/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/ps6-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:46:09,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:46:09,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:46:09,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:46:09,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:46:09,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:46:09,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:46:09,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:46:09,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:46:09,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:46:09,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:46:09,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:46:09,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:46:09,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:46:09,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:46:09,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:46:09,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:46:09,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:46:09,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:46:09,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:46:09,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:46:09,775 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:46:09,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:46:09,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:46:09,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:46:09,778 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:46:09,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:46:09,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:46:09,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:46:09,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:46:09,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:46:09,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:46:09,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:46:09,780 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:46:09,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:46:09,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:46:09,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:46:09,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:46:09,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:46:09,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:46:09,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:46:09,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:46:09,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:46:09,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:46:09,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:46:09,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:46:09,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:46:10,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:46:10,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:46:10,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:46:10,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:46:10,245 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:46:10,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound5.c [2020-12-22 05:46:10,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0ba94a1/b74589036fab43b89682ec33260b06cb/FLAG70b2a1600 [2020-12-22 05:46:11,002 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:46:11,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound5.c [2020-12-22 05:46:11,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0ba94a1/b74589036fab43b89682ec33260b06cb/FLAG70b2a1600 [2020-12-22 05:46:11,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d0ba94a1/b74589036fab43b89682ec33260b06cb [2020-12-22 05:46:11,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:46:11,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:46:11,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:46:11,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:46:11,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:46:11,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de86b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11, skipping insertion in model container [2020-12-22 05:46:11,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:46:11,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:46:11,570 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/ps6-ll_unwindbound5.c[458,471] [2020-12-22 05:46:11,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:46:11,620 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:46:11,646 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/ps6-ll_unwindbound5.c[458,471] [2020-12-22 05:46:11,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:46:11,699 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:46:11,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11 WrapperNode [2020-12-22 05:46:11,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:46:11,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:46:11,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:46:11,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:46:11,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:46:11,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:46:11,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:46:11,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:46:11,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (1/1) ... [2020-12-22 05:46:11,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:46:11,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:46:11,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:46:11,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:46:11,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (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 05:46:11,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:46:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:46:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:46:11,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:46:12,486 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:46:12,487 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:46:12,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:46:12 BoogieIcfgContainer [2020-12-22 05:46:12,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:46:12,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:46:12,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:46:12,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:46:12,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:46:11" (1/3) ... [2020-12-22 05:46:12,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d15837c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:46:12, skipping insertion in model container [2020-12-22 05:46:12,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:46:11" (2/3) ... [2020-12-22 05:46:12,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d15837c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:46:12, skipping insertion in model container [2020-12-22 05:46:12,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:46:12" (3/3) ... [2020-12-22 05:46:12,517 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound5.c [2020-12-22 05:46:12,534 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:46:12,541 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:46:12,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:46:12,596 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:46:12,596 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:46:12,596 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:46:12,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:46:12,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:46:12,597 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:46:12,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:46:12,597 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:46:12,614 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 05:46:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:46:12,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:46:12,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:46:12,623 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:46:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:46:12,631 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2020-12-22 05:46:12,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:46:12,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173929908] [2020-12-22 05:46:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:46:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:46:12,822 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 05:46:12,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173929908] [2020-12-22 05:46:12,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:46:12,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:46:12,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934933023] [2020-12-22 05:46:12,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:46:12,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:46:12,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:46:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:46:12,851 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-22 05:46:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:46:12,872 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-12-22 05:46:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:46:12,874 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:46:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:46:12,885 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:46:12,885 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 05:46:12,889 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 05:46:12,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 05:46:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 05:46:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 05:46:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 05:46:12,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-12-22 05:46:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:46:12,928 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 05:46:12,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:46:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 05:46:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:46:12,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:46:12,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:46:12,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:46:12,930 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:46:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:46:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:46:12,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:46:12,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581035934] [2020-12-22 05:46:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:46:12,951 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:46:12,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211815201] [2020-12-22 05:46:12,951 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 05:46:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:46:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:46:13,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:46:13,186 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 05:46:13,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581035934] [2020-12-22 05:46:13,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:46:13,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211815201] [2020-12-22 05:46:13,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:46:13,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:46:13,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028858865] [2020-12-22 05:46:13,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:46:13,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:46:13,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:46:13,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:46:13,191 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-12-22 05:46:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:46:17,409 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-22 05:46:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:46:17,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 05:46:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:46:17,417 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:46:17,417 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 05:46:17,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:46:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 05:46:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-22 05:46:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:46:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 05:46:17,426 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-12-22 05:46:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:46:17,426 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 05:46:17,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:46:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 05:46:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:46:17,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:46:17,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:46:17,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:46:17,642 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:46:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:46:17,644 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2020-12-22 05:46:17,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:46:17,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441929806] [2020-12-22 05:46:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:46:17,670 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:46:17,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023123254] [2020-12-22 05:46:17,671 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 05:46:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:46:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:46:17,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:46:17,832 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 05:46:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441929806] [2020-12-22 05:46:17,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:46:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023123254] [2020-12-22 05:46:17,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:46:17,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:46:17,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157120374] [2020-12-22 05:46:17,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:46:17,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:46:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:46:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:46:17,836 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-12-22 05:46:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:46:18,123 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-22 05:46:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:46:18,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 05:46:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:46:18,125 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:46:18,125 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 05:46:18,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:46:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 05:46:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-22 05:46:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:46:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-22 05:46:18,135 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2020-12-22 05:46:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:46:18,136 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-22 05:46:18,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:46:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-22 05:46:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:46:18,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:46:18,137 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:46:18,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:46:18,352 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:46:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:46:18,354 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2020-12-22 05:46:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:46:18,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702317498] [2020-12-22 05:46:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:46:18,379 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:46:18,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836389971] [2020-12-22 05:46:18,380 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 05:46:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:46:18,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:46:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:46:18,531 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 05:46:18,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702317498] [2020-12-22 05:46:18,532 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:46:18,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836389971] [2020-12-22 05:46:18,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:46:18,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:46:18,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907024465] [2020-12-22 05:46:18,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:46:18,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:46:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:46:18,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:46:18,538 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-12-22 05:46:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:46:18,586 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 05:46:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:46:18,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 05:46:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:46:18,591 INFO L225 Difference]: With dead ends: 34 [2020-12-22 05:46:18,591 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:46:18,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:46:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:46:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 05:46:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:46:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 05:46:18,599 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-12-22 05:46:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:46:18,599 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 05:46:18,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:46:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 05:46:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:46:18,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:46:18,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:46:18,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:46:18,810 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:46:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:46:18,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2020-12-22 05:46:18,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:46:18,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585535189] [2020-12-22 05:46:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:46:18,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:46:18,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388772590] [2020-12-22 05:46:18,829 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 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 05:46:18,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:46:18,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:46:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:46:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:46:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:46:19,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585535189] [2020-12-22 05:46:19,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:46:19,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388772590] [2020-12-22 05:46:19,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:46:19,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:46:19,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114574608] [2020-12-22 05:46:19,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:46:19,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:46:19,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:46:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:46:19,091 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-12-22 05:46:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:46:19,393 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-22 05:46:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:46:19,394 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 05:46:19,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:46:19,395 INFO L225 Difference]: With dead ends: 49 [2020-12-22 05:46:19,395 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 05:46:19,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:46:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 05:46:19,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2020-12-22 05:46:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:46:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-22 05:46:19,404 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2020-12-22 05:46:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:46:19,404 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-22 05:46:19,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:46:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-22 05:46:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:46:19,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:46:19,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:46:19,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:46:19,613 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:46:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:46:19,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2020-12-22 05:46:19,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:46:19,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959317821] [2020-12-22 05:46:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:46:19,638 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:46:19,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993056319] [2020-12-22 05:46:19,644 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 05:46:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:46:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 05:46:19,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:46:19,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:46:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:46:19,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959317821] [2020-12-22 05:46:19,948 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:46:19,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993056319] [2020-12-22 05:46:19,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:46:19,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:46:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731964450] [2020-12-22 05:46:19,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:46:19,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:46:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:46:19,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:46:19,964 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2020-12-22 05:46:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:46:20,337 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-22 05:46:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:46:20,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-22 05:46:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:46:20,339 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:46:20,339 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 05:46:20,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:46:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 05:46:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-22 05:46:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:46:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-22 05:46:20,348 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2020-12-22 05:46:20,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:46:20,349 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-22 05:46:20,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:46:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-22 05:46:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:46:20,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:46:20,351 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:46:20,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:46:20,565 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:46:20,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:46:20,566 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2020-12-22 05:46:20,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:46:20,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472574204] [2020-12-22 05:46:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:46:20,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:46:20,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334471884] [2020-12-22 05:46:20,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:46:20,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:46:20,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:46:20,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:46:20,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:46:20,707 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 05:46:20,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472574204] [2020-12-22 05:46:20,708 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:46:20,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334471884] [2020-12-22 05:46:20,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:46:20,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:46:20,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570453328] [2020-12-22 05:46:20,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:46:20,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:46:20,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:46:20,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:46:20,710 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-12-22 05:46:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:46:20,755 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-22 05:46:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:46:20,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-22 05:46:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:46:20,757 INFO L225 Difference]: With dead ends: 38 [2020-12-22 05:46:20,757 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:46:20,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:46:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:46:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 05:46:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:46:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 05:46:20,764 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2020-12-22 05:46:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:46:20,765 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 05:46:20,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:46:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 05:46:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:46:20,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:46:20,766 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:46:20,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:46:20,981 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:46:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:46:20,982 INFO L82 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2020-12-22 05:46:20,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:46:20,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779220887] [2020-12-22 05:46:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:46:20,997 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:46:20,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130608261] [2020-12-22 05:46:20,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true