/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:37:55,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:37:55,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:37:55,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:37:55,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:37:55,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:37:55,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:37:55,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:37:55,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:37:55,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:37:55,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:37:55,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:37:55,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:37:55,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:37:55,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:37:55,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:37:55,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:37:55,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:37:55,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:37:55,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:37:55,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:37:56,007 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:37:56,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:37:56,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:37:56,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:37:56,009 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:37:56,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:37:56,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:37:56,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:37:56,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:37:56,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:37:56,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:37:56,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:37:56,011 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:37:56,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:37:56,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:37:56,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:37:56,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:37:56,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:37:56,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:37:56,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:37:56,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:37:56,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:37:56,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:37:56,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:37:56,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:37:56,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:37:56,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:37:56,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:37:56,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:37:56,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:37:56,461 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:37:56,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound20.c [2020-12-22 05:37:56,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/404833727/40b25d7f52d34dcaa5c5bbac8420c443/FLAGa23a708af [2020-12-22 05:37:57,110 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:37:57,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound20.c [2020-12-22 05:37:57,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/404833727/40b25d7f52d34dcaa5c5bbac8420c443/FLAGa23a708af [2020-12-22 05:37:57,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/404833727/40b25d7f52d34dcaa5c5bbac8420c443 [2020-12-22 05:37:57,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:37:57,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:37:57,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:37:57,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:37:57,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:37:57,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58162922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57, skipping insertion in model container [2020-12-22 05:37:57,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:37:57,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:37:57,676 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound20.c[524,537] [2020-12-22 05:37:57,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:37:57,705 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:37:57,719 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound20.c[524,537] [2020-12-22 05:37:57,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:37:57,751 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:37:57,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57 WrapperNode [2020-12-22 05:37:57,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:37:57,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:37:57,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:37:57,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:37:57,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:37:57,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:37:57,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:37:57,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:37:57,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (1/1) ... [2020-12-22 05:37:57,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:37:57,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:37:57,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:37:57,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:37:57,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (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 [2020-12-22 05:37:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:37:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:37:57,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:37:57,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:37:58,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:37:58,323 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 05:37:58,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:58 BoogieIcfgContainer [2020-12-22 05:37:58,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:37:58,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:37:58,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:37:58,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:37:58,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:37:57" (1/3) ... [2020-12-22 05:37:58,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4043a27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:37:58, skipping insertion in model container [2020-12-22 05:37:58,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:57" (2/3) ... [2020-12-22 05:37:58,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4043a27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:37:58, skipping insertion in model container [2020-12-22 05:37:58,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:58" (3/3) ... [2020-12-22 05:37:58,357 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound20.c [2020-12-22 05:37:58,365 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:37:58,370 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:37:58,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:37:58,439 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:37:58,439 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:37:58,439 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:37:58,439 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:37:58,439 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:37:58,440 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:37:58,440 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:37:58,440 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:37:58,459 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-22 05:37:58,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:37:58,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:58,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:58,466 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2020-12-22 05:37:58,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:58,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440960021] [2020-12-22 05:37:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:58,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440960021] [2020-12-22 05:37:58,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:58,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:37:58,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140611861] [2020-12-22 05:37:58,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:37:58,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:58,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:37:58,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:37:58,731 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-12-22 05:37:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:58,754 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2020-12-22 05:37:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:37:58,755 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-22 05:37:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:58,780 INFO L225 Difference]: With dead ends: 53 [2020-12-22 05:37:58,781 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 05:37:58,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:37:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 05:37:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 05:37:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:37:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-22 05:37:58,827 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2020-12-22 05:37:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:58,828 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-22 05:37:58,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:37:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-22 05:37:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:37:58,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:58,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:58,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:37:58,831 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:58,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2020-12-22 05:37:58,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:58,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83156752] [2020-12-22 05:37:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:58,881 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:58,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677861635] [2020-12-22 05:37:58,882 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 [2020-12-22 05:37:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:58,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:37:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:59,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83156752] [2020-12-22 05:37:59,110 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:59,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677861635] [2020-12-22 05:37:59,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:59,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:37:59,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252069795] [2020-12-22 05:37:59,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:37:59,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:37:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:37:59,114 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-12-22 05:37:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:59,338 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-12-22 05:37:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:37:59,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 05:37:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:59,342 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:37:59,342 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 05:37:59,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:37:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 05:37:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2020-12-22 05:37:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 05:37:59,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-22 05:37:59,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2020-12-22 05:37:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:59,366 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-22 05:37:59,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:37:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-22 05:37:59,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:37:59,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:59,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:59,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:37:59,583 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash -937517175, now seen corresponding path program 1 times [2020-12-22 05:37:59,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:59,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101178126] [2020-12-22 05:37:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:59,618 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:59,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646267082] [2020-12-22 05:37:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:59,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 05:37:59,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:59,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:06,556 WARN L197 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 05:38:06,682 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:06,685 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:38:06,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:06,697 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:38:06,702 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:38:06,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:38:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:06,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101178126] [2020-12-22 05:38:06,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:06,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646267082] [2020-12-22 05:38:06,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:38:06,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 05:38:06,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113780689] [2020-12-22 05:38:06,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 05:38:06,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 05:38:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:38:06,810 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2020-12-22 05:38:07,234 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-12-22 05:38:10,128 WARN L197 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-22 05:38:10,373 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-12-22 05:38:10,626 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2020-12-22 05:38:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:10,980 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-22 05:38:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 05:38:10,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-12-22 05:38:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:10,982 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:38:10,982 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 05:38:10,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-12-22 05:38:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 05:38:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-22 05:38:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 05:38:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-22 05:38:10,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2020-12-22 05:38:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:10,989 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-22 05:38:10,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 05:38:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-22 05:38:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:38:10,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:10,990 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:11,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:11,203 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1003041614, now seen corresponding path program 1 times [2020-12-22 05:38:11,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:11,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398517212] [2020-12-22 05:38:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:11,221 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:11,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451956048] [2020-12-22 05:38:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:38:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:11,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 05:38:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:11,609 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:11,619 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:11,654 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:38:11,662 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:38:11,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:11,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:38:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:12,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398517212] [2020-12-22 05:38:12,065 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:12,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451956048] [2020-12-22 05:38:12,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:12,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:38:12,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584886255] [2020-12-22 05:38:12,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:38:12,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:38:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:38:12,068 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-12-22 05:38:12,657 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-12-22 05:38:12,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:12,735 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-12-22 05:38:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:38:12,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-22 05:38:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:12,738 INFO L225 Difference]: With dead ends: 47 [2020-12-22 05:38:12,738 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 05:38:12,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:38:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 05:38:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2020-12-22 05:38:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:38:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-22 05:38:12,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2020-12-22 05:38:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:12,748 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-22 05:38:12,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:38:12,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-22 05:38:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:38:12,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:12,750 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:12,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:12,965 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1032048289, now seen corresponding path program 1 times [2020-12-22 05:38:12,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:12,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676025554] [2020-12-22 05:38:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:12,981 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:12,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666873698] [2020-12-22 05:38:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:38:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 05:38:13,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:13,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676025554] [2020-12-22 05:38:13,210 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:13,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666873698] [2020-12-22 05:38:13,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:13,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:38:13,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718827264] [2020-12-22 05:38:13,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:38:13,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:38:13,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:38:13,212 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2020-12-22 05:38:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:19,817 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-12-22 05:38:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:38:19,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 05:38:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:19,819 INFO L225 Difference]: With dead ends: 49 [2020-12-22 05:38:19,822 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 05:38:19,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:38:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 05:38:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2020-12-22 05:38:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 05:38:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-22 05:38:19,835 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2020-12-22 05:38:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:19,837 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-22 05:38:19,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:38:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-22 05:38:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:38:19,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:19,838 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:20,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:20,040 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:20,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1931404169, now seen corresponding path program 1 times [2020-12-22 05:38:20,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:20,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264771802] [2020-12-22 05:38:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:20,054 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:20,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421430000] [2020-12-22 05:38:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 05:38:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:24,388 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-22 05:38:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264771802] [2020-12-22 05:38:24,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:24,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421430000] [2020-12-22 05:38:24,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:24,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:38:24,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604153515] [2020-12-22 05:38:24,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:38:24,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:38:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:38:24,488 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2020-12-22 05:38:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:25,014 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-12-22 05:38:25,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:38:25,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 05:38:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:25,016 INFO L225 Difference]: With dead ends: 63 [2020-12-22 05:38:25,016 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 05:38:25,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:38:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 05:38:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-12-22 05:38:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 05:38:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-22 05:38:25,024 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 17 [2020-12-22 05:38:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:25,024 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-22 05:38:25,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:38:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-22 05:38:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:38:25,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:25,026 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:25,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:38:25,227 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1931463751, now seen corresponding path program 1 times [2020-12-22 05:38:25,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:25,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003958308] [2020-12-22 05:38:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:25,249 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:25,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200900927] [2020-12-22 05:38:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:25,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 05:38:25,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:25,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003958308] [2020-12-22 05:38:25,571 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:25,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200900927] [2020-12-22 05:38:25,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:25,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:38:25,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912803272] [2020-12-22 05:38:25,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:38:25,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:25,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:38:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:38:25,573 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 8 states. [2020-12-22 05:38:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:25,902 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-12-22 05:38:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:38:25,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 05:38:25,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:25,906 INFO L225 Difference]: With dead ends: 55 [2020-12-22 05:38:25,906 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 05:38:25,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:38:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 05:38:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2020-12-22 05:38:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 05:38:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-22 05:38:25,920 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 17 [2020-12-22 05:38:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:25,920 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-22 05:38:25,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:38:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-22 05:38:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:38:25,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:25,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:26,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:26,123 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1530166964, now seen corresponding path program 1 times [2020-12-22 05:38:26,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:26,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304947742] [2020-12-22 05:38:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:26,135 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:26,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315627023] [2020-12-22 05:38:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-12-22 05:38:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:26,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 05:38:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:26,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304947742] [2020-12-22 05:38:26,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:26,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315627023] [2020-12-22 05:38:26,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:38:26,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:38:26,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256500326] [2020-12-22 05:38:26,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:38:26,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:38:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:38:26,389 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 8 states. [2020-12-22 05:38:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:26,758 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-12-22 05:38:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:38:26,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-22 05:38:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:26,760 INFO L225 Difference]: With dead ends: 71 [2020-12-22 05:38:26,760 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 05:38:26,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:38:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 05:38:26,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2020-12-22 05:38:26,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 05:38:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-12-22 05:38:26,779 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 18 [2020-12-22 05:38:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:26,779 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-12-22 05:38:26,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:38:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-12-22 05:38:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:38:26,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:26,781 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:26,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:26,990 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash 191838595, now seen corresponding path program 2 times [2020-12-22 05:38:26,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:26,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667186315] [2020-12-22 05:38:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:27,010 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:27,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135295970] [2020-12-22 05:38:27,011 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 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 [2020-12-22 05:38:27,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:38:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:27,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 05:38:27,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:29,384 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 27 [2020-12-22 05:38:30,065 WARN L197 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-22 05:38:30,261 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-22 05:38:32,382 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0))) (and (<= 1 c_ULTIMATE.start_main_~y~0) (= c_ULTIMATE.start_main_~a~0 (div c_ULTIMATE.start_main_~x~0 2)) (= .cse0 (+ (* (div (* c_ULTIMATE.start_main_~p~0 (- 1)) (- 4)) c_ULTIMATE.start_main_~x~0 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~q~0)) (<= 0 c_ULTIMATE.start_main_~x~0) (not (= c_ULTIMATE.start_main_~x~0 0)) (<= (mod c_ULTIMATE.start_main_~x~0 2) 0) (= c_ULTIMATE.start_main_~b~0 (div c_ULTIMATE.start_main_~y~0 2)) (= c_ULTIMATE.start_main_~q~0 0) (<= (mod c_ULTIMATE.start_main_~y~0 2) 0) (let ((.cse1 (= .cse0 (+ (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~p~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~q~0)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse1)) (and .cse1 (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond)))) (<= c_ULTIMATE.start_main_~x~0 20) (= (mod (* c_ULTIMATE.start_main_~p~0 3) (- 4)) 0))) is different from false [2020-12-22 05:38:41,148 WARN L197 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 05:38:42,225 WARN L197 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-12-22 05:38:42,341 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:38:42,642 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 05:38:42,657 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 05:38:42,673 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 05:38:42,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 05:38:42,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-22 05:38:42,797 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 05:38:42,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-22 05:38:43,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:43,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:44,404 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:44,894 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:45,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:38:45,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:46,218 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:38:46,646 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:47,045 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:38:47,426 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:47,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:48,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:38:48,480 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 05:38:48,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 16 disjuncts [2020-12-22 05:38:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-12-22 05:38:49,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667186315] [2020-12-22 05:38:49,137 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:49,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135295970] [2020-12-22 05:38:49,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:49,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-22 05:38:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000383813] [2020-12-22 05:38:49,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 05:38:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 05:38:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=136, Unknown=2, NotChecked=24, Total=210 [2020-12-22 05:38:49,139 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 15 states. [2020-12-22 05:38:49,572 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-12-22 05:38:52,253 WARN L197 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2020-12-22 05:39:02,232 WARN L197 SmtUtils]: Spent 4.97 s on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 05:39:22,068 WARN L197 SmtUtils]: Spent 6.78 s on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-22 05:39:41,007 WARN L197 SmtUtils]: Spent 8.99 s on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-12-22 05:39:41,946 WARN L197 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 05:39:51,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:51,510 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-12-22 05:39:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:39:51,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 05:39:51,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:51,512 INFO L225 Difference]: With dead ends: 78 [2020-12-22 05:39:51,512 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 05:39:51,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 57.3s TimeCoverageRelationStatistics Valid=168, Invalid=429, Unknown=7, NotChecked=46, Total=650 [2020-12-22 05:39:51,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 05:39:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2020-12-22 05:39:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 05:39:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-12-22 05:39:51,524 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 19 [2020-12-22 05:39:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:51,524 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-12-22 05:39:51,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 05:39:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-12-22 05:39:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:39:51,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:51,525 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:51,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 05:39:51,740 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:51,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1915371903, now seen corresponding path program 1 times [2020-12-22 05:39:51,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:51,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319274627] [2020-12-22 05:39:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:51,751 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:51,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553544880] [2020-12-22 05:39:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:39:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:39:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 05:39:51,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:52,104 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2020-12-22 05:39:52,111 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-12-22 05:39:52,112 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:39:52,189 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:39:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:52,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319274627] [2020-12-22 05:39:52,241 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553544880] [2020-12-22 05:39:52,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:39:52,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 05:39:52,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075221648] [2020-12-22 05:39:52,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:39:52,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:39:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:39:52,244 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 9 states. [2020-12-22 05:39:52,567 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2020-12-22 05:39:57,086 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-12-22 05:39:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:57,103 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2020-12-22 05:39:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:39:57,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-22 05:39:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:57,109 INFO L225 Difference]: With dead ends: 72 [2020-12-22 05:39:57,109 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 05:39:57,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-12-22 05:39:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 05:39:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2020-12-22 05:39:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 05:39:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2020-12-22 05:39:57,125 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 19 [2020-12-22 05:39:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:57,125 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2020-12-22 05:39:57,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:39:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2020-12-22 05:39:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:39:57,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:57,126 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:57,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:57,328 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:57,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1654558476, now seen corresponding path program 1 times [2020-12-22 05:39:57,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:57,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462957532] [2020-12-22 05:39:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:57,339 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:57,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319323089] [2020-12-22 05:39:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:39:57,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 05:39:57,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:57,767 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 05:39:58,000 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 05:39:58,240 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 05:39:58,287 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:39:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:58,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462957532] [2020-12-22 05:39:58,433 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:58,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319323089] [2020-12-22 05:39:58,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:58,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-22 05:39:58,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299819084] [2020-12-22 05:39:58,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 05:39:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 05:39:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:39:58,440 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 12 states. [2020-12-22 05:39:58,856 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-12-22 05:39:59,139 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 05:39:59,548 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-12-22 05:40:00,138 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 05:40:00,570 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-12-22 05:40:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:00,716 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2020-12-22 05:40:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 05:40:00,717 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-12-22 05:40:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:00,718 INFO L225 Difference]: With dead ends: 97 [2020-12-22 05:40:00,718 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 05:40:00,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-12-22 05:40:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 05:40:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-12-22 05:40:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 05:40:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2020-12-22 05:40:00,731 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 20 [2020-12-22 05:40:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:00,731 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2020-12-22 05:40:00,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 05:40:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2020-12-22 05:40:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:40:00,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:00,732 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:00,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:00,935 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 754316118, now seen corresponding path program 2 times [2020-12-22 05:40:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:00,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237773554] [2020-12-22 05:40:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:00,958 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:00,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622141333] [2020-12-22 05:40:00,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 05:40:01,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:40:01,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:01,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 05:40:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:01,562 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2020-12-22 05:40:02,751 WARN L197 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-12-22 05:40:03,024 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-12-22 05:40:03,038 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:40:03,041 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:40:03,045 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:40:03,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:40:03,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:40:03,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 05:40:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:03,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237773554] [2020-12-22 05:40:03,326 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:03,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622141333] [2020-12-22 05:40:03,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:03,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-22 05:40:03,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353481923] [2020-12-22 05:40:03,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 05:40:03,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:03,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 05:40:03,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:40:03,329 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand 16 states. [2020-12-22 05:40:03,712 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-12-22 05:40:03,855 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2020-12-22 05:40:04,010 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2020-12-22 05:40:04,324 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2020-12-22 05:40:04,677 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-12-22 05:40:04,858 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2020-12-22 05:40:05,061 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-12-22 05:40:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:05,269 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2020-12-22 05:40:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:40:05,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 05:40:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:05,271 INFO L225 Difference]: With dead ends: 113 [2020-12-22 05:40:05,271 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 05:40:05,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-12-22 05:40:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 05:40:05,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-12-22 05:40:05,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 05:40:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2020-12-22 05:40:05,283 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 20 [2020-12-22 05:40:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:05,284 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2020-12-22 05:40:05,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 05:40:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2020-12-22 05:40:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:40:05,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:05,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:05,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 05:40:05,493 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1210343271, now seen corresponding path program 1 times [2020-12-22 05:40:05,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:05,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304322144] [2020-12-22 05:40:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:05,504 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:05,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584921468] [2020-12-22 05:40:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 05:40:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:05,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:40:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:05,926 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2020-12-22 05:40:05,933 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-22 05:40:05,933 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:40:06,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:40:06,044 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:40:06,046 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:40:06,046 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:40:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:06,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304322144] [2020-12-22 05:40:06,112 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:06,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584921468] [2020-12-22 05:40:06,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:06,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 05:40:06,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974211869] [2020-12-22 05:40:06,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 05:40:06,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:06,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 05:40:06,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:40:06,114 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand 11 states. [2020-12-22 05:40:06,509 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-12-22 05:40:06,748 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2020-12-22 05:40:07,142 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 05:40:11,516 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-12-22 05:40:11,778 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2020-12-22 05:40:12,230 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-12-22 05:40:12,490 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-12-22 05:40:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:12,495 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2020-12-22 05:40:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 05:40:12,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-22 05:40:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:12,498 INFO L225 Difference]: With dead ends: 105 [2020-12-22 05:40:12,498 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 05:40:12,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-12-22 05:40:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 05:40:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2020-12-22 05:40:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 05:40:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-12-22 05:40:12,510 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 20 [2020-12-22 05:40:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:12,511 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-12-22 05:40:12,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 05:40:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-12-22 05:40:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:40:12,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:12,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:12,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 05:40:12,717 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash 564664091, now seen corresponding path program 1 times [2020-12-22 05:40:12,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:12,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629752429] [2020-12-22 05:40:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:12,728 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:12,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403909828] [2020-12-22 05:40:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-12-22 05:40:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:12,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 05:40:12,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:13,717 WARN L197 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 05:40:13,735 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 10, 1] term [2020-12-22 05:40:13,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:40:13,906 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-22 05:40:13,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:40:13,913 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:40:13,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:40:13,918 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:40:13,919 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:40:13,920 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 05:40:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:14,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629752429] [2020-12-22 05:40:14,019 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:14,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403909828] [2020-12-22 05:40:14,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 05:40:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880863418] [2020-12-22 05:40:14,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 05:40:14,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 05:40:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:40:14,021 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 13 states. [2020-12-22 05:40:14,389 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-12-22 05:40:15,130 WARN L197 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-12-22 05:40:15,443 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-12-22 05:40:17,699 WARN L197 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2020-12-22 05:40:18,325 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 05:40:18,726 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-12-22 05:40:18,937 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2020-12-22 05:40:19,259 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2020-12-22 05:40:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:19,305 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-12-22 05:40:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 05:40:19,306 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-12-22 05:40:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:19,306 INFO L225 Difference]: With dead ends: 82 [2020-12-22 05:40:19,307 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 05:40:19,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-12-22 05:40:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 05:40:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2020-12-22 05:40:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 05:40:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-12-22 05:40:19,318 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 20 [2020-12-22 05:40:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:19,319 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-12-22 05:40:19,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 05:40:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-12-22 05:40:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 05:40:19,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:19,320 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:19,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 05:40:19,533 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash -245616514, now seen corresponding path program 1 times [2020-12-22 05:40:19,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:19,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304698124] [2020-12-22 05:40:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:19,547 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:19,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994590832] [2020-12-22 05:40:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:19,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 05:40:19,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:20,105 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 05:40:20,386 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-12-22 05:40:22,502 WARN L197 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-12-22 05:40:22,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304698124] [2020-12-22 05:40:22,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:22,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994590832] [2020-12-22 05:40:22,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-22 05:40:22,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:22,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:40:22,520 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:40:22,520 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:40:22,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:22,755 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:40:22,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:40:22 BoogieIcfgContainer [2020-12-22 05:40:22,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:40:22,758 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:40:22,758 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:40:22,758 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:40:22,759 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:58" (3/4) ... [2020-12-22 05:40:22,765 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:40:22,765 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:40:22,766 INFO L168 Benchmark]: Toolchain (without parser) took 145274.85 ms. Allocated memory was 151.0 MB in the beginning and 201.3 MB in the end (delta: 50.3 MB). Free memory was 125.4 MB in the beginning and 173.6 MB in the end (delta: -48.2 MB). Peak memory consumption was 3.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:22,766 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:40:22,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.20 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 115.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:22,770 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.98 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:22,770 INFO L168 Benchmark]: Boogie Preprocessor took 50.51 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 112.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:22,771 INFO L168 Benchmark]: RCFGBuilder took 480.63 ms. Allocated memory is still 151.0 MB. Free memory was 112.2 MB in the beginning and 131.3 MB in the end (delta: -19.1 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:22,772 INFO L168 Benchmark]: TraceAbstraction took 144420.12 ms. Allocated memory was 151.0 MB in the beginning and 201.3 MB in the end (delta: 50.3 MB). Free memory was 130.8 MB in the beginning and 174.1 MB in the end (delta: -43.3 MB). Peak memory consumption was 121.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:22,773 INFO L168 Benchmark]: Witness Printer took 6.92 ms. Allocated memory is still 201.3 MB. Free memory was 174.1 MB in the beginning and 173.6 MB in the end (delta: 516.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:40:22,778 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 259.20 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 115.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.98 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.51 ms. Allocated memory is still 151.0 MB. Free memory was 113.5 MB in the beginning and 112.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 480.63 ms. Allocated memory is still 151.0 MB. Free memory was 112.2 MB in the beginning and 131.3 MB in the end (delta: -19.1 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 144420.12 ms. Allocated memory was 151.0 MB in the beginning and 201.3 MB in the end (delta: 50.3 MB). Free memory was 130.8 MB in the beginning and 174.1 MB in the end (delta: -43.3 MB). Peak memory consumption was 121.3 MB. Max. memory is 8.0 GB. * Witness Printer took 6.92 ms. Allocated memory is still 201.3 MB. Free memory was 174.1 MB in the beginning and 173.6 MB in the end (delta: 516.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L29] a = x [L30] b = y [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L37] COND FALSE !(!(a != 0 && b != 0)) [L40] COND TRUE a % 2 == 0 && b % 2 == 0 [L41] a = a / 2 [L42] b = b / 2 [L43] p = 4 * p [L34] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L37] COND FALSE !(!(a != 0 && b != 0)) [L40] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L44] COND FALSE !(a % 2 == 1 && b % 2 == 0) [L47] COND TRUE a % 2 == 0 && b % 2 == 1 [L48] b = b - 1 [L49] q = q + a * p [L34] COND TRUE 1 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 144.3s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 96.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 218 SDtfs, 1328 SDslu, 634 SDs, 0 SdLazy, 1590 SolverSat, 392 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 37.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 314 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 207 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 89.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 206 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 40.5s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 223 ConstructedInterpolants, 4 QuantifiedInterpolants, 64825 SizeOfPredicates, 157 NumberOfNonLiveVariables, 1159 ConjunctsInSsa, 430 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 6/44 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: unable to determine feasibility of some traces Received shutdown request...