:10,757 INFO L93 Difference]: Finished difference Result 1057 states and 2091 transitions. [2021-07-09 18:12:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-09 18:12:10,757 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:10,758 INFO L225 Difference]: With dead ends: 1057 [2021-07-09 18:12:10,759 INFO L226 Difference]: Without dead ends: 1012 [2021-07-09 18:12:10,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 3655.7ms TimeCoverageRelationStatistics Valid=2514, Invalid=18656, Unknown=0, NotChecked=0, Total=21170 [2021-07-09 18:12:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-07-09 18:12:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 523. [2021-07-09 18:12:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1704980842911876) internal successors, (1133), 522 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1133 transitions. [2021-07-09 18:12:10,765 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1133 transitions. Word has length 47 [2021-07-09 18:12:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:10,765 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1133 transitions. [2021-07-09 18:12:10,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1133 transitions. [2021-07-09 18:12:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:10,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:10,766 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:10,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-07-09 18:12:10,966 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash 404949049, now seen corresponding path program 193 times [2021-07-09 18:12:10,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:10,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028542655] [2021-07-09 18:12:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:11,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:11,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028542655] [2021-07-09 18:12:11,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028542655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:11,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872531863] [2021-07-09 18:12:11,319 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:11,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:11,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872531863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:11,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:11,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:11,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402342979] [2021-07-09 18:12:11,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:11,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1875, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:11,931 INFO L87 Difference]: Start difference. First operand 523 states and 1133 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:15,484 INFO L93 Difference]: Finished difference Result 913 states and 1830 transitions. [2021-07-09 18:12:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:12:15,484 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:15,485 INFO L225 Difference]: With dead ends: 913 [2021-07-09 18:12:15,485 INFO L226 Difference]: Without dead ends: 893 [2021-07-09 18:12:15,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 3426.1ms TimeCoverageRelationStatistics Valid=2386, Invalid=15704, Unknown=0, NotChecked=0, Total=18090 [2021-07-09 18:12:15,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-07-09 18:12:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 501. [2021-07-09 18:12:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.148) internal successors, (1074), 500 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1074 transitions. [2021-07-09 18:12:15,491 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1074 transitions. Word has length 47 [2021-07-09 18:12:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:15,491 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1074 transitions. [2021-07-09 18:12:15,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1074 transitions. [2021-07-09 18:12:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:15,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:15,492 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:15,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-09 18:12:15,692 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -308279327, now seen corresponding path program 194 times [2021-07-09 18:12:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:15,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269099415] [2021-07-09 18:12:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:16,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:16,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269099415] [2021-07-09 18:12:16,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269099415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:16,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862040482] [2021-07-09 18:12:16,007 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:16,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:16,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:16,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:16,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:16,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862040482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:16,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:16,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:16,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116291523] [2021-07-09 18:12:16,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:16,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:16,614 INFO L87 Difference]: Start difference. First operand 501 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:19,802 INFO L93 Difference]: Finished difference Result 901 states and 1781 transitions. [2021-07-09 18:12:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-09 18:12:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:19,803 INFO L225 Difference]: With dead ends: 901 [2021-07-09 18:12:19,803 INFO L226 Difference]: Without dead ends: 857 [2021-07-09 18:12:19,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6064 ImplicationChecksByTransitivity, 3175.3ms TimeCoverageRelationStatistics Valid=2049, Invalid=16857, Unknown=0, NotChecked=0, Total=18906 [2021-07-09 18:12:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-07-09 18:12:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 505. [2021-07-09 18:12:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1468253968253967) internal successors, (1082), 504 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1082 transitions. [2021-07-09 18:12:19,809 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1082 transitions. Word has length 47 [2021-07-09 18:12:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:19,809 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1082 transitions. [2021-07-09 18:12:19,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1082 transitions. [2021-07-09 18:12:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:19,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:19,810 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:20,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-09 18:12:20,011 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:20,011 INFO L82 PathProgramCache]: Analyzing trace with hash 787763493, now seen corresponding path program 195 times [2021-07-09 18:12:20,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:20,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142258643] [2021-07-09 18:12:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:20,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:20,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142258643] [2021-07-09 18:12:20,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142258643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:20,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138248923] [2021-07-09 18:12:20,331 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:20,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 18:12:20,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:20,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-09 18:12:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:20,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138248923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:20,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:20,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-07-09 18:12:20,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394551501] [2021-07-09 18:12:20,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:12:20,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:20,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:12:20,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:12:20,974 INFO L87 Difference]: Start difference. First operand 505 states and 1082 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:24,408 INFO L93 Difference]: Finished difference Result 907 states and 1805 transitions. [2021-07-09 18:12:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-09 18:12:24,408 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:24,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:24,409 INFO L225 Difference]: With dead ends: 907 [2021-07-09 18:12:24,409 INFO L226 Difference]: Without dead ends: 875 [2021-07-09 18:12:24,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6572 ImplicationChecksByTransitivity, 3338.9ms TimeCoverageRelationStatistics Valid=2282, Invalid=18024, Unknown=0, NotChecked=0, Total=20306 [2021-07-09 18:12:24,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-07-09 18:12:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 510. [2021-07-09 18:12:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.1532416502946954) internal successors, (1096), 509 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1096 transitions. [2021-07-09 18:12:24,416 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1096 transitions. Word has length 47 [2021-07-09 18:12:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:24,416 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1096 transitions. [2021-07-09 18:12:24,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1096 transitions. [2021-07-09 18:12:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:24,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:24,417 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:24,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-09 18:12:24,617 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:24,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:24,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1620188009, now seen corresponding path program 196 times [2021-07-09 18:12:24,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:24,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857251447] [2021-07-09 18:12:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:24,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:24,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857251447] [2021-07-09 18:12:24,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857251447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874568355] [2021-07-09 18:12:24,985 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:25,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:25,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:25,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:25,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:25,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874568355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:25,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:25,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:25,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63211685] [2021-07-09 18:12:25,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:25,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:25,589 INFO L87 Difference]: Start difference. First operand 510 states and 1096 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:29,613 INFO L93 Difference]: Finished difference Result 1031 states and 2030 transitions. [2021-07-09 18:12:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-09 18:12:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:29,614 INFO L225 Difference]: With dead ends: 1031 [2021-07-09 18:12:29,614 INFO L226 Difference]: Without dead ends: 977 [2021-07-09 18:12:29,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6988 ImplicationChecksByTransitivity, 3748.1ms TimeCoverageRelationStatistics Valid=2535, Invalid=19221, Unknown=0, NotChecked=0, Total=21756 [2021-07-09 18:12:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-07-09 18:12:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 515. [2021-07-09 18:12:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.157587548638132) internal successors, (1109), 514 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1109 transitions. [2021-07-09 18:12:29,621 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1109 transitions. Word has length 47 [2021-07-09 18:12:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:29,621 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1109 transitions. [2021-07-09 18:12:29,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1109 transitions. [2021-07-09 18:12:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:29,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:29,621 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:29,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-07-09 18:12:29,822 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 355260149, now seen corresponding path program 197 times [2021-07-09 18:12:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:29,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567855960] [2021-07-09 18:12:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:30,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:30,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567855960] [2021-07-09 18:12:30,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567855960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463747079] [2021-07-09 18:12:30,174 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:30,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:12:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:30,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:30,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463747079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:30,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856576002] [2021-07-09 18:12:30,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:30,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:30,776 INFO L87 Difference]: Start difference. First operand 515 states and 1109 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:34,343 INFO L93 Difference]: Finished difference Result 881 states and 1758 transitions. [2021-07-09 18:12:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:12:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:34,345 INFO L225 Difference]: With dead ends: 881 [2021-07-09 18:12:34,345 INFO L226 Difference]: Without dead ends: 861 [2021-07-09 18:12:34,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5783 ImplicationChecksByTransitivity, 3521.9ms TimeCoverageRelationStatistics Valid=2393, Invalid=15967, Unknown=0, NotChecked=0, Total=18360 [2021-07-09 18:12:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-07-09 18:12:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 499. [2021-07-09 18:12:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.140562248995984) internal successors, (1066), 498 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1066 transitions. [2021-07-09 18:12:34,351 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1066 transitions. Word has length 47 [2021-07-09 18:12:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:34,351 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1066 transitions. [2021-07-09 18:12:34,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1066 transitions. [2021-07-09 18:12:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:34,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:34,351 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:34,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-07-09 18:12:34,552 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:34,552 INFO L82 PathProgramCache]: Analyzing trace with hash -329605407, now seen corresponding path program 198 times [2021-07-09 18:12:34,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:34,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513236079] [2021-07-09 18:12:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:34,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:34,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513236079] [2021-07-09 18:12:34,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513236079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:34,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976384267] [2021-07-09 18:12:34,869 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:34,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:12:34,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:34,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:34,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:35,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976384267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:35,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:35,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:35,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647447941] [2021-07-09 18:12:35,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:35,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:35,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:35,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:35,472 INFO L87 Difference]: Start difference. First operand 499 states and 1066 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:39,055 INFO L93 Difference]: Finished difference Result 858 states and 1689 transitions. [2021-07-09 18:12:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-09 18:12:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:39,057 INFO L225 Difference]: With dead ends: 858 [2021-07-09 18:12:39,057 INFO L226 Difference]: Without dead ends: 820 [2021-07-09 18:12:39,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 3393.9ms TimeCoverageRelationStatistics Valid=2246, Invalid=18346, Unknown=0, NotChecked=0, Total=20592 [2021-07-09 18:12:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-09 18:12:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 503. [2021-07-09 18:12:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.139442231075697) internal successors, (1074), 502 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1074 transitions. [2021-07-09 18:12:39,063 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1074 transitions. Word has length 47 [2021-07-09 18:12:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:39,063 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1074 transitions. [2021-07-09 18:12:39,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1074 transitions. [2021-07-09 18:12:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:39,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:39,063 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:39,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:39,264 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:39,264 INFO L82 PathProgramCache]: Analyzing trace with hash 502819109, now seen corresponding path program 199 times [2021-07-09 18:12:39,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:39,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651313983] [2021-07-09 18:12:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:39,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:39,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651313983] [2021-07-09 18:12:39,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651313983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:39,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065729567] [2021-07-09 18:12:39,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:39,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:39,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:40,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065729567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:40,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:40,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:40,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226558891] [2021-07-09 18:12:40,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:40,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:40,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:40,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:40,245 INFO L87 Difference]: Start difference. First operand 503 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:44,065 INFO L93 Difference]: Finished difference Result 963 states and 1875 transitions. [2021-07-09 18:12:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-09 18:12:44,065 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:44,066 INFO L225 Difference]: With dead ends: 963 [2021-07-09 18:12:44,066 INFO L226 Difference]: Without dead ends: 918 [2021-07-09 18:12:44,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7057 ImplicationChecksByTransitivity, 3718.4ms TimeCoverageRelationStatistics Valid=2494, Invalid=19262, Unknown=0, NotChecked=0, Total=21756 [2021-07-09 18:12:44,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-07-09 18:12:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 505. [2021-07-09 18:12:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.140873015873016) internal successors, (1079), 504 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1079 transitions. [2021-07-09 18:12:44,073 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1079 transitions. Word has length 47 [2021-07-09 18:12:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:44,073 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1079 transitions. [2021-07-09 18:12:44,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1079 transitions. [2021-07-09 18:12:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:44,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:44,074 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:44,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-09 18:12:44,274 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:44,274 INFO L82 PathProgramCache]: Analyzing trace with hash -762108751, now seen corresponding path program 200 times [2021-07-09 18:12:44,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:44,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733762067] [2021-07-09 18:12:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:44,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:44,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733762067] [2021-07-09 18:12:44,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733762067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:44,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986028452] [2021-07-09 18:12:44,635 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:44,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:44,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:44,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:45,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986028452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:45,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:45,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:45,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166557132] [2021-07-09 18:12:45,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:45,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:45,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:45,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:45,248 INFO L87 Difference]: Start difference. First operand 505 states and 1079 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:48,860 INFO L93 Difference]: Finished difference Result 845 states and 1674 transitions. [2021-07-09 18:12:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:12:48,860 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:48,861 INFO L225 Difference]: With dead ends: 845 [2021-07-09 18:12:48,861 INFO L226 Difference]: Without dead ends: 825 [2021-07-09 18:12:48,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5942 ImplicationChecksByTransitivity, 3528.6ms TimeCoverageRelationStatistics Valid=2384, Invalid=16248, Unknown=0, NotChecked=0, Total=18632 [2021-07-09 18:12:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-09 18:12:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 493. [2021-07-09 18:12:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1260162601626016) internal successors, (1046), 492 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1046 transitions. [2021-07-09 18:12:48,868 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1046 transitions. Word has length 47 [2021-07-09 18:12:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:48,868 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1046 transitions. [2021-07-09 18:12:48,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1046 transitions. [2021-07-09 18:12:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:48,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:48,868 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:49,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:49,069 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1227950623, now seen corresponding path program 201 times [2021-07-09 18:12:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:49,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124004811] [2021-07-09 18:12:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:49,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:49,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124004811] [2021-07-09 18:12:49,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124004811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:49,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289244955] [2021-07-09 18:12:49,367 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:49,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 18:12:49,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:49,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:49,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289244955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:49,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:49,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488820180] [2021-07-09 18:12:49,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:49,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:49,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:49,974 INFO L87 Difference]: Start difference. First operand 493 states and 1046 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:54,447 INFO L93 Difference]: Finished difference Result 986 states and 1986 transitions. [2021-07-09 18:12:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-07-09 18:12:54,447 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:54,448 INFO L225 Difference]: With dead ends: 986 [2021-07-09 18:12:54,448 INFO L226 Difference]: Without dead ends: 938 [2021-07-09 18:12:54,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8617 ImplicationChecksByTransitivity, 4247.3ms TimeCoverageRelationStatistics Valid=2834, Invalid=22606, Unknown=0, NotChecked=0, Total=25440 [2021-07-09 18:12:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-07-09 18:12:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 509. [2021-07-09 18:12:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.127952755905512) internal successors, (1081), 508 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1081 transitions. [2021-07-09 18:12:54,455 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1081 transitions. Word has length 47 [2021-07-09 18:12:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:54,455 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1081 transitions. [2021-07-09 18:12:54,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1081 transitions. [2021-07-09 18:12:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:54,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:54,456 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:54,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:54,656 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1802088813, now seen corresponding path program 202 times [2021-07-09 18:12:54,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:54,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79840258] [2021-07-09 18:12:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:54,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:54,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79840258] [2021-07-09 18:12:54,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79840258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:54,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811356785] [2021-07-09 18:12:54,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:54,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:54,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:54,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:12:54,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:55,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811356785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:55,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:55,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-09 18:12:55,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435676985] [2021-07-09 18:12:55,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:12:55,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:12:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:12:55,564 INFO L87 Difference]: Start difference. First operand 509 states and 1081 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:59,368 INFO L93 Difference]: Finished difference Result 1017 states and 2034 transitions. [2021-07-09 18:12:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-09 18:12:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:12:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:59,370 INFO L225 Difference]: With dead ends: 1017 [2021-07-09 18:12:59,370 INFO L226 Difference]: Without dead ends: 969 [2021-07-09 18:12:59,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6758 ImplicationChecksByTransitivity, 3571.3ms TimeCoverageRelationStatistics Valid=2550, Invalid=18330, Unknown=0, NotChecked=0, Total=20880 [2021-07-09 18:12:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-07-09 18:12:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 506. [2021-07-09 18:12:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.120792079207921) internal successors, (1071), 505 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1071 transitions. [2021-07-09 18:12:59,377 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1071 transitions. Word has length 47 [2021-07-09 18:12:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:59,377 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1071 transitions. [2021-07-09 18:12:59,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1071 transitions. [2021-07-09 18:12:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:12:59,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:59,377 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:59,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:59,578 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:59,578 INFO L82 PathProgramCache]: Analyzing trace with hash 635930283, now seen corresponding path program 203 times [2021-07-09 18:12:59,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:59,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447061860] [2021-07-09 18:12:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:59,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:59,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447061860] [2021-07-09 18:12:59,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447061860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:59,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586271165] [2021-07-09 18:12:59,977 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:00,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 18:13:00,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:00,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:13:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:00,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586271165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:00,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:00,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2021-07-09 18:13:00,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569502227] [2021-07-09 18:13:00,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:13:00,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:00,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:13:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:13:00,651 INFO L87 Difference]: Start difference. First operand 506 states and 1071 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:08,287 INFO L93 Difference]: Finished difference Result 1005 states and 2058 transitions. [2021-07-09 18:13:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-07-09 18:13:08,287 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:13:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:08,288 INFO L225 Difference]: With dead ends: 1005 [2021-07-09 18:13:08,289 INFO L226 Difference]: Without dead ends: 979 [2021-07-09 18:13:08,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8517 ImplicationChecksByTransitivity, 6480.5ms TimeCoverageRelationStatistics Valid=1668, Invalid=22202, Unknown=0, NotChecked=0, Total=23870 [2021-07-09 18:13:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-07-09 18:13:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 479. [2021-07-09 18:13:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1297071129707112) internal successors, (1018), 478 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:08,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1018 transitions. [2021-07-09 18:13:08,295 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1018 transitions. Word has length 47 [2021-07-09 18:13:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:08,295 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1018 transitions. [2021-07-09 18:13:08,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1018 transitions. [2021-07-09 18:13:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-09 18:13:08,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:08,296 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:08,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-09 18:13:08,496 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash -820206049, now seen corresponding path program 204 times [2021-07-09 18:13:08,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:08,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832703347] [2021-07-09 18:13:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:13:08,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:08,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832703347] [2021-07-09 18:13:08,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832703347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:08,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51095707] [2021-07-09 18:13:08,578 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:08,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 18:13:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:13:08,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:13:08,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51095707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:08,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:08,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 18:13:08,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090132013] [2021-07-09 18:13:08,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:13:08,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:08,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:13:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:13:08,680 INFO L87 Difference]: Start difference. First operand 479 states and 1018 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) [2021-07-09 18:13:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:08,870 INFO L93 Difference]: Finished difference Result 794 states and 1629 transitions. [2021-07-09 18:13:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:13:08,870 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 49 [2021-07-09 18:13:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:08,871 INFO L225 Difference]: With dead ends: 794 [2021-07-09 18:13:08,871 INFO L226 Difference]: Without dead ends: 719 [2021-07-09 18:13:08,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:13:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-07-09 18:13:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 539. [2021-07-09 18:13:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.1282527881040894) internal successors, (1145), 538 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1145 transitions. [2021-07-09 18:13:08,876 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1145 transitions. Word has length 49 [2021-07-09 18:13:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:08,876 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1145 transitions. [2021-07-09 18:13:08,876 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) [2021-07-09 18:13:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1145 transitions. [2021-07-09 18:13:08,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-09 18:13:08,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:08,877 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:09,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:09,077 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash -300420567, now seen corresponding path program 205 times [2021-07-09 18:13:09,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:09,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747937490] [2021-07-09 18:13:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:09,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:09,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747937490] [2021-07-09 18:13:09,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747937490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:09,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682674990] [2021-07-09 18:13:09,516 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:09,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2021-07-09 18:13:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:10,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682674990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:10,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:10,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-07-09 18:13:10,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233065263] [2021-07-09 18:13:10,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:13:10,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:10,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:13:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:13:10,286 INFO L87 Difference]: Start difference. First operand 539 states and 1145 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:17,621 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-09 18:13:18,895 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-09 18:13:22,633 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-09 18:13:22,789 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-09 18:13:25,016 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-07-09 18:13:25,195 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-07-09 18:13:25,399 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-07-09 18:13:25,578 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-07-09 18:13:27,540 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-07-09 18:13:27,803 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-07-09 18:13:27,998 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-07-09 18:13:28,226 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-07-09 18:13:28,897 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2021-07-09 18:13:31,787 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-07-09 18:13:35,455 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-09 18:13:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:45,910 INFO L93 Difference]: Finished difference Result 4196 states and 8343 transitions. [2021-07-09 18:13:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2021-07-09 18:13:45,910 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-09 18:13:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:45,915 INFO L225 Difference]: With dead ends: 4196 [2021-07-09 18:13:45,915 INFO L226 Difference]: Without dead ends: 4128 [2021-07-09 18:13:45,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 481 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107198 ImplicationChecksByTransitivity, 30839.7ms TimeCoverageRelationStatistics Valid=25835, Invalid=206971, Unknown=0, NotChecked=0, Total=232806 [2021-07-09 18:13:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-07-09 18:13:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 953. [2021-07-09 18:13:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.1449579831932772) internal successors, (2042), 952 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2042 transitions. [2021-07-09 18:13:45,972 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2042 transitions. Word has length 49 [2021-07-09 18:13:45,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:45,972 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2042 transitions. [2021-07-09 18:13:45,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2042 transitions. [2021-07-09 18:13:45,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-09 18:13:45,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:45,973 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:46,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-09 18:13:46,174 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:46,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:46,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1788875737, now seen corresponding path program 206 times [2021-07-09 18:13:46,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:46,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465995338] [2021-07-09 18:13:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:13:46,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:46,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465995338] [2021-07-09 18:13:46,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465995338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:46,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367018481] [2021-07-09 18:13:46,580 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:46,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:46,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:46,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-09 18:13:46,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:47,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367018481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:47,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:47,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-07-09 18:13:47,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576004500] [2021-07-09 18:13:47,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 18:13:47,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:47,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 18:13:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:13:47,356 INFO L87 Difference]: Start difference. First operand 953 states and 2042 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:51,774 INFO L93 Difference]: Finished difference Result 1583 states and 3270 transitions. [2021-07-09 18:13:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-07-09 18:13:51,775 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-09 18:13:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:51,776 INFO L225 Difference]: With dead ends: 1583 [2021-07-09 18:13:51,776 INFO L226 Difference]: Without dead ends: 1535 [2021-07-09 18:13:51,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5681 ImplicationChecksByTransitivity, 3712.8ms TimeCoverageRelationStatistics Valid=965, Invalid=16591, Unknown=0, NotChecked=0, Total=17556 [2021-07-09 18:13:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-07-09 18:13:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 875. [2021-07-09 18:13:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.151029748283753) internal successors, (1880), 874 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1880 transitions. [2021-07-09 18:13:51,788 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1880 transitions. Word has length 49 [2021-07-09 18:13:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:51,788 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1880 transitions. [2021-07-09 18:13:51,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1880 transitions. [2021-07-09 18:13:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:13:51,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:51,789 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:51,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-09 18:13:51,990 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 207 times [2021-07-09 18:13:51,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:51,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976111390] [2021-07-09 18:13:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:52,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:52,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976111390] [2021-07-09 18:13:52,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976111390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:52,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509113080] [2021-07-09 18:13:52,366 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:52,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 18:13:52,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:52,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-09 18:13:52,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:53,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509113080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:53,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:53,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-09 18:13:53,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489051886] [2021-07-09 18:13:53,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:13:53,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:53,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:13:53,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:13:53,029 INFO L87 Difference]: Start difference. First operand 875 states and 1880 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:55,968 INFO L93 Difference]: Finished difference Result 1900 states and 4012 transitions. [2021-07-09 18:13:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:13:55,968 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:13:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:55,970 INFO L225 Difference]: With dead ends: 1900 [2021-07-09 18:13:55,970 INFO L226 Difference]: Without dead ends: 1815 [2021-07-09 18:13:55,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 3020.2ms TimeCoverageRelationStatistics Valid=1932, Invalid=13568, Unknown=0, NotChecked=0, Total=15500 [2021-07-09 18:13:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-07-09 18:13:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1155. [2021-07-09 18:13:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.2435008665511265) internal successors, (2589), 1154 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2589 transitions. [2021-07-09 18:13:55,983 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2589 transitions. Word has length 51 [2021-07-09 18:13:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:55,983 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2589 transitions. [2021-07-09 18:13:55,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:55,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2589 transitions. [2021-07-09 18:13:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:13:55,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:55,984 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:56,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-09 18:13:56,185 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1942809299, now seen corresponding path program 208 times [2021-07-09 18:13:56,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:56,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748664368] [2021-07-09 18:13:56,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:56,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748664368] [2021-07-09 18:13:56,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748664368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867189936] [2021-07-09 18:13:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:56,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:56,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:56,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-09 18:13:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867189936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:57,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:57,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-09 18:13:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082642093] [2021-07-09 18:13:57,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:13:57,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:57,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:13:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:13:57,174 INFO L87 Difference]: Start difference. First operand 1155 states and 2589 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:00,229 INFO L93 Difference]: Finished difference Result 1950 states and 4095 transitions. [2021-07-09 18:14:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:14:00,230 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:14:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:00,232 INFO L225 Difference]: With dead ends: 1950 [2021-07-09 18:14:00,232 INFO L226 Difference]: Without dead ends: 1876 [2021-07-09 18:14:00,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 3080.6ms TimeCoverageRelationStatistics Valid=2016, Invalid=14754, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:14:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-07-09 18:14:00,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1157. [2021-07-09 18:14:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2430795847750864) internal successors, (2593), 1156 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2593 transitions. [2021-07-09 18:14:00,248 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2593 transitions. Word has length 51 [2021-07-09 18:14:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:00,248 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2593 transitions. [2021-07-09 18:14:00,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2593 transitions. [2021-07-09 18:14:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:14:00,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:00,249 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:00,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-07-09 18:14:00,450 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:00,450 INFO L82 PathProgramCache]: Analyzing trace with hash -539398377, now seen corresponding path program 209 times [2021-07-09 18:14:00,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:00,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775159283] [2021-07-09 18:14:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:00,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:00,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775159283] [2021-07-09 18:14:00,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775159283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:00,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228322269] [2021-07-09 18:14:00,780 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:00,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 18:14:00,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:00,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-09 18:14:00,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:01,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228322269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:01,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:01,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-09 18:14:01,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460262987] [2021-07-09 18:14:01,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 18:14:01,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:01,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 18:14:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2283, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:14:01,449 INFO L87 Difference]: Start difference. First operand 1157 states and 2593 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 18:14:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:14:02,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:02,946 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:14:02,948 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:14:02,949 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:14:02,950 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:14:02 BasicIcfg [2021-07-09 18:14:02,950 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:14:02,950 INFO L168 Benchmark]: Toolchain (without parser) took 725512.78 ms. Allocated memory was 178.3 MB in the beginning and 923.8 MB in the end (delta: 745.5 MB). Free memory was 159.0 MB in the beginning and 574.5 MB in the end (delta: -415.5 MB). Peak memory consumption was 332.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:14:02,950 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 178.3 MB. Free memory is still 160.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:14:02,950 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.40 ms. Allocated memory is still 178.3 MB. Free memory was 158.9 MB in the beginning and 157.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:14:02,950 INFO L168 Benchmark]: Boogie Preprocessor took 14.47 ms. Allocated memory is still 178.3 MB. Free memory was 157.5 MB in the beginning and 156.6 MB in the end (delta: 896.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:14:02,950 INFO L168 Benchmark]: RCFGBuilder took 275.91 ms. Allocated memory is still 178.3 MB. Free memory was 156.5 MB in the beginning and 145.0 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 18:14:02,950 INFO L168 Benchmark]: TraceAbstraction took 725191.59 ms. Allocated memory was 178.3 MB in the beginning and 923.8 MB in the end (delta: 745.5 MB). Free memory was 144.6 MB in the beginning and 574.5 MB in the end (delta: -429.9 MB). Peak memory consumption was 316.4 MB. Max. memory is 8.0 GB. [2021-07-09 18:14:02,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 178.3 MB. Free memory is still 160.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.40 ms. Allocated memory is still 178.3 MB. Free memory was 158.9 MB in the beginning and 157.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.47 ms. Allocated memory is still 178.3 MB. Free memory was 157.5 MB in the beginning and 156.6 MB in the end (delta: 896.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 275.91 ms. Allocated memory is still 178.3 MB. Free memory was 156.5 MB in the beginning and 145.0 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 725191.59 ms. Allocated memory was 178.3 MB in the beginning and 923.8 MB in the end (delta: 745.5 MB). Free memory was 144.6 MB in the beginning and 574.5 MB in the end (delta: -429.9 MB). Peak memory consumption was 316.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1157states) and FLOYD_HOARE automaton (currently 59 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 87 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 725047.8ms, OverallIterations: 211, TraceHistogramMax: 9, EmptinessCheckTime: 146.3ms, AutomataDifference: 534655.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9644 SDtfs, 57099 SDslu, 150821 SDs, 0 SdLazy, 352082 SolverSat, 16777 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 113187.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24241 GetRequests, 4093 SyntacticMatches, 254 SemanticMatches, 19893 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807646 ImplicationChecksByTransitivity, 504480.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1157occurred in iteration=210, InterpolantAutomatonStates: 16057, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1407.8ms AutomataMinimizationTime, 210 MinimizatonAttempts, 71238 StatesRemovedByMinimization, 210 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 575.7ms SsaConstructionTime, 2782.5ms SatisfiabilityAnalysisTime, 138550.3ms InterpolantComputationTime, 15174 NumberOfCodeBlocks, 15174 NumberOfCodeBlocksAsserted, 1049 NumberOfCheckSat, 14754 ConstructedInterpolants, 0 QuantifiedInterpolants, 220929 SizeOfPredicates, 1015 NumberOfNonLiveVariables, 16942 ConjunctsInSsa, 10432 ConjunctsInUnsatCore, 420 InterpolantComputations, 2 PerfectInterpolantSequences, 4031/27917 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