/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/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:33:52,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:33:52,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:33:52,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:33:52,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:33:52,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:33:52,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:33:52,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:33:52,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:33:52,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:33:52,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:33:52,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:33:52,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:33:52,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:33:52,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:33:52,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:33:52,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:33:52,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:33:52,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:33:52,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:33:52,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:33:52,874 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:33:52,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:33:52,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:33:52,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:33:52,877 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:33:52,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:33:52,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:33:52,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:33:52,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:33:52,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:33:52,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:33:52,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:33:52,878 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:33:52,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:33:52,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:33:52,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:33:52,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:33:52,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:33:52,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:33:52,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:33:52,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:33:52,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:33:52,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:33:52,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:33:52,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:33:52,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:33:53,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:33:53,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:33:53,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:33:53,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:33:53,354 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:33:53,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/gauss_sum.i [2020-12-22 04:33:53,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3729008d/f1319d803293458e98681ba12d3f2fa7/FLAGc3cf23112 [2020-12-22 04:33:54,280 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:33:54,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/gauss_sum.i [2020-12-22 04:33:54,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3729008d/f1319d803293458e98681ba12d3f2fa7/FLAGc3cf23112 [2020-12-22 04:33:54,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3729008d/f1319d803293458e98681ba12d3f2fa7 [2020-12-22 04:33:54,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:33:54,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:33:54,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:33:54,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:33:54,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:33:54,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:54,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443ae8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54, skipping insertion in model container [2020-12-22 04:33:54,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:54,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:33:54,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:33:54,874 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/loop-new/gauss_sum.i[891,904] [2020-12-22 04:33:54,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:33:54,910 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:33:54,930 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/loop-new/gauss_sum.i[891,904] [2020-12-22 04:33:54,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:33:54,964 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:33:54,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54 WrapperNode [2020-12-22 04:33:54,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:33:54,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:33:54,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:33:54,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:33:54,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:54,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:55,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:33:55,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:33:55,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:33:55,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:33:55,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:55,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:55,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:55,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:55,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:55,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:55,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (1/1) ... [2020-12-22 04:33:55,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:33:55,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:33:55,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:33:55,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:33:55,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (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 04:33:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:33:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:33:55,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:33:55,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:33:55,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:33:55,505 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:33:55,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:33:55 BoogieIcfgContainer [2020-12-22 04:33:55,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:33:55,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:33:55,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:33:55,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:33:55,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:33:54" (1/3) ... [2020-12-22 04:33:55,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1541e332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:33:55, skipping insertion in model container [2020-12-22 04:33:55,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:33:54" (2/3) ... [2020-12-22 04:33:55,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1541e332 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:33:55, skipping insertion in model container [2020-12-22 04:33:55,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:33:55" (3/3) ... [2020-12-22 04:33:55,521 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2020-12-22 04:33:55,530 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:33:55,542 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:33:55,582 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:33:55,658 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:33:55,659 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:33:55,659 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:33:55,659 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:33:55,659 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:33:55,659 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:33:55,660 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:33:55,660 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:33:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-22 04:33:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:33:55,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:55,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:55,694 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1807120264, now seen corresponding path program 1 times [2020-12-22 04:33:55,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:55,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087504248] [2020-12-22 04:33:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:56,000 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 04:33:56,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087504248] [2020-12-22 04:33:56,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:33:56,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:33:56,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632825285] [2020-12-22 04:33:56,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:33:56,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:33:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:33:56,035 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-22 04:33:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:56,055 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-22 04:33:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:33:56,058 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 04:33:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:56,071 INFO L225 Difference]: With dead ends: 21 [2020-12-22 04:33:56,071 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:33:56,075 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 04:33:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:33:56,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 04:33:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:33:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:33:56,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 04:33:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:56,121 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:33:56,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:33:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:33:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:33:56,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:56,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:56,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:33:56,123 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:56,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1806941518, now seen corresponding path program 1 times [2020-12-22 04:33:56,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:56,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308140124] [2020-12-22 04:33:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:56,143 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:33:56,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305539450] [2020-12-22 04:33:56,144 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 04:33:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:56,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:33:56,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:56,345 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 04:33:56,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308140124] [2020-12-22 04:33:56,349 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:33:56,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305539450] [2020-12-22 04:33:56,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:33:56,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:33:56,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898400410] [2020-12-22 04:33:56,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:33:56,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:33:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:33:56,356 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2020-12-22 04:33:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:56,388 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-22 04:33:56,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:33:56,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 04:33:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:56,390 INFO L225 Difference]: With dead ends: 15 [2020-12-22 04:33:56,391 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:33:56,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:33:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:33:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-12-22 04:33:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:33:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:33:56,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-22 04:33:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:56,397 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:33:56,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:33:56,398 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:33:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:33:56,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:56,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:56,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:33:56,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:56,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1357243696, now seen corresponding path program 1 times [2020-12-22 04:33:56,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:56,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511895868] [2020-12-22 04:33:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:56,656 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:33:56,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116709891] [2020-12-22 04:33:56,657 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 04:33:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:33:56,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:33:56,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:56,989 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:33:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:57,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511895868] [2020-12-22 04:33:57,051 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:33:57,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116709891] [2020-12-22 04:33:57,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:33:57,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 04:33:57,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230521165] [2020-12-22 04:33:57,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:33:57,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:57,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:33:57,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:33:57,058 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-22 04:33:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:57,172 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:33:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:33:57,172 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-22 04:33:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:57,173 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:33:57,173 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:33:57,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:33:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:33:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:33:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:33:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-22 04:33:57,178 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-12-22 04:33:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:57,179 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-22 04:33:57,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:33:57,179 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-22 04:33:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:33:57,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:57,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:57,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:57,394 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:57,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1305633646, now seen corresponding path program 2 times [2020-12-22 04:33:57,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:57,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882445274] [2020-12-22 04:33:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:57,416 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:33:57,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384686812] [2020-12-22 04:33:57,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:57,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:33:57,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:57,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:33:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:57,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:33:57,654 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 04:33:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882445274] [2020-12-22 04:33:57,654 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:33:57,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384686812] [2020-12-22 04:33:57,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:33:57,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 04:33:57,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438906790] [2020-12-22 04:33:57,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:33:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:33:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:33:57,658 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-22 04:33:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:57,815 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:33:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:33:57,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-22 04:33:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:57,817 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:33:57,817 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:33:57,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:33:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:33:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:33:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:33:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-22 04:33:57,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-12-22 04:33:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:57,823 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-22 04:33:57,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:33:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-22 04:33:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:33:57,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:57,825 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:58,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:58,039 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash -530250892, now seen corresponding path program 3 times [2020-12-22 04:33:58,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:58,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048635567] [2020-12-22 04:33:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:58,067 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:33:58,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741270106] [2020-12-22 04:33:58,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:58,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:33:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:33:58,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:58,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:33:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048635567] [2020-12-22 04:33:58,405 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:33:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741270106] [2020-12-22 04:33:58,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:33:58,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 04:33:58,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348329428] [2020-12-22 04:33:58,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:33:58,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:33:58,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:33:58,408 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-22 04:33:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:58,571 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:33:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:33:58,572 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 04:33:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:58,573 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:33:58,573 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:33:58,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:33:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:33:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 04:33:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:33:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-22 04:33:58,579 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-12-22 04:33:58,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:58,580 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-22 04:33:58,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:33:58,580 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-22 04:33:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:33:58,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:58,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:58,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:58,794 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1583233494, now seen corresponding path program 4 times [2020-12-22 04:33:58,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:58,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129403824] [2020-12-22 04:33:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:58,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:33:58,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919149798] [2020-12-22 04:33:58,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:58,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:33:58,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:33:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:33:59,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:33:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:33:59,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129403824] [2020-12-22 04:33:59,216 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:33:59,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919149798] [2020-12-22 04:33:59,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:33:59,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 04:33:59,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848438789] [2020-12-22 04:33:59,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:33:59,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:33:59,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:33:59,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:33:59,219 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2020-12-22 04:33:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:33:59,437 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:33:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:33:59,438 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-22 04:33:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:33:59,438 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:33:59,439 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:33:59,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:33:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:33:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 04:33:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:33:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-22 04:33:59,444 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-12-22 04:33:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:33:59,444 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-22 04:33:59,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:33:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-22 04:33:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:33:59,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:33:59,445 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:33:59,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:33:59,651 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:33:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:33:59,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1122197432, now seen corresponding path program 5 times [2020-12-22 04:33:59,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:33:59,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855795975] [2020-12-22 04:33:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:33:59,672 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:33:59,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193378491] [2020-12-22 04:33:59,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:33:59,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:33:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:33:59,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:33:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:00,061 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:00,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855795975] [2020-12-22 04:34:00,101 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:00,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193378491] [2020-12-22 04:34:00,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:00,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-22 04:34:00,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051912009] [2020-12-22 04:34:00,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:34:00,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:00,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:34:00,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:34:00,104 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2020-12-22 04:34:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:00,401 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:34:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:34:00,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-22 04:34:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:00,403 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:34:00,403 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:34:00,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:34:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:34:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 04:34:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:34:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 04:34:00,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-12-22 04:34:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:00,409 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 04:34:00,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:34:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 04:34:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:34:00,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:00,410 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:00,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:00,624 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash 448173338, now seen corresponding path program 6 times [2020-12-22 04:34:00,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:00,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155311216] [2020-12-22 04:34:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:00,643 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:00,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318443599] [2020-12-22 04:34:00,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:00,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:34:00,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:00,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:34:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:01,233 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:01,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155311216] [2020-12-22 04:34:01,278 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:01,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318443599] [2020-12-22 04:34:01,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:01,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-22 04:34:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418716732] [2020-12-22 04:34:01,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:34:01,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:01,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:34:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:34:01,281 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-12-22 04:34:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:01,648 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:34:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:34:01,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-22 04:34:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:01,650 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:34:01,650 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:34:01,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:34:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:34:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 04:34:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:34:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 04:34:01,656 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-12-22 04:34:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:01,657 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 04:34:01,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:34:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 04:34:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:34:01,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:01,658 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:01,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:01,871 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:01,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1251080700, now seen corresponding path program 7 times [2020-12-22 04:34:01,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:01,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041721631] [2020-12-22 04:34:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:01,889 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:01,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801277158] [2020-12-22 04:34:01,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:01,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:34:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:02,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:02,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041721631] [2020-12-22 04:34:02,558 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801277158] [2020-12-22 04:34:02,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:02,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-22 04:34:02,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102456799] [2020-12-22 04:34:02,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:34:02,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:34:02,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:34:02,561 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-12-22 04:34:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:03,014 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:34:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:34:03,016 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-22 04:34:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:03,017 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:34:03,017 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:34:03,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:34:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:34:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 04:34:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:34:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-22 04:34:03,022 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-12-22 04:34:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:03,023 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-22 04:34:03,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:34:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-22 04:34:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:34:03,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:03,024 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:03,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:34:03,238 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:03,239 INFO L82 PathProgramCache]: Analyzing trace with hash -249057698, now seen corresponding path program 8 times [2020-12-22 04:34:03,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:03,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088560585] [2020-12-22 04:34:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:03,265 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:03,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896154842] [2020-12-22 04:34:03,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:03,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:34:03,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:03,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:34:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:03,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:03,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088560585] [2020-12-22 04:34:03,956 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:03,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896154842] [2020-12-22 04:34:03,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:03,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-22 04:34:03,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867310260] [2020-12-22 04:34:03,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:34:03,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:03,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:34:03,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:34:03,959 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2020-12-22 04:34:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:04,433 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:34:04,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:34:04,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-22 04:34:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:04,435 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:34:04,435 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:34:04,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:34:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:34:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 04:34:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:34:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-22 04:34:04,441 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-12-22 04:34:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:04,441 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-22 04:34:04,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:34:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-22 04:34:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:34:04,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:04,443 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:04,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:04,656 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1226953280, now seen corresponding path program 9 times [2020-12-22 04:34:04,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:04,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718841447] [2020-12-22 04:34:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:04,675 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:04,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990495847] [2020-12-22 04:34:04,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:04,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:34:04,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:04,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:34:04,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:05,481 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:05,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718841447] [2020-12-22 04:34:05,540 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:05,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990495847] [2020-12-22 04:34:05,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:05,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-22 04:34:05,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071389917] [2020-12-22 04:34:05,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:34:05,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:05,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:34:05,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:34:05,543 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-22 04:34:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:06,159 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:34:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:34:06,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-22 04:34:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:06,161 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:34:06,161 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:34:06,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:34:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:34:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 04:34:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:34:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-22 04:34:06,168 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-12-22 04:34:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:06,168 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-22 04:34:06,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:34:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-22 04:34:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:34:06,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:06,169 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:06,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:06,381 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:06,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1960671838, now seen corresponding path program 10 times [2020-12-22 04:34:06,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:06,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078757179] [2020-12-22 04:34:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:06,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:06,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398768752] [2020-12-22 04:34:06,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:06,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:06,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:06,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:34:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:07,230 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078757179] [2020-12-22 04:34:07,293 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:07,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398768752] [2020-12-22 04:34:07,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:07,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-22 04:34:07,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014974215] [2020-12-22 04:34:07,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:34:07,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:07,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:34:07,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:34:07,295 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2020-12-22 04:34:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:07,922 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:34:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:34:07,924 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-22 04:34:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:07,925 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:34:07,925 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:34:07,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:34:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:34:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:34:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:34:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-22 04:34:07,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-12-22 04:34:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:07,931 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-22 04:34:07,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:34:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-22 04:34:07,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:34:07,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:07,932 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:08,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:34:08,141 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1338239108, now seen corresponding path program 11 times [2020-12-22 04:34:08,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:08,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151413477] [2020-12-22 04:34:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:08,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:08,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852253518] [2020-12-22 04:34:08,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:08,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:34:08,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:08,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:34:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:09,192 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:09,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151413477] [2020-12-22 04:34:09,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:09,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852253518] [2020-12-22 04:34:09,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:09,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-22 04:34:09,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244093751] [2020-12-22 04:34:09,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:34:09,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:09,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:34:09,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:34:09,266 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2020-12-22 04:34:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:09,971 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:34:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:34:09,973 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-22 04:34:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:09,974 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:34:09,974 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:34:09,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:34:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:34:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 04:34:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:34:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-22 04:34:09,980 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-12-22 04:34:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:09,981 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-22 04:34:09,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:34:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-22 04:34:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:34:09,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:09,983 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:10,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:34:10,197 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:10,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1905793766, now seen corresponding path program 12 times [2020-12-22 04:34:10,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:10,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211623349] [2020-12-22 04:34:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:10,228 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:10,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971863182] [2020-12-22 04:34:10,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:10,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:34:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:10,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:34:10,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:11,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:11,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211623349] [2020-12-22 04:34:11,546 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:11,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971863182] [2020-12-22 04:34:11,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:11,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-22 04:34:11,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078867060] [2020-12-22 04:34:11,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:34:11,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:11,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:34:11,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:34:11,548 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-22 04:34:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:12,412 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:34:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:34:12,413 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-22 04:34:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:12,414 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:34:12,414 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:34:12,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:34:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:34:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 04:34:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:34:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-22 04:34:12,421 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-12-22 04:34:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:12,421 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-22 04:34:12,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:34:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-22 04:34:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:34:12,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:12,422 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:12,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:34:12,636 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1864973512, now seen corresponding path program 13 times [2020-12-22 04:34:12,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:12,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114808344] [2020-12-22 04:34:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:12,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:12,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781295906] [2020-12-22 04:34:12,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:12,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 04:34:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:13,879 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:13,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114808344] [2020-12-22 04:34:13,971 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:13,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781295906] [2020-12-22 04:34:13,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:13,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-22 04:34:13,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309811243] [2020-12-22 04:34:13,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:34:13,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:13,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:34:13,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:34:13,974 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2020-12-22 04:34:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:15,011 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:34:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:34:15,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-22 04:34:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:15,014 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:34:15,014 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:34:15,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=986, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:34:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:34:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 04:34:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:34:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-22 04:34:15,030 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-12-22 04:34:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:15,031 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-22 04:34:15,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:34:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-22 04:34:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:34:15,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:15,032 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:15,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:15,247 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:15,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1291415082, now seen corresponding path program 14 times [2020-12-22 04:34:15,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:15,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803315063] [2020-12-22 04:34:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:15,263 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:15,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665365658] [2020-12-22 04:34:15,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:15,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:34:15,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:15,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:34:15,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:16,750 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:16,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803315063] [2020-12-22 04:34:16,835 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:16,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665365658] [2020-12-22 04:34:16,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:16,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-22 04:34:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218881735] [2020-12-22 04:34:16,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:34:16,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:16,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:34:16,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:34:16,837 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2020-12-22 04:34:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:17,919 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:34:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:34:17,920 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-22 04:34:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:17,921 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:34:17,921 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:34:17,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:34:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:34:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 04:34:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:34:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-22 04:34:17,927 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-12-22 04:34:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:17,928 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-22 04:34:17,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:34:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-22 04:34:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:34:17,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:17,929 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:18,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:34:18,142 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:18,143 INFO L82 PathProgramCache]: Analyzing trace with hash -142422260, now seen corresponding path program 15 times [2020-12-22 04:34:18,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:18,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032786532] [2020-12-22 04:34:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:18,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:18,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096906788] [2020-12-22 04:34:18,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:18,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:34:18,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:18,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 04:34:18,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:19,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:19,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032786532] [2020-12-22 04:34:19,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:19,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096906788] [2020-12-22 04:34:19,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:19,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-22 04:34:19,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310786572] [2020-12-22 04:34:19,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:34:19,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:19,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:34:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:34:19,909 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-22 04:34:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:21,226 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:34:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:34:21,228 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-22 04:34:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:21,228 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:34:21,228 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:34:21,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=78, Invalid=1254, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:34:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:34:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:34:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:34:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-22 04:34:21,236 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-12-22 04:34:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:21,236 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-22 04:34:21,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:34:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-22 04:34:21,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:34:21,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:21,238 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:21,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:34:21,452 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash 624394094, now seen corresponding path program 16 times [2020-12-22 04:34:21,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:21,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682292871] [2020-12-22 04:34:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:21,475 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:21,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254574811] [2020-12-22 04:34:21,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:21,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:21,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:34:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:23,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:23,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682292871] [2020-12-22 04:34:23,461 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:23,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254574811] [2020-12-22 04:34:23,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:23,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-22 04:34:23,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581823514] [2020-12-22 04:34:23,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:34:23,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:23,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:34:23,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:34:23,463 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2020-12-22 04:34:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:24,958 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:34:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:34:24,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-12-22 04:34:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:24,960 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:34:24,960 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:34:24,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:34:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:34:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 04:34:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:34:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-22 04:34:24,966 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-12-22 04:34:24,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:24,967 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-22 04:34:24,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:34:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-22 04:34:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:34:24,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:24,968 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:25,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:34:25,170 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1199464624, now seen corresponding path program 17 times [2020-12-22 04:34:25,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:25,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067579543] [2020-12-22 04:34:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:25,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:25,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579244804] [2020-12-22 04:34:25,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:25,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:34:25,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:25,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 04:34:25,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:27,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067579543] [2020-12-22 04:34:27,374 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579244804] [2020-12-22 04:34:27,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:27,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-22 04:34:27,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764665664] [2020-12-22 04:34:27,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:34:27,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:27,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:34:27,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:34:27,378 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2020-12-22 04:34:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:28,972 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:34:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:34:28,973 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-22 04:34:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:28,974 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:34:28,974 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:34:28,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=86, Invalid=1554, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:34:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:34:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 04:34:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:34:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-22 04:34:28,980 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-12-22 04:34:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:28,981 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-22 04:34:28,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:34:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-22 04:34:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:34:28,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:28,982 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:29,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:29,185 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:29,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1581035854, now seen corresponding path program 18 times [2020-12-22 04:34:29,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:29,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29054787] [2020-12-22 04:34:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:29,199 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:29,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905220992] [2020-12-22 04:34:29,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:29,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:34:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:29,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 04:34:29,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:31,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:31,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29054787] [2020-12-22 04:34:31,482 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:31,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905220992] [2020-12-22 04:34:31,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:31,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-22 04:34:31,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707872440] [2020-12-22 04:34:31,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:34:31,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:31,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:34:31,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:34:31,484 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-22 04:34:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:33,340 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:34:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:34:33,342 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-22 04:34:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:33,343 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:34:33,343 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:34:33,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:34:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:34:33,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 04:34:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:34:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-22 04:34:33,355 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-12-22 04:34:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:33,356 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-22 04:34:33,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:34:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-22 04:34:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:34:33,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:33,357 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:33,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:33,574 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1096199572, now seen corresponding path program 19 times [2020-12-22 04:34:33,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:33,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228024854] [2020-12-22 04:34:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:33,588 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:33,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770954433] [2020-12-22 04:34:33,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:34:33,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 04:34:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:36,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:36,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228024854] [2020-12-22 04:34:36,249 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:36,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770954433] [2020-12-22 04:34:36,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:36,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-22 04:34:36,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935262936] [2020-12-22 04:34:36,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:34:36,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:36,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:34:36,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:34:36,252 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2020-12-22 04:34:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:38,248 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:34:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:34:38,249 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-12-22 04:34:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:38,250 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:34:38,250 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:34:38,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=94, Invalid=1886, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:34:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:34:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:34:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:34:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-22 04:34:38,257 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-12-22 04:34:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:38,257 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-22 04:34:38,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:34:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-22 04:34:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:34:38,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:38,258 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:38,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:34:38,474 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:38,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1234033654, now seen corresponding path program 20 times [2020-12-22 04:34:38,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:38,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128410381] [2020-12-22 04:34:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:38,488 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:38,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023752399] [2020-12-22 04:34:38,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:38,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:34:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:38,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-22 04:34:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:41,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128410381] [2020-12-22 04:34:41,507 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023752399] [2020-12-22 04:34:41,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:41,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-22 04:34:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320301497] [2020-12-22 04:34:41,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:34:41,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:41,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:34:41,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:34:41,510 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2020-12-22 04:34:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:43,871 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:34:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:34:43,875 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-12-22 04:34:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:43,876 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:34:43,876 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:34:43,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:34:43,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:34:43,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 04:34:43,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:34:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-22 04:34:43,884 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-12-22 04:34:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:43,884 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-22 04:34:43,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:34:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-22 04:34:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:34:43,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:43,885 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:44,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:34:44,089 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash 548600280, now seen corresponding path program 21 times [2020-12-22 04:34:44,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:44,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132641186] [2020-12-22 04:34:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:44,101 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:44,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508231654] [2020-12-22 04:34:44,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:44,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:34:44,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:44,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-22 04:34:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:47,209 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:47,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132641186] [2020-12-22 04:34:47,340 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:47,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508231654] [2020-12-22 04:34:47,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:47,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-22 04:34:47,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077397296] [2020-12-22 04:34:47,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:34:47,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:47,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:34:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:34:47,342 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2020-12-22 04:34:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:49,801 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:34:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:34:49,802 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2020-12-22 04:34:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:49,803 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:34:49,803 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:34:49,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=102, Invalid=2250, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:34:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:34:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 04:34:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:34:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-22 04:34:49,816 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-12-22 04:34:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:49,817 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-22 04:34:49,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:34:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-22 04:34:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:34:49,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:49,818 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:50,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:50,032 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1022875846, now seen corresponding path program 22 times [2020-12-22 04:34:50,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:50,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379511574] [2020-12-22 04:34:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:50,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:50,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469993963] [2020-12-22 04:34:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:50,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:34:50,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:50,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-22 04:34:50,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:34:53,476 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:34:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:34:53,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379511574] [2020-12-22 04:34:53,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:34:53,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469993963] [2020-12-22 04:34:53,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:34:53,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-12-22 04:34:53,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918946428] [2020-12-22 04:34:53,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:34:53,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:34:53,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:34:53,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:34:53,619 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 49 states. [2020-12-22 04:34:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:34:56,358 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:34:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:34:56,361 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2020-12-22 04:34:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:34:56,362 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:34:56,362 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:34:56,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:34:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:34:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 04:34:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:34:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-22 04:34:56,372 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-12-22 04:34:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:34:56,372 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-22 04:34:56,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:34:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-22 04:34:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:34:56,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:34:56,373 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:34:56,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:34:56,587 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:34:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:34:56,588 INFO L82 PathProgramCache]: Analyzing trace with hash 617055260, now seen corresponding path program 23 times [2020-12-22 04:34:56,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:34:56,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947265361] [2020-12-22 04:34:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:34:56,602 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:34:56,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69488415] [2020-12-22 04:34:56,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:34:56,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:34:56,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:34:56,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-22 04:34:56,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:00,139 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:00,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947265361] [2020-12-22 04:35:00,295 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:35:00,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69488415] [2020-12-22 04:35:00,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:00,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-22 04:35:00,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221796781] [2020-12-22 04:35:00,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:35:00,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:00,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:35:00,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:35:00,297 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 51 states. [2020-12-22 04:35:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:03,266 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:35:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:35:03,269 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 53 [2020-12-22 04:35:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:03,270 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:35:03,270 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:35:03,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=110, Invalid=2646, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:35:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:35:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 04:35:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:35:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-22 04:35:03,276 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-12-22 04:35:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:03,276 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-22 04:35:03,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:35:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-22 04:35:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:35:03,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:03,277 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:03,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:03,481 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash 337850494, now seen corresponding path program 24 times [2020-12-22 04:35:03,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:03,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591850802] [2020-12-22 04:35:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:03,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:35:03,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588313443] [2020-12-22 04:35:03,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:03,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:35:03,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:03,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 109 conjunts are in the unsatisfiable core [2020-12-22 04:35:03,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:07,360 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:07,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591850802] [2020-12-22 04:35:07,498 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:35:07,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588313443] [2020-12-22 04:35:07,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:07,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-22 04:35:07,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302940241] [2020-12-22 04:35:07,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:35:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:35:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:35:07,500 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 53 states. [2020-12-22 04:35:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:10,592 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:35:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:35:10,593 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 55 [2020-12-22 04:35:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:10,594 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:35:10,594 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:35:10,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:35:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:35:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 04:35:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 04:35:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-12-22 04:35:10,599 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-12-22 04:35:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:10,600 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-12-22 04:35:10,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:35:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-12-22 04:35:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 04:35:10,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:10,601 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:10,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:35:10,801 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:10,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1689957280, now seen corresponding path program 25 times [2020-12-22 04:35:10,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:10,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819928267] [2020-12-22 04:35:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:10,820 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:35:10,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740122089] [2020-12-22 04:35:10,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:10,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-22 04:35:10,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:14,965 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:15,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819928267] [2020-12-22 04:35:15,107 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:35:15,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740122089] [2020-12-22 04:35:15,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:15,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-12-22 04:35:15,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058016657] [2020-12-22 04:35:15,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:35:15,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:35:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:35:15,110 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 55 states. [2020-12-22 04:35:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:18,576 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:35:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 04:35:18,577 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 57 [2020-12-22 04:35:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:18,578 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:35:18,578 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:35:18,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=118, Invalid=3074, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:35:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:35:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-22 04:35:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 04:35:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-12-22 04:35:18,583 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-12-22 04:35:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:18,584 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-12-22 04:35:18,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:35:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-12-22 04:35:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 04:35:18,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:18,585 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:18,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:35:18,796 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:18,797 INFO L82 PathProgramCache]: Analyzing trace with hash -498075710, now seen corresponding path program 26 times [2020-12-22 04:35:18,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:18,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715692766] [2020-12-22 04:35:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:18,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:35:18,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139738756] [2020-12-22 04:35:18,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:18,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:18,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:18,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 117 conjunts are in the unsatisfiable core [2020-12-22 04:35:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:23,420 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:23,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715692766] [2020-12-22 04:35:23,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:35:23,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139738756] [2020-12-22 04:35:23,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:23,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-22 04:35:23,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960878811] [2020-12-22 04:35:23,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:35:23,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:35:23,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:35:23,583 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 57 states. [2020-12-22 04:35:27,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:27,166 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:35:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 04:35:27,167 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 59 [2020-12-22 04:35:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:27,168 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:35:27,168 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:35:27,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:35:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:35:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 04:35:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:35:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-22 04:35:27,174 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-12-22 04:35:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:27,174 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-22 04:35:27,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 04:35:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-22 04:35:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 04:35:27,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:27,175 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:27,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:35:27,390 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:27,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1856154972, now seen corresponding path program 27 times [2020-12-22 04:35:27,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:27,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968244817] [2020-12-22 04:35:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:27,402 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:35:27,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263970029] [2020-12-22 04:35:27,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:27,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:35:27,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:27,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 121 conjunts are in the unsatisfiable core [2020-12-22 04:35:27,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:32,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968244817] [2020-12-22 04:35:32,533 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:35:32,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263970029] [2020-12-22 04:35:32,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:32,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-12-22 04:35:32,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771875166] [2020-12-22 04:35:32,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:35:32,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:35:32,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:35:32,536 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 59 states. [2020-12-22 04:35:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:36,535 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:35:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 04:35:36,537 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 61 [2020-12-22 04:35:36,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:36,537 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:35:36,538 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:35:36,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=126, Invalid=3534, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:35:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:35:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 04:35:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:35:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-12-22 04:35:36,544 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-12-22 04:35:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:36,544 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-12-22 04:35:36,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:35:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-12-22 04:35:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 04:35:36,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:36,545 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:36,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:35:36,762 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:36,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1300267770, now seen corresponding path program 28 times [2020-12-22 04:35:36,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:36,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757760090] [2020-12-22 04:35:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:36,773 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:35:36,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729895776] [2020-12-22 04:35:36,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:36,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:35:36,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:36,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-22 04:35:36,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:42,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:42,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757760090] [2020-12-22 04:35:42,341 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:35:42,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729895776] [2020-12-22 04:35:42,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:42,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-12-22 04:35:42,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804800469] [2020-12-22 04:35:42,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 04:35:42,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 04:35:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:35:42,343 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 61 states. [2020-12-22 04:35:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:46,728 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:35:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 04:35:46,733 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 63 [2020-12-22 04:35:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:46,734 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:35:46,734 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:35:46,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:35:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:35:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 04:35:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:35:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-12-22 04:35:46,739 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-12-22 04:35:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:46,740 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-12-22 04:35:46,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 04:35:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-12-22 04:35:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 04:35:46,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:46,740 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:46,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,944 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash 331388648, now seen corresponding path program 29 times [2020-12-22 04:35:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:46,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656322125] [2020-12-22 04:35:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:46,956 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:35:46,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012410999] [2020-12-22 04:35:46,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:47,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:35:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:47,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 127 conjunts are in the unsatisfiable core [2020-12-22 04:35:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:52,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:35:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:53,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656322125] [2020-12-22 04:35:53,005 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:35:53,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012410999] [2020-12-22 04:35:53,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:53,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-12-22 04:35:53,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891677826] [2020-12-22 04:35:53,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:35:53,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:35:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:35:53,007 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 63 states. [2020-12-22 04:35:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:57,559 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-22 04:35:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 04:35:57,560 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 65 [2020-12-22 04:35:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:57,561 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:35:57,561 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 04:35:57,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=134, Invalid=4026, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:35:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 04:35:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-22 04:35:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 04:35:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-12-22 04:35:57,566 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-12-22 04:35:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:57,567 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-12-22 04:35:57,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:35:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-12-22 04:35:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 04:35:57,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:57,567 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:57,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:57,770 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:57,771 INFO L82 PathProgramCache]: Analyzing trace with hash 690143306, now seen corresponding path program 30 times [2020-12-22 04:35:57,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:57,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830216032] [2020-12-22 04:35:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:57,785 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:35:57,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228212453] [2020-12-22 04:35:57,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:57,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:35:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:57,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 134 conjunts are in the unsatisfiable core [2020-12-22 04:35:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:04,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:36:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:04,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830216032] [2020-12-22 04:36:04,588 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:36:04,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228212453] [2020-12-22 04:36:04,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:36:04,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-12-22 04:36:04,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526538407] [2020-12-22 04:36:04,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 04:36:04,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:04,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 04:36:04,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:36:04,589 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 65 states. [2020-12-22 04:36:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:09,606 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-22 04:36:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 04:36:09,607 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 67 [2020-12-22 04:36:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:09,608 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:36:09,608 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 04:36:09,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:36:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 04:36:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-22 04:36:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:36:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-12-22 04:36:09,615 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-12-22 04:36:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:09,615 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-12-22 04:36:09,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 04:36:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-12-22 04:36:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 04:36:09,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:09,616 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:09,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:09,828 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1855985964, now seen corresponding path program 31 times [2020-12-22 04:36:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:09,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426114752] [2020-12-22 04:36:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:09,841 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:36:09,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15402252] [2020-12-22 04:36:09,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:09,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 135 conjunts are in the unsatisfiable core [2020-12-22 04:36:09,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:15,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:36:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:16,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426114752] [2020-12-22 04:36:16,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:36:16,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15402252] [2020-12-22 04:36:16,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:36:16,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-12-22 04:36:16,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822597985] [2020-12-22 04:36:16,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 04:36:16,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 04:36:16,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 04:36:16,150 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 67 states. [2020-12-22 04:36:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:21,188 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-22 04:36:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 04:36:21,190 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 69 [2020-12-22 04:36:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:21,191 INFO L225 Difference]: With dead ends: 76 [2020-12-22 04:36:21,191 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:36:21,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=142, Invalid=4550, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:36:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:36:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 04:36:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:36:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-12-22 04:36:21,197 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-12-22 04:36:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:21,198 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-12-22 04:36:21,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 04:36:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-12-22 04:36:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:36:21,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:21,199 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:21,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:36:21,403 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:21,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:21,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1244316046, now seen corresponding path program 32 times [2020-12-22 04:36:21,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:21,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629833146] [2020-12-22 04:36:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:21,417 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:36:21,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280918847] [2020-12-22 04:36:21,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:21,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:36:21,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:21,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 141 conjunts are in the unsatisfiable core [2020-12-22 04:36:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:28,132 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:36:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:28,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629833146] [2020-12-22 04:36:28,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:36:28,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280918847] [2020-12-22 04:36:28,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:36:28,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-12-22 04:36:28,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269747511] [2020-12-22 04:36:28,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 04:36:28,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:28,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 04:36:28,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 04:36:28,334 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 69 states. [2020-12-22 04:36:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:33,760 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-22 04:36:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 04:36:33,761 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 71 [2020-12-22 04:36:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:33,761 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:36:33,762 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:36:33,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:36:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:36:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 04:36:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:36:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-12-22 04:36:33,770 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-12-22 04:36:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:33,770 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-12-22 04:36:33,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 04:36:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-12-22 04:36:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 04:36:33,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:33,771 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:33,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:33,985 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:33,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1840044400, now seen corresponding path program 33 times [2020-12-22 04:36:33,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:33,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812849944] [2020-12-22 04:36:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:33,997 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:36:33,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710770695] [2020-12-22 04:36:33,997 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:34,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:36:34,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:34,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 145 conjunts are in the unsatisfiable core [2020-12-22 04:36:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:40,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:36:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:41,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812849944] [2020-12-22 04:36:41,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:36:41,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710770695] [2020-12-22 04:36:41,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:36:41,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-12-22 04:36:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909822086] [2020-12-22 04:36:41,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 04:36:41,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:41,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 04:36:41,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 04:36:41,180 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 71 states. [2020-12-22 04:36:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:46,732 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-22 04:36:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 04:36:46,734 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 73 [2020-12-22 04:36:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:46,735 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:36:46,735 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 04:36:46,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=150, Invalid=5106, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:36:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 04:36:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-22 04:36:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 04:36:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-12-22 04:36:46,740 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-12-22 04:36:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:46,740 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-12-22 04:36:46,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 04:36:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-12-22 04:36:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 04:36:46,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:46,740 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:46,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:36:46,941 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:46,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1190625070, now seen corresponding path program 34 times [2020-12-22 04:36:46,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:46,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161543714] [2020-12-22 04:36:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:46,955 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:36:46,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990949113] [2020-12-22 04:36:46,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:47,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:47,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 147 conjunts are in the unsatisfiable core [2020-12-22 04:36:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:54,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:36:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:54,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161543714] [2020-12-22 04:36:54,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:36:54,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990949113] [2020-12-22 04:36:54,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:36:54,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-12-22 04:36:54,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991917619] [2020-12-22 04:36:54,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 04:36:54,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:54,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 04:36:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 04:36:54,602 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 73 states. [2020-12-22 04:37:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:00,769 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-22 04:37:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 04:37:00,770 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 75 [2020-12-22 04:37:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:00,771 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:37:00,771 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 04:37:00,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:37:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 04:37:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-22 04:37:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:37:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-12-22 04:37:00,777 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-12-22 04:37:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:00,777 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-12-22 04:37:00,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 04:37:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-12-22 04:37:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 04:37:00,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:00,778 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:00,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:00,979 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1676159052, now seen corresponding path program 35 times [2020-12-22 04:37:00,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:00,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686984245] [2020-12-22 04:37:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:00,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:37:00,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224888667] [2020-12-22 04:37:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:01,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:37:01,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:01,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 151 conjunts are in the unsatisfiable core [2020-12-22 04:37:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:08,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:37:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:37:08,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686984245] [2020-12-22 04:37:08,816 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:37:08,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224888667] [2020-12-22 04:37:08,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:37:08,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-12-22 04:37:08,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067286021] [2020-12-22 04:37:08,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 04:37:08,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 04:37:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 04:37:08,817 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 75 states. [2020-12-22 04:37:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:15,069 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-22 04:37:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 04:37:15,070 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 77 [2020-12-22 04:37:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:15,071 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:37:15,071 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:37:15,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=158, Invalid=5694, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:37:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:37:15,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-22 04:37:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:37:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-12-22 04:37:15,078 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-12-22 04:37:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:15,078 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-12-22 04:37:15,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 04:37:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-12-22 04:37:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 04:37:15,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:15,079 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:15,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:37:15,294 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:15,294 INFO L82 PathProgramCache]: Analyzing trace with hash -122880490, now seen corresponding path program 36 times [2020-12-22 04:37:15,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:15,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562206538] [2020-12-22 04:37:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:15,306 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:37:15,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909107174] [2020-12-22 04:37:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:15,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:37:15,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:15,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 157 conjunts are in the unsatisfiable core [2020-12-22 04:37:15,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:24,689 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:37:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:37:24,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562206538] [2020-12-22 04:37:24,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:37:24,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909107174] [2020-12-22 04:37:24,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:37:24,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-12-22 04:37:24,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937284362] [2020-12-22 04:37:24,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 04:37:24,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:24,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 04:37:24,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 04:37:24,939 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 77 states. [2020-12-22 04:37:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:32,867 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-22 04:37:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 04:37:32,868 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 79 [2020-12-22 04:37:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:32,869 INFO L225 Difference]: With dead ends: 86 [2020-12-22 04:37:32,869 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:37:32,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=162, Invalid=6000, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 04:37:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:37:32,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 04:37:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:37:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-12-22 04:37:32,874 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-12-22 04:37:32,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:32,875 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-12-22 04:37:32,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 04:37:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-12-22 04:37:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 04:37:32,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:32,875 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:33,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:37:33,076 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2070801416, now seen corresponding path program 37 times [2020-12-22 04:37:33,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:33,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329094969] [2020-12-22 04:37:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:33,089 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:37:33,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63576000] [2020-12-22 04:37:33,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:33,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 159 conjunts are in the unsatisfiable core [2020-12-22 04:37:33,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:41,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:37:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:37:42,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329094969] [2020-12-22 04:37:42,033 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:37:42,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63576000] [2020-12-22 04:37:42,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:37:42,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-12-22 04:37:42,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068135340] [2020-12-22 04:37:42,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 04:37:42,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:42,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 04:37:42,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 04:37:42,034 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 79 states. [2020-12-22 04:37:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:49,444 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-22 04:37:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 04:37:49,445 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 81 [2020-12-22 04:37:49,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:49,446 INFO L225 Difference]: With dead ends: 88 [2020-12-22 04:37:49,446 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 04:37:49,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=166, Invalid=6314, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:37:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 04:37:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-22 04:37:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 04:37:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-12-22 04:37:49,453 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-12-22 04:37:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:49,453 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-12-22 04:37:49,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 04:37:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-12-22 04:37:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 04:37:49,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:49,454 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:49,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:37:49,666 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1417070246, now seen corresponding path program 38 times [2020-12-22 04:37:49,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:49,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299125225] [2020-12-22 04:37:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:49,678 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:37:49,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333165729] [2020-12-22 04:37:49,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:49,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:37:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:49,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 166 conjunts are in the unsatisfiable core [2020-12-22 04:37:49,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:38:00,181 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:38:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:38:00,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299125225] [2020-12-22 04:38:00,477 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:38:00,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333165729] [2020-12-22 04:38:00,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:38:00,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-12-22 04:38:00,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761361400] [2020-12-22 04:38:00,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 04:38:00,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:38:00,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 04:38:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6320, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:38:00,479 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 81 states. [2020-12-22 04:38:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:38:09,151 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-22 04:38:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 04:38:09,152 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 83 [2020-12-22 04:38:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:38:09,154 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:38:09,154 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:38:09,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=170, Invalid=6636, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 04:38:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:38:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 04:38:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:38:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-12-22 04:38:09,161 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-12-22 04:38:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:38:09,161 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-12-22 04:38:09,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 04:38:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-12-22 04:38:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 04:38:09,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:38:09,162 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:38:09,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:38:09,373 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:38:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:38:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash -246641092, now seen corresponding path program 39 times [2020-12-22 04:38:09,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:38:09,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733202309] [2020-12-22 04:38:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:38:09,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:38:09,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294572659] [2020-12-22 04:38:09,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:38:09,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 04:38:09,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:38:09,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 169 conjunts are in the unsatisfiable core [2020-12-22 04:38:09,546 INFO L286 TraceCheckSpWp]: Computing forward predicates...