/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:14:31,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:14:31,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:14:31,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:14:31,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:14:31,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:14:31,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:14:31,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:14:31,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:14:31,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:14:31,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:14:31,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:14:31,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:14:31,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:14:31,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:14:31,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:14:31,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:14:31,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:14:31,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:14:31,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:14:31,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:14:32,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:14:32,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:14:32,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:14:32,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:14:32,027 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:14:32,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:14:32,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:14:32,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:14:32,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:14:32,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:14:32,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:14:32,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:14:32,031 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:14:32,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:14:32,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:14:32,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:14:32,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:14:32,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:14:32,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:14:32,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:14:32,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:14:32,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:14:32,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:14:32,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:14:32,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:14:32,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:14:32,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:14:32,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:14:32,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:14:32,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:14:32,449 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:14:32,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-12-22 05:14:32,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5600a01/dadf2cdf9a6d4a21a98beb7be177d0b0/FLAG84bc42758 [2020-12-22 05:14:33,098 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:14:33,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-12-22 05:14:33,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5600a01/dadf2cdf9a6d4a21a98beb7be177d0b0/FLAG84bc42758 [2020-12-22 05:14:33,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5600a01/dadf2cdf9a6d4a21a98beb7be177d0b0 [2020-12-22 05:14:33,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:14:33,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:14:33,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:14:33,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:14:33,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:14:33,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@469e5a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33, skipping insertion in model container [2020-12-22 05:14:33,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:14:33,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:14:33,669 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2020-12-22 05:14:33,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:14:33,707 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:14:33,723 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2020-12-22 05:14:33,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:14:33,755 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:14:33,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33 WrapperNode [2020-12-22 05:14:33,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:14:33,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:14:33,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:14:33,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:14:33,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:14:33,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:14:33,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:14:33,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:14:33,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... [2020-12-22 05:14:33,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:14:33,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:14:33,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:14:33,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:14:33,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:14:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:14:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:14:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:14:33,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:14:34,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:14:34,525 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 05:14:34,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:14:34 BoogieIcfgContainer [2020-12-22 05:14:34,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:14:34,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:14:34,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:14:34,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:14:34,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:14:33" (1/3) ... [2020-12-22 05:14:34,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4f7abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:14:34, skipping insertion in model container [2020-12-22 05:14:34,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:14:33" (2/3) ... [2020-12-22 05:14:34,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4f7abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:14:34, skipping insertion in model container [2020-12-22 05:14:34,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:14:34" (3/3) ... [2020-12-22 05:14:34,537 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2020-12-22 05:14:34,545 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:14:34,550 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 05:14:34,573 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 05:14:34,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:14:34,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:14:34,606 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:14:34,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:14:34,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:14:34,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:14:34,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:14:34,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:14:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-22 05:14:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:14:34,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:34,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:34,638 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1233339761, now seen corresponding path program 1 times [2020-12-22 05:14:34,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:34,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136740866] [2020-12-22 05:14:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:34,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136740866] [2020-12-22 05:14:34,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:34,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:14:34,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833771017] [2020-12-22 05:14:34,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:14:34,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:34,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:14:34,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:14:34,862 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-22 05:14:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:34,885 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2020-12-22 05:14:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:14:34,886 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 05:14:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:34,897 INFO L225 Difference]: With dead ends: 77 [2020-12-22 05:14:34,898 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 05:14:34,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:14:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 05:14:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 05:14:34,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 05:14:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-22 05:14:34,946 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2020-12-22 05:14:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:34,947 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-22 05:14:34,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:14:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-22 05:14:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:14:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:34,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:14:34,949 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1507359540, now seen corresponding path program 1 times [2020-12-22 05:14:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:34,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144353827] [2020-12-22 05:14:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:34,975 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:34,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657728653] [2020-12-22 05:14:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 05:14:35,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:35,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144353827] [2020-12-22 05:14:35,260 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:35,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657728653] [2020-12-22 05:14:35,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:35,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:14:35,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121160851] [2020-12-22 05:14:35,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:14:35,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:35,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:14:35,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:14:35,265 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2020-12-22 05:14:35,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:35,299 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-22 05:14:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:14:35,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-22 05:14:35,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:35,303 INFO L225 Difference]: With dead ends: 42 [2020-12-22 05:14:35,303 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 05:14:35,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:14:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 05:14:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 05:14:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 05:14:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-22 05:14:35,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2020-12-22 05:14:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:35,319 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-22 05:14:35,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:14:35,320 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-22 05:14:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:14:35,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:35,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:35,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:14:35,537 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash 515746917, now seen corresponding path program 1 times [2020-12-22 05:14:35,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:35,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847899249] [2020-12-22 05:14:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:35,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:35,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796684499] [2020-12-22 05:14:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:35,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:14:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:35,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847899249] [2020-12-22 05:14:35,715 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:35,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796684499] [2020-12-22 05:14:35,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:35,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:14:35,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915774150] [2020-12-22 05:14:35,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:14:35,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:35,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:14:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:14:35,721 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2020-12-22 05:14:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:35,887 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-12-22 05:14:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:14:35,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 05:14:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:35,890 INFO L225 Difference]: With dead ends: 66 [2020-12-22 05:14:35,890 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 05:14:35,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:14:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 05:14:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2020-12-22 05:14:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 05:14:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-12-22 05:14:35,900 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2020-12-22 05:14:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:35,900 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-12-22 05:14:35,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:14:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-12-22 05:14:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:14:35,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:35,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:36,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:36,118 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2020-12-22 05:14:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:36,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363293983] [2020-12-22 05:14:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:36,142 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:36,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53806581] [2020-12-22 05:14:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:14:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:36,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363293983] [2020-12-22 05:14:36,555 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:36,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53806581] [2020-12-22 05:14:36,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:36,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:14:36,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772786569] [2020-12-22 05:14:36,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:14:36,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:14:36,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:14:36,558 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-12-22 05:14:36,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:36,940 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-12-22 05:14:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:14:36,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-22 05:14:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:36,942 INFO L225 Difference]: With dead ends: 62 [2020-12-22 05:14:36,942 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 05:14:36,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:14:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 05:14:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2020-12-22 05:14:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 05:14:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2020-12-22 05:14:36,954 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2020-12-22 05:14:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:36,954 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2020-12-22 05:14:36,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:14:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2020-12-22 05:14:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:14:36,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:36,955 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:37,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:37,169 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:37,171 INFO L82 PathProgramCache]: Analyzing trace with hash -648504839, now seen corresponding path program 1 times [2020-12-22 05:14:37,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:37,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971295642] [2020-12-22 05:14:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:37,189 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:37,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999760835] [2020-12-22 05:14:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:37,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:14:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:37,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971295642] [2020-12-22 05:14:37,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:37,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999760835] [2020-12-22 05:14:37,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:37,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:14:37,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729778791] [2020-12-22 05:14:37,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:14:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:37,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:14:37,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:14:37,333 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 5 states. [2020-12-22 05:14:37,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:37,374 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-12-22 05:14:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:14:37,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-22 05:14:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:37,378 INFO L225 Difference]: With dead ends: 85 [2020-12-22 05:14:37,378 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 05:14:37,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:14:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 05:14:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 05:14:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 05:14:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-12-22 05:14:37,389 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2020-12-22 05:14:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:37,390 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-12-22 05:14:37,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:14:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-12-22 05:14:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:14:37,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:37,391 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:37,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:37,605 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1354097033, now seen corresponding path program 1 times [2020-12-22 05:14:37,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:37,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778625208] [2020-12-22 05:14:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:37,623 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:37,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146888290] [2020-12-22 05:14:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:37,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:14:37,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:37,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778625208] [2020-12-22 05:14:37,750 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:37,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146888290] [2020-12-22 05:14:37,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:37,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:14:37,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350016038] [2020-12-22 05:14:37,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:14:37,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:37,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:14:37,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:14:37,752 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 6 states. [2020-12-22 05:14:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:37,795 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2020-12-22 05:14:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:14:37,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-22 05:14:37,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:37,797 INFO L225 Difference]: With dead ends: 64 [2020-12-22 05:14:37,797 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 05:14:37,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:14:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 05:14:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 05:14:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 05:14:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-12-22 05:14:37,807 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2020-12-22 05:14:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:37,807 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-12-22 05:14:37,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:14:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-12-22 05:14:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:14:37,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:37,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:38,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:14:38,024 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1292001664, now seen corresponding path program 1 times [2020-12-22 05:14:38,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:38,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488677466] [2020-12-22 05:14:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:38,044 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:38,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232972069] [2020-12-22 05:14:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:38,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:14:38,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:38,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488677466] [2020-12-22 05:14:38,258 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:38,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232972069] [2020-12-22 05:14:38,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:38,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:14:38,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621978381] [2020-12-22 05:14:38,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:14:38,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:14:38,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:14:38,261 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 8 states. [2020-12-22 05:14:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:38,497 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-22 05:14:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:14:38,498 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-22 05:14:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:38,499 INFO L225 Difference]: With dead ends: 66 [2020-12-22 05:14:38,499 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 05:14:38,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:14:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 05:14:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-22 05:14:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 05:14:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-12-22 05:14:38,508 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2020-12-22 05:14:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:38,509 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-12-22 05:14:38,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:14:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-12-22 05:14:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:14:38,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:38,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:38,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:38,724 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:38,725 INFO L82 PathProgramCache]: Analyzing trace with hash 971917338, now seen corresponding path program 1 times [2020-12-22 05:14:38,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:38,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590558767] [2020-12-22 05:14:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:38,743 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:38,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100277188] [2020-12-22 05:14:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:14:38,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:38,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590558767] [2020-12-22 05:14:38,865 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:38,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100277188] [2020-12-22 05:14:38,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:38,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:14:38,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40417590] [2020-12-22 05:14:38,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:14:38,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:14:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:14:38,868 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 7 states. [2020-12-22 05:14:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:39,089 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2020-12-22 05:14:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 05:14:39,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 05:14:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:39,094 INFO L225 Difference]: With dead ends: 191 [2020-12-22 05:14:39,096 INFO L226 Difference]: Without dead ends: 187 [2020-12-22 05:14:39,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:14:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-22 05:14:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2020-12-22 05:14:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 05:14:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-12-22 05:14:39,134 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2020-12-22 05:14:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:39,134 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-12-22 05:14:39,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:14:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-12-22 05:14:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:14:39,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:39,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:39,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:39,356 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash -367893245, now seen corresponding path program 1 times [2020-12-22 05:14:39,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:39,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777341720] [2020-12-22 05:14:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:39,373 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:39,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972847857] [2020-12-22 05:14:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order 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 05:14:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:14:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:39,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777341720] [2020-12-22 05:14:39,541 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:39,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972847857] [2020-12-22 05:14:39,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:39,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:14:39,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754744046] [2020-12-22 05:14:39,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:14:39,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:39,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:14:39,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:14:39,543 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 8 states. [2020-12-22 05:14:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:39,729 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2020-12-22 05:14:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:14:39,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-22 05:14:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:39,731 INFO L225 Difference]: With dead ends: 111 [2020-12-22 05:14:39,731 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 05:14:39,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:14:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 05:14:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-12-22 05:14:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 05:14:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2020-12-22 05:14:39,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2020-12-22 05:14:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:39,745 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2020-12-22 05:14:39,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:14:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2020-12-22 05:14:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 05:14:39,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:39,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:39,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 05:14:39,960 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:39,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1357932506, now seen corresponding path program 1 times [2020-12-22 05:14:39,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:39,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457899764] [2020-12-22 05:14:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:39,977 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:39,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6728825] [2020-12-22 05:14:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:40,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:14:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:40,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457899764] [2020-12-22 05:14:40,089 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:40,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6728825] [2020-12-22 05:14:40,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:40,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:14:40,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550429330] [2020-12-22 05:14:40,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:14:40,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:40,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:14:40,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:14:40,091 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 5 states. [2020-12-22 05:14:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:40,213 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2020-12-22 05:14:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:14:40,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-22 05:14:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:40,215 INFO L225 Difference]: With dead ends: 226 [2020-12-22 05:14:40,215 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 05:14:40,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:14:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 05:14:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2020-12-22 05:14:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 05:14:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2020-12-22 05:14:40,234 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 22 [2020-12-22 05:14:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:40,234 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2020-12-22 05:14:40,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:14:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2020-12-22 05:14:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 05:14:40,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:40,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:40,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:40,447 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1235592658, now seen corresponding path program 1 times [2020-12-22 05:14:40,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:40,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546786748] [2020-12-22 05:14:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:40,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:40,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539673851] [2020-12-22 05:14:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 05:14:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:40,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546786748] [2020-12-22 05:14:40,629 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:40,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539673851] [2020-12-22 05:14:40,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:40,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:14:40,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34205260] [2020-12-22 05:14:40,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:14:40,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:14:40,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:14:40,631 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand 7 states. [2020-12-22 05:14:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:40,790 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2020-12-22 05:14:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:14:40,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-22 05:14:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:40,792 INFO L225 Difference]: With dead ends: 210 [2020-12-22 05:14:40,792 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 05:14:40,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:14:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 05:14:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2020-12-22 05:14:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 05:14:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2020-12-22 05:14:40,815 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 23 [2020-12-22 05:14:40,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:40,815 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2020-12-22 05:14:40,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:14:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2020-12-22 05:14:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 05:14:40,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:40,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:41,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:41,031 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:41,032 INFO L82 PathProgramCache]: Analyzing trace with hash -138249927, now seen corresponding path program 1 times [2020-12-22 05:14:41,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:41,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104598861] [2020-12-22 05:14:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:41,050 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:41,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125763800] [2020-12-22 05:14:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:41,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:14:41,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:41,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104598861] [2020-12-22 05:14:41,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:41,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125763800] [2020-12-22 05:14:41,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:41,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:14:41,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616530843] [2020-12-22 05:14:41,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:14:41,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:41,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:14:41,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:14:41,185 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand 6 states. [2020-12-22 05:14:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:41,227 INFO L93 Difference]: Finished difference Result 280 states and 375 transitions. [2020-12-22 05:14:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:14:41,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-12-22 05:14:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:41,230 INFO L225 Difference]: With dead ends: 280 [2020-12-22 05:14:41,230 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 05:14:41,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:14:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 05:14:41,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-12-22 05:14:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 05:14:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2020-12-22 05:14:41,255 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 23 [2020-12-22 05:14:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:41,255 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2020-12-22 05:14:41,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:14:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2020-12-22 05:14:41,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 05:14:41,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:41,256 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:41,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 05:14:41,472 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:41,474 INFO L82 PathProgramCache]: Analyzing trace with hash -265418908, now seen corresponding path program 1 times [2020-12-22 05:14:41,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:41,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831688560] [2020-12-22 05:14:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:41,488 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:41,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607175045] [2020-12-22 05:14:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:41,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:14:41,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:41,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831688560] [2020-12-22 05:14:41,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:41,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607175045] [2020-12-22 05:14:41,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:41,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:14:41,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170017145] [2020-12-22 05:14:41,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:14:41,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:41,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:14:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:14:41,630 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand 7 states. [2020-12-22 05:14:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:41,680 INFO L93 Difference]: Finished difference Result 303 states and 411 transitions. [2020-12-22 05:14:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:14:41,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-22 05:14:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:41,682 INFO L225 Difference]: With dead ends: 303 [2020-12-22 05:14:41,682 INFO L226 Difference]: Without dead ends: 196 [2020-12-22 05:14:41,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:14:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-22 05:14:41,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-12-22 05:14:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 05:14:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2020-12-22 05:14:41,703 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 24 [2020-12-22 05:14:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:41,703 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2020-12-22 05:14:41,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:14:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2020-12-22 05:14:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 05:14:41,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:41,704 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:41,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 05:14:41,918 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:41,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1931632236, now seen corresponding path program 2 times [2020-12-22 05:14:41,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:41,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219075954] [2020-12-22 05:14:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:41,931 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:41,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621680870] [2020-12-22 05:14:41,931 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:41,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:14:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:14:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:14:41,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:42,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219075954] [2020-12-22 05:14:42,061 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:42,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621680870] [2020-12-22 05:14:42,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:42,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:14:42,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963824080] [2020-12-22 05:14:42,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:14:42,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:42,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:14:42,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:14:42,069 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand 8 states. [2020-12-22 05:14:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:42,141 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-12-22 05:14:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:14:42,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-22 05:14:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:42,143 INFO L225 Difference]: With dead ends: 223 [2020-12-22 05:14:42,143 INFO L226 Difference]: Without dead ends: 219 [2020-12-22 05:14:42,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:14:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-22 05:14:42,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2020-12-22 05:14:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 05:14:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2020-12-22 05:14:42,165 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 25 [2020-12-22 05:14:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:42,166 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2020-12-22 05:14:42,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:14:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2020-12-22 05:14:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 05:14:42,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:42,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:42,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 05:14:42,383 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1993727605, now seen corresponding path program 1 times [2020-12-22 05:14:42,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:42,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648688739] [2020-12-22 05:14:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:42,395 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:42,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050482031] [2020-12-22 05:14:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:42,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 05:14:42,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:42,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648688739] [2020-12-22 05:14:42,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:42,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050482031] [2020-12-22 05:14:42,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:42,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:14:42,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772704105] [2020-12-22 05:14:42,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:14:42,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:42,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:14:42,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:14:42,592 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand 8 states. [2020-12-22 05:14:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:42,851 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2020-12-22 05:14:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 05:14:42,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-22 05:14:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:42,853 INFO L225 Difference]: With dead ends: 216 [2020-12-22 05:14:42,853 INFO L226 Difference]: Without dead ends: 214 [2020-12-22 05:14:42,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:14:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-22 05:14:42,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2020-12-22 05:14:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 05:14:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2020-12-22 05:14:42,875 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2020-12-22 05:14:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:42,875 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2020-12-22 05:14:42,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:14:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2020-12-22 05:14:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 05:14:42,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:42,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:43,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:43,090 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash 416971704, now seen corresponding path program 1 times [2020-12-22 05:14:43,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:43,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527163576] [2020-12-22 05:14:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:43,113 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:43,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040161137] [2020-12-22 05:14:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:14:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:43,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 05:14:43,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:43,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527163576] [2020-12-22 05:14:43,261 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:43,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040161137] [2020-12-22 05:14:43,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:43,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:14:43,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840572719] [2020-12-22 05:14:43,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:14:43,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:43,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:14:43,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:14:43,263 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand 9 states. [2020-12-22 05:14:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:43,585 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2020-12-22 05:14:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 05:14:43,586 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-22 05:14:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:43,588 INFO L225 Difference]: With dead ends: 336 [2020-12-22 05:14:43,588 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 05:14:43,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-22 05:14:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 05:14:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2020-12-22 05:14:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-22 05:14:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2020-12-22 05:14:43,611 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 27 [2020-12-22 05:14:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:43,612 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2020-12-22 05:14:43,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:14:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2020-12-22 05:14:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 05:14:43,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:43,612 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:43,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 05:14:43,828 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:43,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1345328893, now seen corresponding path program 2 times [2020-12-22 05:14:43,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:43,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206512530] [2020-12-22 05:14:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:43,839 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:43,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058296785] [2020-12-22 05:14:43,839 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 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 05:14:43,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:14:43,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:14:43,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:14:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:44,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206512530] [2020-12-22 05:14:44,009 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:44,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058296785] [2020-12-22 05:14:44,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:44,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 05:14:44,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488345960] [2020-12-22 05:14:44,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:14:44,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:44,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:14:44,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:14:44,014 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand 10 states. [2020-12-22 05:14:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:44,099 INFO L93 Difference]: Finished difference Result 412 states and 541 transitions. [2020-12-22 05:14:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:14:44,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-22 05:14:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:44,101 INFO L225 Difference]: With dead ends: 412 [2020-12-22 05:14:44,101 INFO L226 Difference]: Without dead ends: 217 [2020-12-22 05:14:44,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:14:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-22 05:14:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-12-22 05:14:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 05:14:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 199 transitions. [2020-12-22 05:14:44,124 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 199 transitions. Word has length 30 [2020-12-22 05:14:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:44,124 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 199 transitions. [2020-12-22 05:14:44,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:14:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 199 transitions. [2020-12-22 05:14:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 05:14:44,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:44,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:44,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 05:14:44,339 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:44,340 INFO L82 PathProgramCache]: Analyzing trace with hash -28513692, now seen corresponding path program 1 times [2020-12-22 05:14:44,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:44,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425452315] [2020-12-22 05:14:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:44,351 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:44,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453693854] [2020-12-22 05:14:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:44,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:14:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425452315] [2020-12-22 05:14:44,482 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453693854] [2020-12-22 05:14:44,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:44,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:14:44,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206462638] [2020-12-22 05:14:44,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:14:44,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:44,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:14:44,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:14:44,484 INFO L87 Difference]: Start difference. First operand 161 states and 199 transitions. Second operand 8 states. [2020-12-22 05:14:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:44,562 INFO L93 Difference]: Finished difference Result 217 states and 271 transitions. [2020-12-22 05:14:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:14:44,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-12-22 05:14:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:44,564 INFO L225 Difference]: With dead ends: 217 [2020-12-22 05:14:44,564 INFO L226 Difference]: Without dead ends: 163 [2020-12-22 05:14:44,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:14:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-22 05:14:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-12-22 05:14:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 05:14:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2020-12-22 05:14:44,582 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 30 [2020-12-22 05:14:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:44,583 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2020-12-22 05:14:44,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:14:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2020-12-22 05:14:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 05:14:44,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:44,584 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:44,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 05:14:44,798 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:44,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1158562919, now seen corresponding path program 2 times [2020-12-22 05:14:44,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:44,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271810905] [2020-12-22 05:14:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:44,812 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:44,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500518780] [2020-12-22 05:14:44,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:44,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:14:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:14:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:14:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 05:14:44,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271810905] [2020-12-22 05:14:44,916 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:44,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500518780] [2020-12-22 05:14:44,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:14:44,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:14:44,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92575340] [2020-12-22 05:14:44,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:14:44,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:14:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:14:44,918 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand 5 states. [2020-12-22 05:14:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:45,015 INFO L93 Difference]: Finished difference Result 251 states and 311 transitions. [2020-12-22 05:14:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:14:45,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-22 05:14:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:45,017 INFO L225 Difference]: With dead ends: 251 [2020-12-22 05:14:45,017 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 05:14:45,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:14:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 05:14:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 178. [2020-12-22 05:14:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 05:14:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 219 transitions. [2020-12-22 05:14:45,036 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 219 transitions. Word has length 31 [2020-12-22 05:14:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:45,036 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 219 transitions. [2020-12-22 05:14:45,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:14:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 219 transitions. [2020-12-22 05:14:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 05:14:45,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:45,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:45,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:45,252 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1302269029, now seen corresponding path program 1 times [2020-12-22 05:14:45,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:45,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88411576] [2020-12-22 05:14:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:45,262 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:45,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511235573] [2020-12-22 05:14:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 05:14:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:45,419 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 05:14:45,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88411576] [2020-12-22 05:14:45,419 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:45,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511235573] [2020-12-22 05:14:45,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:45,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:14:45,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673750033] [2020-12-22 05:14:45,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:14:45,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:45,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:14:45,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:14:45,421 INFO L87 Difference]: Start difference. First operand 178 states and 219 transitions. Second operand 9 states. [2020-12-22 05:14:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:45,809 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-12-22 05:14:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:14:45,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-12-22 05:14:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:45,812 INFO L225 Difference]: With dead ends: 246 [2020-12-22 05:14:45,812 INFO L226 Difference]: Without dead ends: 244 [2020-12-22 05:14:45,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:14:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-22 05:14:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2020-12-22 05:14:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 05:14:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 209 transitions. [2020-12-22 05:14:45,833 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 209 transitions. Word has length 32 [2020-12-22 05:14:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:45,834 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 209 transitions. [2020-12-22 05:14:45,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:14:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 209 transitions. [2020-12-22 05:14:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 05:14:45,835 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:45,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:46,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:14:46,049 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash 885134474, now seen corresponding path program 1 times [2020-12-22 05:14:46,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:46,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091026620] [2020-12-22 05:14:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:46,067 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:46,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92990338] [2020-12-22 05:14:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order 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 05:14:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:14:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 05:14:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:14:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:14:46,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091026620] [2020-12-22 05:14:46,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:14:46,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92990338] [2020-12-22 05:14:46,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:14:46,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 05:14:46,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164587595] [2020-12-22 05:14:46,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 05:14:46,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:14:46,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 05:14:46,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:14:46,518 INFO L87 Difference]: Start difference. First operand 171 states and 209 transitions. Second operand 13 states. [2020-12-22 05:14:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:14:47,252 INFO L93 Difference]: Finished difference Result 250 states and 309 transitions. [2020-12-22 05:14:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:14:47,253 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-12-22 05:14:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:14:47,254 INFO L225 Difference]: With dead ends: 250 [2020-12-22 05:14:47,254 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 05:14:47,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2020-12-22 05:14:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 05:14:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2020-12-22 05:14:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 05:14:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2020-12-22 05:14:47,278 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 33 [2020-12-22 05:14:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:14:47,278 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2020-12-22 05:14:47,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 05:14:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2020-12-22 05:14:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 05:14:47,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:14:47,280 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:14:47,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 05:14:47,493 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:14:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:14:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash 731699348, now seen corresponding path program 1 times [2020-12-22 05:14:47,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:14:47,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306062927] [2020-12-22 05:14:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:14:47,504 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:14:47,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487164687] [2020-12-22 05:14:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:14:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:14:47,585 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:14:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:14:47,613 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:14:47,697 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:14:47,697 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:14:47,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 05:14:47,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:14:47 BoogieIcfgContainer [2020-12-22 05:14:47,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:14:47,970 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:14:47,971 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:14:47,971 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:14:47,971 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:14:34" (3/4) ... [2020-12-22 05:14:47,973 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 05:14:48,040 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c-witness.graphml [2020-12-22 05:14:48,040 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:14:48,042 INFO L168 Benchmark]: Toolchain (without parser) took 14586.40 ms. Allocated memory was 153.1 MB in the beginning and 224.4 MB in the end (delta: 71.3 MB). Free memory was 128.6 MB in the beginning and 147.5 MB in the end (delta: -18.9 MB). Peak memory consumption was 52.8 MB. Max. memory is 8.0 GB. [2020-12-22 05:14:48,042 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:14:48,043 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.58 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 118.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:14:48,043 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.55 ms. Allocated memory is still 153.1 MB. Free memory was 118.3 MB in the beginning and 116.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:14:48,044 INFO L168 Benchmark]: Boogie Preprocessor took 30.39 ms. Allocated memory is still 153.1 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:14:48,044 INFO L168 Benchmark]: RCFGBuilder took 688.47 ms. Allocated memory is still 153.1 MB. Free memory was 115.2 MB in the beginning and 129.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. [2020-12-22 05:14:48,045 INFO L168 Benchmark]: TraceAbstraction took 13441.29 ms. Allocated memory was 153.1 MB in the beginning and 224.4 MB in the end (delta: 71.3 MB). Free memory was 129.8 MB in the beginning and 151.7 MB in the end (delta: -21.9 MB). Peak memory consumption was 50.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:14:48,045 INFO L168 Benchmark]: Witness Printer took 69.95 ms. Allocated memory is still 224.4 MB. Free memory was 151.2 MB in the beginning and 147.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:14:48,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 296.58 ms. Allocated memory is still 153.1 MB. Free memory was 128.5 MB in the beginning and 118.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 49.55 ms. Allocated memory is still 153.1 MB. Free memory was 118.3 MB in the beginning and 116.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.39 ms. Allocated memory is still 153.1 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 688.47 ms. Allocated memory is still 153.1 MB. Free memory was 115.2 MB in the beginning and 129.8 MB in the end (delta: -14.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13441.29 ms. Allocated memory was 153.1 MB in the beginning and 224.4 MB in the end (delta: 71.3 MB). Free memory was 129.8 MB in the beginning and 151.7 MB in the end (delta: -21.9 MB). Peak memory consumption was 50.4 MB. Max. memory is 8.0 GB. * Witness Printer took 69.95 ms. Allocated memory is still 224.4 MB. Free memory was 151.2 MB in the beginning and 147.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=7] [L13] reach_error() VAL [counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.3s, OverallIterations: 22, TraceHistogramMax: 4, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 849 SDtfs, 2564 SDslu, 2166 SDs, 0 SdLazy, 1376 SolverSat, 211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 511 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 21 MinimizatonAttempts, 571 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 504 NumberOfCodeBlocks, 504 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 445 ConstructedInterpolants, 0 QuantifiedInterpolants, 72464 SizeOfPredicates, 130 NumberOfNonLiveVariables, 2419 ConjunctsInSsa, 339 ConjunctsInUnsatCore, 21 InterpolantComputations, 11 PerfectInterpolantSequences, 64/124 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...