/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/hard-u_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:29:36,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:29:36,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:29:36,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:29:36,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:29:36,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:29:36,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:29:36,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:29:36,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:29:36,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:29:36,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:29:36,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:29:36,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:29:36,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:29:36,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:29:36,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:29:36,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:29:36,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:29:36,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:29:36,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:29:36,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:29:36,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:29:36,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:29:36,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:29:36,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:29:36,967 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:29:36,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:29:36,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:29:36,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:29:36,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:29:36,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:29:36,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:29:36,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:29:36,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:29:36,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:29:36,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:29:36,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:29:36,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:29:36,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:29:36,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:29:36,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:29:36,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:29:36,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:29:36,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:29:36,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:29:36,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:29:36,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:29:37,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:29:37,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:29:37,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:29:37,436 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:29:37,437 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:29:37,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c [2020-12-22 05:29:37,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9e7b073f/fab89b1f013c4ccba7567c0303b63c0c/FLAG61ed37590 [2020-12-22 05:29:38,159 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:29:38,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound10.c [2020-12-22 05:29:38,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9e7b073f/fab89b1f013c4ccba7567c0303b63c0c/FLAG61ed37590 [2020-12-22 05:29:38,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9e7b073f/fab89b1f013c4ccba7567c0303b63c0c [2020-12-22 05:29:38,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:29:38,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:29:38,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:29:38,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:29:38,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:29:38,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fdb08ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38, skipping insertion in model container [2020-12-22 05:29:38,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:29:38,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:29:38,778 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/hard-u_unwindbound10.c[537,550] [2020-12-22 05:29:38,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:29:38,809 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:29:38,824 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/hard-u_unwindbound10.c[537,550] [2020-12-22 05:29:38,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:29:38,853 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:29:38,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38 WrapperNode [2020-12-22 05:29:38,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:29:38,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:29:38,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:29:38,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:29:38,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:29:38,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:29:38,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:29:38,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:29:38,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (1/1) ... [2020-12-22 05:29:38,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:29:38,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:29:38,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:29:38,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:29:38,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (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 05:29:39,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:29:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:29:39,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:29:39,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:29:39,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:29:39,682 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-22 05:29:39,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:29:39 BoogieIcfgContainer [2020-12-22 05:29:39,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:29:39,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:29:39,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:29:39,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:29:39,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:29:38" (1/3) ... [2020-12-22 05:29:39,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eee8353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:29:39, skipping insertion in model container [2020-12-22 05:29:39,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:29:38" (2/3) ... [2020-12-22 05:29:39,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eee8353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:29:39, skipping insertion in model container [2020-12-22 05:29:39,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:29:39" (3/3) ... [2020-12-22 05:29:39,701 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound10.c [2020-12-22 05:29:39,708 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:29:39,713 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-22 05:29:39,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-22 05:29:39,781 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:29:39,781 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:29:39,782 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:29:39,782 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:29:39,782 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:29:39,782 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:29:39,782 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:29:39,782 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:29:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-22 05:29:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:29:39,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:39,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:39,806 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-22 05:29:39,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:39,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564223386] [2020-12-22 05:29:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:39,979 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 05:29:39,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564223386] [2020-12-22 05:29:39,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:39,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:29:39,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686484950] [2020-12-22 05:29:39,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:29:39,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:29:40,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:29:40,007 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-22 05:29:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:40,036 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-22 05:29:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:29:40,038 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:29:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:40,051 INFO L225 Difference]: With dead ends: 79 [2020-12-22 05:29:40,052 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:29:40,057 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 05:29:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:29:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 05:29:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 05:29:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-22 05:29:40,103 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-22 05:29:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:40,104 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-22 05:29:40,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:29:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-22 05:29:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:29:40,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:40,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:40,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:29:40,109 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:40,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:40,111 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:29:40,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:40,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468049398] [2020-12-22 05:29:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:40,255 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 05:29:40,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468049398] [2020-12-22 05:29:40,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:40,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:29:40,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341564948] [2020-12-22 05:29:40,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:29:40,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:40,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:29:40,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:29:40,258 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-22 05:29:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:40,342 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-22 05:29:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:29:40,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-22 05:29:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:40,345 INFO L225 Difference]: With dead ends: 61 [2020-12-22 05:29:40,345 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 05:29:40,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:29:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 05:29:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-12-22 05:29:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 05:29:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-22 05:29:40,354 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-22 05:29:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:40,354 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-22 05:29:40,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:29:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-22 05:29:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:29:40,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:40,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:40,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 05:29:40,356 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:40,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-22 05:29:40,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:40,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145357579] [2020-12-22 05:29:40,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:40,396 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 05:29:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145357579] [2020-12-22 05:29:40,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:40,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:29:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876355986] [2020-12-22 05:29:40,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:29:40,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:29:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:29:40,400 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-22 05:29:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:40,419 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-22 05:29:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:29:40,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 05:29:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:40,421 INFO L225 Difference]: With dead ends: 56 [2020-12-22 05:29:40,421 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:29:40,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 05:29:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:29:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 05:29:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 05:29:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-22 05:29:40,430 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-22 05:29:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:40,430 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-22 05:29:40,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:29:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-22 05:29:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:29:40,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:40,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:40,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 05:29:40,432 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-22 05:29:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:40,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89185856] [2020-12-22 05:29:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:40,510 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 05:29:40,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89185856] [2020-12-22 05:29:40,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:40,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:29:40,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314860566] [2020-12-22 05:29:40,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:29:40,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:29:40,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:29:40,512 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-22 05:29:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:40,632 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-22 05:29:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:29:40,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 05:29:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:40,633 INFO L225 Difference]: With dead ends: 56 [2020-12-22 05:29:40,634 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 05:29:40,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:29:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 05:29:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-22 05:29:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 05:29:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-22 05:29:40,646 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-22 05:29:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:40,647 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-22 05:29:40,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:29:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-22 05:29:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:29:40,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:40,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:40,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 05:29:40,650 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:40,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-22 05:29:40,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:40,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197161366] [2020-12-22 05:29:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:40,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:40,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71732527] [2020-12-22 05:29:40,688 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 05:29:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:40,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:29:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:40,900 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 05:29:40,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197161366] [2020-12-22 05:29:40,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:40,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71732527] [2020-12-22 05:29:40,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:40,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:29:40,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530706893] [2020-12-22 05:29:40,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:29:40,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:40,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:29:40,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:29:40,904 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-12-22 05:29:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:41,155 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-22 05:29:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:29:41,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 05:29:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:41,157 INFO L225 Difference]: With dead ends: 81 [2020-12-22 05:29:41,157 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 05:29:41,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:29:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 05:29:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-22 05:29:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 05:29:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-22 05:29:41,169 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-22 05:29:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:41,169 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-22 05:29:41,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:29:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-22 05:29:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:29:41,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:41,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:41,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:41,385 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:41,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-22 05:29:41,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:41,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417530195] [2020-12-22 05:29:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:41,427 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:41,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907242446] [2020-12-22 05:29:41,427 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 05:29:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:29:41,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:41,638 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 05:29:41,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417530195] [2020-12-22 05:29:41,639 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:41,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907242446] [2020-12-22 05:29:41,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:29:41,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 05:29:41,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50950970] [2020-12-22 05:29:41,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:29:41,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:29:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:29:41,642 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 7 states. [2020-12-22 05:29:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:41,964 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-22 05:29:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:29:41,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 05:29:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:41,966 INFO L225 Difference]: With dead ends: 53 [2020-12-22 05:29:41,966 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 05:29:41,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:29:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 05:29:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 05:29:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 05:29:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-22 05:29:41,974 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 16 [2020-12-22 05:29:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:41,974 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-22 05:29:41,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:29:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-22 05:29:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:29:41,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:41,975 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 05:29:42,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:42,189 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1571159167, now seen corresponding path program 1 times [2020-12-22 05:29:42,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:42,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861317129] [2020-12-22 05:29:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:42,203 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:42,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191693272] [2020-12-22 05:29:42,204 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 05:29:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:29:42,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:42,327 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 05:29:42,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861317129] [2020-12-22 05:29:42,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:42,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191693272] [2020-12-22 05:29:42,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:29:42,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:29:42,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565108968] [2020-12-22 05:29:42,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:29:42,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:29:42,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:29:42,335 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-12-22 05:29:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:42,373 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-22 05:29:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:29:42,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-22 05:29:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:42,375 INFO L225 Difference]: With dead ends: 62 [2020-12-22 05:29:42,375 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 05:29:42,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:29:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 05:29:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 05:29:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 05:29:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-22 05:29:42,397 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 18 [2020-12-22 05:29:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:42,398 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-22 05:29:42,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:29:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-22 05:29:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 05:29:42,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:42,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:42,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:42,614 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-22 05:29:42,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:42,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121971047] [2020-12-22 05:29:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:42,629 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:42,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689809442] [2020-12-22 05:29:42,629 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 05:29:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 05:29:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:29:42,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121971047] [2020-12-22 05:29:42,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:42,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689809442] [2020-12-22 05:29:42,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:29:42,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:29:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499460122] [2020-12-22 05:29:42,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:29:42,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:42,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:29:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:29:42,976 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 8 states. [2020-12-22 05:29:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:43,489 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-12-22 05:29:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:29:43,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-22 05:29:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:43,490 INFO L225 Difference]: With dead ends: 83 [2020-12-22 05:29:43,491 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 05:29:43,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:29:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 05:29:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-12-22 05:29:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 05:29:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-12-22 05:29:43,501 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2020-12-22 05:29:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:43,502 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-12-22 05:29:43,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:29:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-12-22 05:29:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 05:29:43,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:43,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:43,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:43,708 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:43,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1958905870, now seen corresponding path program 1 times [2020-12-22 05:29:43,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:43,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867562471] [2020-12-22 05:29:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:43,721 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:43,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819058771] [2020-12-22 05:29:43,722 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 05:29:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:29:43,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:29:43,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867562471] [2020-12-22 05:29:43,990 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:43,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819058771] [2020-12-22 05:29:43,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:29:43,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:29:43,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212980506] [2020-12-22 05:29:43,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:29:43,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:43,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:29:43,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:29:43,993 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 7 states. [2020-12-22 05:29:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:44,269 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-12-22 05:29:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:29:44,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-22 05:29:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:44,270 INFO L225 Difference]: With dead ends: 74 [2020-12-22 05:29:44,270 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 05:29:44,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:29:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 05:29:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-22 05:29:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 05:29:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-12-22 05:29:44,279 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 24 [2020-12-22 05:29:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:44,279 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-12-22 05:29:44,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:29:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-12-22 05:29:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 05:29:44,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:44,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:44,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:44,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:44,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2020-12-22 05:29:44,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:44,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363493427] [2020-12-22 05:29:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:44,508 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:44,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812601451] [2020-12-22 05:29:44,508 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 05:29:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:44,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:29:44,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:29:44,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363493427] [2020-12-22 05:29:44,627 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:44,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812601451] [2020-12-22 05:29:44,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:29:44,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:29:44,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202036350] [2020-12-22 05:29:44,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:29:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:29:44,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:29:44,635 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 6 states. [2020-12-22 05:29:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:44,659 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-12-22 05:29:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:29:44,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-22 05:29:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:44,660 INFO L225 Difference]: With dead ends: 71 [2020-12-22 05:29:44,660 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 05:29:44,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 05:29:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 05:29:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-22 05:29:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 05:29:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-12-22 05:29:44,668 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 27 [2020-12-22 05:29:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:44,668 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-12-22 05:29:44,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:29:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-12-22 05:29:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 05:29:44,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:44,669 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:44,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:44,884 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1875627766, now seen corresponding path program 1 times [2020-12-22 05:29:44,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:44,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653752921] [2020-12-22 05:29:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:44,898 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:44,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843388467] [2020-12-22 05:29:44,898 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 05:29:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:29:44,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:29:45,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653752921] [2020-12-22 05:29:45,034 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:45,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843388467] [2020-12-22 05:29:45,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:29:45,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:29:45,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350706173] [2020-12-22 05:29:45,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:29:45,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:45,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:29:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:29:45,036 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 6 states. [2020-12-22 05:29:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:45,074 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-12-22 05:29:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:29:45,074 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-22 05:29:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:45,075 INFO L225 Difference]: With dead ends: 94 [2020-12-22 05:29:45,075 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 05:29:45,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 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 05:29:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 05:29:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 05:29:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 05:29:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2020-12-22 05:29:45,082 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 28 [2020-12-22 05:29:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:45,083 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2020-12-22 05:29:45,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:29:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2020-12-22 05:29:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 05:29:45,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:45,084 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:45,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:45,298 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1711245194, now seen corresponding path program 2 times [2020-12-22 05:29:45,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:45,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117060021] [2020-12-22 05:29:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:45,311 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:45,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673735859] [2020-12-22 05:29:45,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:29:45,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:29:45,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:29:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 05:29:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:29:45,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117060021] [2020-12-22 05:29:45,998 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:29:45,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673735859] [2020-12-22 05:29:45,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:29:45,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 05:29:45,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008618748] [2020-12-22 05:29:45,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 05:29:45,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:29:46,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 05:29:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:29:46,004 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 11 states. [2020-12-22 05:29:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:29:46,936 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2020-12-22 05:29:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 05:29:46,937 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-12-22 05:29:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:29:46,938 INFO L225 Difference]: With dead ends: 103 [2020-12-22 05:29:46,938 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 05:29:46,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-22 05:29:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 05:29:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-12-22 05:29:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 05:29:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-12-22 05:29:46,945 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 28 [2020-12-22 05:29:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:29:46,945 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-12-22 05:29:46,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 05:29:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-12-22 05:29:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 05:29:46,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:29:46,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:29:47,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 05:29:47,152 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:29:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:29:47,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1339843922, now seen corresponding path program 1 times [2020-12-22 05:29:47,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:29:47,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170881582] [2020-12-22 05:29:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:29:47,181 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:29:47,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713764423] [2020-12-22 05:29:47,182 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 05:29:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:29:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 05:29:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:29:51,739 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:29:51,782 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:29:51,793 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 05:29:51,931 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:29:52,207 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:29:52,712 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:29:54,267 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:29:55,982 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:29:57,816 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:29:59,484 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:00,480 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:01,375 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:02,679 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:04,131 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:05,288 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:06,236 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:07,333 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:08,213 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:11,855 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:16,325 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:21,281 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:28,498 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:40,624 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:30:59,835 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 05:31:02,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170881582] [2020-12-22 05:31:02,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:31:02,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713764423] [2020-12-22 05:31:02,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 05:31:02,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:31:02,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:31:02,803 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:31:02,803 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:31:03,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:31:03,029 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:31:03,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:31:03 BoogieIcfgContainer [2020-12-22 05:31:03,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:31:03,031 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:31:03,031 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:31:03,031 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:31:03,031 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:29:39" (3/4) ... [2020-12-22 05:31:03,034 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:31:03,035 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:31:03,037 INFO L168 Benchmark]: Toolchain (without parser) took 84485.30 ms. Allocated memory was 174.1 MB in the beginning and 451.9 MB in the end (delta: 277.9 MB). Free memory was 148.8 MB in the beginning and 385.0 MB in the end (delta: -236.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:31:03,037 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 174.1 MB. Free memory is still 145.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:31:03,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.36 ms. Allocated memory is still 174.1 MB. Free memory was 148.6 MB in the beginning and 138.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:31:03,038 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.43 ms. Allocated memory is still 174.1 MB. Free memory was 138.6 MB in the beginning and 137.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:31:03,039 INFO L168 Benchmark]: Boogie Preprocessor took 60.22 ms. Allocated memory is still 174.1 MB. Free memory was 137.0 MB in the beginning and 135.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:31:03,039 INFO L168 Benchmark]: RCFGBuilder took 697.01 ms. Allocated memory is still 174.1 MB. Free memory was 135.7 MB in the beginning and 154.5 MB in the end (delta: -18.8 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:31:03,040 INFO L168 Benchmark]: TraceAbstraction took 83341.56 ms. Allocated memory was 174.1 MB in the beginning and 451.9 MB in the end (delta: 277.9 MB). Free memory was 154.5 MB in the beginning and 385.0 MB in the end (delta: -230.6 MB). Peak memory consumption was 278.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:31:03,040 INFO L168 Benchmark]: Witness Printer took 4.14 ms. Allocated memory is still 451.9 MB. Free memory is still 385.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:31:03,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 174.1 MB. Free memory is still 145.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.36 ms. Allocated memory is still 174.1 MB. Free memory was 148.6 MB in the beginning and 138.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 67.43 ms. Allocated memory is still 174.1 MB. Free memory was 138.6 MB in the beginning and 137.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.22 ms. Allocated memory is still 174.1 MB. Free memory was 137.0 MB in the beginning and 135.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 697.01 ms. Allocated memory is still 174.1 MB. Free memory was 135.7 MB in the beginning and 154.5 MB in the end (delta: -18.8 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 83341.56 ms. Allocated memory was 174.1 MB in the beginning and 451.9 MB in the end (delta: 277.9 MB). Free memory was 154.5 MB in the beginning and 385.0 MB in the end (delta: -230.6 MB). Peak memory consumption was 278.0 MB. Max. memory is 8.0 GB. * Witness Printer took 4.14 ms. Allocated memory is still 451.9 MB. Free memory is still 385.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND TRUE !(r >= d) [L45] EXPR counter++ [L45] COND TRUE counter++<10 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p [L45] EXPR counter++ [L45] COND TRUE counter++<10 [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 83.2s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 394 SDtfs, 783 SDslu, 796 SDs, 0 SdLazy, 633 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 94 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 197 ConstructedInterpolants, 0 QuantifiedInterpolants, 30603 SizeOfPredicates, 44 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 0/59 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...