/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:59:53,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:59:53,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:59:53,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:59:53,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:59:53,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:59:53,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:59:53,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:59:53,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:59:53,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:59:53,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:59:53,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:59:53,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:59:53,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:59:53,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:59:53,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:59:53,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:59:53,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:59:53,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:59:53,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:59:53,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:59:53,148 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:59:53,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:59:53,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:59:53,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:59:53,151 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:59:53,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:59:53,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:59:53,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:59:53,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:59:53,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:59:53,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:59:53,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:59:53,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:59:53,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:59:53,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:59:53,154 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:59:53,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:59:53,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:59:53,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:59:53,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:59:53,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:59:53,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:59:53,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:59:53,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:59:53,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:59:53,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:59:53,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:59:53,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:59:53,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:59:53,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:59:53,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:59:53,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:59:53,517 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:59:53,519 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:59:53,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-05-02 14:59:53,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4555ab023/f18f94ef662c479fb9426e9b293223e6/FLAG0630cc53a [2021-05-02 14:59:53,994 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:59:53,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-05-02 14:59:54,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4555ab023/f18f94ef662c479fb9426e9b293223e6/FLAG0630cc53a [2021-05-02 14:59:54,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4555ab023/f18f94ef662c479fb9426e9b293223e6 [2021-05-02 14:59:54,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:59:54,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:59:54,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:59:54,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:59:54,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:59:54,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d59840b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54, skipping insertion in model container [2021-05-02 14:59:54,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:59:54,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:59:54,207 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2021-05-02 14:59:54,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:59:54,282 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:59:54,293 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2021-05-02 14:59:54,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:59:54,329 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:59:54,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54 WrapperNode [2021-05-02 14:59:54,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:59:54,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:59:54,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:59:54,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:59:54,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (1/1) ... [2021-05-02 14:59:54,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:59:54,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:59:54,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:59:54,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:59:54,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:59:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:59:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:59:54,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:59:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:59:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:59:54,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:59:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:59:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:59:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:59:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:59:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:59:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:59:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:59:54,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:59:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:59:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:59:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:59:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:59:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:59:54,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:59:54,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:59:54,708 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 14:59:54,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:59:54 BoogieIcfgContainer [2021-05-02 14:59:54,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:59:54,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:59:54,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:59:54,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:59:54,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:59:54" (1/3) ... [2021-05-02 14:59:54,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a66100c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:59:54, skipping insertion in model container [2021-05-02 14:59:54,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:59:54" (2/3) ... [2021-05-02 14:59:54,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a66100c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:59:54, skipping insertion in model container [2021-05-02 14:59:54,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:59:54" (3/3) ... [2021-05-02 14:59:54,715 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2021-05-02 14:59:54,720 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:59:54,723 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:59:54,737 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:59:54,755 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:59:54,756 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:59:54,756 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:59:54,756 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:59:54,756 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:59:54,756 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:59:54,756 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:59:54,756 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:59:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:59:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:59:54,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:54,773 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:54,774 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:54,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-05-02 14:59:54,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:54,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348875094] [2021-05-02 14:59:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:55,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:59:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:55,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:59:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:55,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:59:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:55,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:55,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348875094] [2021-05-02 14:59:55,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348875094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:55,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:55,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:59:55,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84058610] [2021-05-02 14:59:55,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:59:55,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:59:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:59:55,067 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:55,271 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-02 14:59:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:59:55,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 14:59:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:55,279 INFO L225 Difference]: With dead ends: 74 [2021-05-02 14:59:55,279 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 14:59:55,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:59:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 14:59:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 14:59:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:59:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 14:59:55,325 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 14:59:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:55,325 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 14:59:55,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 14:59:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:59:55,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:55,327 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:55,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:59:55,327 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:55,328 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-05-02 14:59:55,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:55,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798872118] [2021-05-02 14:59:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:55,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:55,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763663514] [2021-05-02 14:59:55,362 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 [2021-05-02 14:59:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:59:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:55,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:55,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:55,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798872118] [2021-05-02 14:59:55,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:55,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763663514] [2021-05-02 14:59:55,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763663514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:55,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:55,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:59:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272614672] [2021-05-02 14:59:55,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:59:55,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:59:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:59:55,558 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:55,597 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-05-02 14:59:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:59:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:59:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:55,599 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:59:55,599 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 14:59:55,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:59:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 14:59:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 14:59:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:59:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 14:59:55,607 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 14:59:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:55,608 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 14:59:55,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 14:59:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 14:59:55,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:55,609 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:55,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:59:55,831 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2021-05-02 14:59:55,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:55,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113584210] [2021-05-02 14:59:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:55,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:55,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312205501] [2021-05-02 14:59:55,862 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 [2021-05-02 14:59:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:55,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:59:55,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:56,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:59:56,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113584210] [2021-05-02 14:59:56,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:56,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312205501] [2021-05-02 14:59:56,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312205501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:56,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:56,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:59:56,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498185510] [2021-05-02 14:59:56,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:59:56,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:56,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:59:56,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:56,027 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:59:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:56,123 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-05-02 14:59:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:59:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 14:59:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:56,125 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:59:56,126 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 14:59:56,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 14:59:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 14:59:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:59:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 14:59:56,134 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 14:59:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:56,135 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 14:59:56,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:59:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 14:59:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:59:56,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:56,136 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:56,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:56,353 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:56,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2021-05-02 14:59:56,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:56,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583963660] [2021-05-02 14:59:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:56,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:56,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364707230] [2021-05-02 14:59:56,379 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 [2021-05-02 14:59:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:56,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:59:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:56,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:56,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:56,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583963660] [2021-05-02 14:59:56,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:56,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364707230] [2021-05-02 14:59:56,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364707230] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:56,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:56,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:59:56,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141498562] [2021-05-02 14:59:56,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:59:56,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:56,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:59:56,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:59:56,581 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:56,608 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-05-02 14:59:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:59:56,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:59:56,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:56,614 INFO L225 Difference]: With dead ends: 62 [2021-05-02 14:59:56,614 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 14:59:56,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:59:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 14:59:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 14:59:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:59:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 14:59:56,630 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2021-05-02 14:59:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:56,630 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 14:59:56,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 14:59:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:59:56,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:56,631 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:56,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:56,832 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash 795698770, now seen corresponding path program 1 times [2021-05-02 14:59:56,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:56,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732359356] [2021-05-02 14:59:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:56,860 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:56,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960024787] [2021-05-02 14:59:56,861 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 [2021-05-02 14:59:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:59:56,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:56,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:56,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:57,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:57,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732359356] [2021-05-02 14:59:57,074 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960024787] [2021-05-02 14:59:57,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960024787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:57,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:57,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:59:57,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958229415] [2021-05-02 14:59:57,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:59:57,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:57,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:59:57,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:59:57,076 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:57,173 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-05-02 14:59:57,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:59:57,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:59:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:57,175 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:59:57,175 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 14:59:57,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:59:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 14:59:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 14:59:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:59:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-05-02 14:59:57,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2021-05-02 14:59:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:57,185 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-05-02 14:59:57,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-05-02 14:59:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 14:59:57,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:57,186 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:57,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:57,397 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:57,398 INFO L82 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2021-05-02 14:59:57,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:57,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652561603] [2021-05-02 14:59:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:57,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:57,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317523929] [2021-05-02 14:59:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 14:59:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:57,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:59:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:57,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:57,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:57,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652561603] [2021-05-02 14:59:57,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:57,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317523929] [2021-05-02 14:59:57,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317523929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:57,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:57,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:59:57,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187465930] [2021-05-02 14:59:57,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:59:57,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:57,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:59:57,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:57,604 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:57,657 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-05-02 14:59:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:59:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-05-02 14:59:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:57,659 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:59:57,659 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 14:59:57,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:59:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 14:59:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 14:59:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:59:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-05-02 14:59:57,668 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2021-05-02 14:59:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:57,669 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-05-02 14:59:57,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-05-02 14:59:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:59:57,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:57,670 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:57,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:59:57,877 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:57,877 INFO L82 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2021-05-02 14:59:57,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:57,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420623548] [2021-05-02 14:59:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:57,888 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:57,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910599538] [2021-05-02 14:59:57,889 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 [2021-05-02 14:59:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:57,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:59:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:57,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:57,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:59:58,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:58,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420623548] [2021-05-02 14:59:58,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:58,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910599538] [2021-05-02 14:59:58,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910599538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:58,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:58,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:58,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700846605] [2021-05-02 14:59:58,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:58,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:58,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:58,045 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:58,251 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2021-05-02 14:59:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:59:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-05-02 14:59:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:58,253 INFO L225 Difference]: With dead ends: 138 [2021-05-02 14:59:58,253 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 14:59:58,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:59:58,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 14:59:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2021-05-02 14:59:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:59:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2021-05-02 14:59:58,267 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2021-05-02 14:59:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:58,268 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2021-05-02 14:59:58,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2021-05-02 14:59:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:59:58,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:58,269 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:58,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:58,470 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash 495607521, now seen corresponding path program 1 times [2021-05-02 14:59:58,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:58,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286890844] [2021-05-02 14:59:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:58,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:58,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935431161] [2021-05-02 14:59:58,492 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 [2021-05-02 14:59:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:59:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:58,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:59:58,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:58,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286890844] [2021-05-02 14:59:58,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:58,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935431161] [2021-05-02 14:59:58,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935431161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:58,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:58,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:59:58,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616995806] [2021-05-02 14:59:58,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:59:58,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:58,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:59:58,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:58,677 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:59:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:58,777 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-05-02 14:59:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:59:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 14:59:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:58,779 INFO L225 Difference]: With dead ends: 95 [2021-05-02 14:59:58,779 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 14:59:58,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:59:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 14:59:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 14:59:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3478260869565217) internal successors, (93), 70 states have internal predecessors, (93), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:59:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-05-02 14:59:58,805 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 34 [2021-05-02 14:59:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:58,806 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-05-02 14:59:58,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:59:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-05-02 14:59:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:59:58,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:58,807 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:59,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:59,008 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:59,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2021-05-02 14:59:59,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:59,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866100493] [2021-05-02 14:59:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:59,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:59,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490709003] [2021-05-02 14:59:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:59,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:59:59,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:59,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:59,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866100493] [2021-05-02 14:59:59,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:59,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490709003] [2021-05-02 14:59:59,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490709003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:59:59,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:59:59,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:59:59,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000655639] [2021-05-02 14:59:59,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:59:59,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:59:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:59,206 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:59,237 INFO L93 Difference]: Finished difference Result 135 states and 184 transitions. [2021-05-02 14:59:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:59:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-05-02 14:59:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:59,241 INFO L225 Difference]: With dead ends: 135 [2021-05-02 14:59:59,241 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 14:59:59,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:59:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 14:59:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 14:59:59,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 72 states have internal predecessors, (95), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:59:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2021-05-02 14:59:59,255 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 35 [2021-05-02 14:59:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:59,256 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2021-05-02 14:59:59,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2021-05-02 14:59:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:59:59,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:59,257 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:59,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:59:59,458 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2021-05-02 14:59:59,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:59,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074234040] [2021-05-02 14:59:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:59,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:59,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522017375] [2021-05-02 14:59:59,468 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 [2021-05-02 14:59:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:59:59,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:59:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:59:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:59:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:59:59,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:59:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074234040] [2021-05-02 14:59:59,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:59:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522017375] [2021-05-02 14:59:59,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522017375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:59:59,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:59:59,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:59:59,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921094918] [2021-05-02 14:59:59,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:59:59,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:59:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:59:59,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:59:59,646 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:59:59,705 INFO L93 Difference]: Finished difference Result 171 states and 233 transitions. [2021-05-02 14:59:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:59:59,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 14:59:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:59:59,707 INFO L225 Difference]: With dead ends: 171 [2021-05-02 14:59:59,707 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 14:59:59,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:59:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 14:59:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-05-02 14:59:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 14:59:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2021-05-02 14:59:59,725 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 36 [2021-05-02 14:59:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:59:59,726 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2021-05-02 14:59:59,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:59:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2021-05-02 14:59:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:59:59,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:59:59,730 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:59:59,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:59:59,945 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:59:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:59:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2021-05-02 14:59:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:59:59,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211791443] [2021-05-02 14:59:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:59:59,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:59:59,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015355897] [2021-05-02 14:59:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:00,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:00:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:00,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:00:00,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:00,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211791443] [2021-05-02 15:00:00,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:00,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015355897] [2021-05-02 15:00:00,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015355897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:00,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:00,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:00,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234710279] [2021-05-02 15:00:00,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:00,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:00,167 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:00,309 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2021-05-02 15:00:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:00:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:00,310 INFO L225 Difference]: With dead ends: 154 [2021-05-02 15:00:00,310 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:00:00,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:00:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-05-02 15:00:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 15:00:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2021-05-02 15:00:00,322 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2021-05-02 15:00:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:00,322 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2021-05-02 15:00:00,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2021-05-02 15:00:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:00:00,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:00,323 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:00,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:00,537 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 2 times [2021-05-02 15:00:00,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:00,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612157582] [2021-05-02 15:00:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:00,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:00,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827296779] [2021-05-02 15:00:00,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:00:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:00,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:00,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:00,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612157582] [2021-05-02 15:00:00,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:00,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827296779] [2021-05-02 15:00:00,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827296779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:00,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:00,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:00,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779365627] [2021-05-02 15:00:00,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:00,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:00,728 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:00,811 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2021-05-02 15:00:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:00,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-05-02 15:00:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:00,813 INFO L225 Difference]: With dead ends: 189 [2021-05-02 15:00:00,814 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 15:00:00,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 15:00:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-05-02 15:00:00,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.31496062992126) internal successors, (167), 129 states have internal predecessors, (167), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 15:00:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 231 transitions. [2021-05-02 15:00:00,825 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 231 transitions. Word has length 37 [2021-05-02 15:00:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:00,826 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 231 transitions. [2021-05-02 15:00:00,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 231 transitions. [2021-05-02 15:00:00,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:00:00,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:00,827 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:01,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:00:01,041 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2021-05-02 15:00:01,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:01,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013841536] [2021-05-02 15:00:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:01,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:01,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112480774] [2021-05-02 15:00:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:01,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 15:00:01,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013841536] [2021-05-02 15:00:01,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112480774] [2021-05-02 15:00:01,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112480774] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:01,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:01,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:00:01,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090279422] [2021-05-02 15:00:01,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:01,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:01,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:01,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:01,218 INFO L87 Difference]: Start difference. First operand 173 states and 231 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:01,355 INFO L93 Difference]: Finished difference Result 195 states and 258 transitions. [2021-05-02 15:00:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:01,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 15:00:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:01,358 INFO L225 Difference]: With dead ends: 195 [2021-05-02 15:00:01,359 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 15:00:01,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 15:00:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 15:00:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 141 states have internal predecessors, (181), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 15:00:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 253 transitions. [2021-05-02 15:00:01,372 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 253 transitions. Word has length 39 [2021-05-02 15:00:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:01,372 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 253 transitions. [2021-05-02 15:00:01,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:00:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 253 transitions. [2021-05-02 15:00:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:00:01,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:01,373 INFO L523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:01,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:00:01,597 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2021-05-02 15:00:01,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:01,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149223627] [2021-05-02 15:00:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:01,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:01,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834501209] [2021-05-02 15:00:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:01,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:00:01,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:00:01,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149223627] [2021-05-02 15:00:01,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834501209] [2021-05-02 15:00:01,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834501209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:01,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:01,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:01,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545957517] [2021-05-02 15:00:01,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:01,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:01,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:01,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:01,850 INFO L87 Difference]: Start difference. First operand 192 states and 253 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:00:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:02,074 INFO L93 Difference]: Finished difference Result 200 states and 260 transitions. [2021-05-02 15:00:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:02,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 15:00:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:02,076 INFO L225 Difference]: With dead ends: 200 [2021-05-02 15:00:02,076 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 15:00:02,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 15:00:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2021-05-02 15:00:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 142 states have (on average 1.295774647887324) internal successors, (184), 144 states have internal predecessors, (184), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 15:00:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2021-05-02 15:00:02,090 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 41 [2021-05-02 15:00:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:02,090 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2021-05-02 15:00:02,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:00:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2021-05-02 15:00:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 15:00:02,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:02,091 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:02,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:00:02,310 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2021-05-02 15:00:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:02,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511689615] [2021-05-02 15:00:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:02,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:02,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109294330] [2021-05-02 15:00:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:00:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:02,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 15:00:02,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:02,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511689615] [2021-05-02 15:00:02,467 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:02,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109294330] [2021-05-02 15:00:02,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109294330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:02,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:02,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:00:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729218899] [2021-05-02 15:00:02,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:00:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:00:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:02,468 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:00:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:02,547 INFO L93 Difference]: Finished difference Result 260 states and 359 transitions. [2021-05-02 15:00:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:00:02,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-05-02 15:00:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:02,550 INFO L225 Difference]: With dead ends: 260 [2021-05-02 15:00:02,550 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 15:00:02,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 15:00:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-05-02 15:00:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 155 states have (on average 1.2967741935483872) internal successors, (201), 162 states have internal predecessors, (201), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 15:00:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 313 transitions. [2021-05-02 15:00:02,568 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 313 transitions. Word has length 44 [2021-05-02 15:00:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:02,568 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 313 transitions. [2021-05-02 15:00:02,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:00:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 313 transitions. [2021-05-02 15:00:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:00:02,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:02,569 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:02,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:02,793 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:02,793 INFO L82 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2021-05-02 15:00:02,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:02,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909779401] [2021-05-02 15:00:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:02,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:02,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997711046] [2021-05-02 15:00:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:00:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:02,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:00:02,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:02,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909779401] [2021-05-02 15:00:02,974 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:02,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997711046] [2021-05-02 15:00:02,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997711046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:02,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:02,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:02,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142805733] [2021-05-02 15:00:02,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:02,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:02,976 INFO L87 Difference]: Start difference. First operand 230 states and 313 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:03,085 INFO L93 Difference]: Finished difference Result 379 states and 536 transitions. [2021-05-02 15:00:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:03,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-05-02 15:00:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:03,088 INFO L225 Difference]: With dead ends: 379 [2021-05-02 15:00:03,088 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 15:00:03,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 15:00:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2021-05-02 15:00:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 162 states have (on average 1.2839506172839505) internal successors, (208), 168 states have internal predecessors, (208), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 15:00:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2021-05-02 15:00:03,106 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 42 [2021-05-02 15:00:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:03,106 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2021-05-02 15:00:03,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:00:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2021-05-02 15:00:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:00:03,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:03,107 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:03,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:00:03,329 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1912500411, now seen corresponding path program 2 times [2021-05-02 15:00:03,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:03,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798824903] [2021-05-02 15:00:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:03,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:03,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843241362] [2021-05-02 15:00:03,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:03,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:00:03,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:00:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:00:03,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:03,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 15:00:03,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:03,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798824903] [2021-05-02 15:00:03,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:03,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843241362] [2021-05-02 15:00:03,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843241362] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:03,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:03,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:00:03,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348845606] [2021-05-02 15:00:03,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:00:03,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:03,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:00:03,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:00:03,488 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:00:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:03,585 INFO L93 Difference]: Finished difference Result 445 states and 659 transitions. [2021-05-02 15:00:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:03,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-05-02 15:00:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:03,588 INFO L225 Difference]: With dead ends: 445 [2021-05-02 15:00:03,588 INFO L226 Difference]: Without dead ends: 375 [2021-05-02 15:00:03,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:00:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-02 15:00:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 261. [2021-05-02 15:00:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 186 states have (on average 1.3010752688172043) internal successors, (242), 192 states have internal predecessors, (242), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 15:00:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 354 transitions. [2021-05-02 15:00:03,613 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 354 transitions. Word has length 43 [2021-05-02 15:00:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:03,613 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 354 transitions. [2021-05-02 15:00:03,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:00:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 354 transitions. [2021-05-02 15:00:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:00:03,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:03,614 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:03,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:00:03,837 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:03,837 INFO L82 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2021-05-02 15:00:03,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:03,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386781042] [2021-05-02 15:00:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:03,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:03,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226418375] [2021-05-02 15:00:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:00:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:03,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:03,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 15:00:04,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:04,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386781042] [2021-05-02 15:00:04,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:04,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226418375] [2021-05-02 15:00:04,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226418375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:04,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:04,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:00:04,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342073211] [2021-05-02 15:00:04,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:04,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:04,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:04,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:04,040 INFO L87 Difference]: Start difference. First operand 261 states and 354 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:04,390 INFO L93 Difference]: Finished difference Result 337 states and 476 transitions. [2021-05-02 15:00:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:00:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-05-02 15:00:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:04,393 INFO L225 Difference]: With dead ends: 337 [2021-05-02 15:00:04,393 INFO L226 Difference]: Without dead ends: 335 [2021-05-02 15:00:04,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:00:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-02 15:00:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 292. [2021-05-02 15:00:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 200 states have (on average 1.315) internal successors, (263), 208 states have internal predecessors, (263), 73 states have call successors, (73), 19 states have call predecessors, (73), 18 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 15:00:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 407 transitions. [2021-05-02 15:00:04,416 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 407 transitions. Word has length 46 [2021-05-02 15:00:04,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:04,416 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 407 transitions. [2021-05-02 15:00:04,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 407 transitions. [2021-05-02 15:00:04,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 15:00:04,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:04,417 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:04,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:00:04,640 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:04,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:04,640 INFO L82 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2021-05-02 15:00:04,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:04,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112170330] [2021-05-02 15:00:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:04,647 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:04,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718667707] [2021-05-02 15:00:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:04,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 15:00:04,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:04,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:04,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:05,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:05,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:00:05,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112170330] [2021-05-02 15:00:05,092 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718667707] [2021-05-02 15:00:05,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718667707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:05,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:05,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 15:00:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855162581] [2021-05-02 15:00:05,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 15:00:05,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 15:00:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:00:05,093 INFO L87 Difference]: Start difference. First operand 292 states and 407 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:05,673 INFO L93 Difference]: Finished difference Result 421 states and 594 transitions. [2021-05-02 15:00:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:00:05,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2021-05-02 15:00:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:05,676 INFO L225 Difference]: With dead ends: 421 [2021-05-02 15:00:05,676 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 15:00:05,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 15:00:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 15:00:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2021-05-02 15:00:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 226 states have internal predecessors, (285), 81 states have call successors, (81), 21 states have call predecessors, (81), 20 states have return successors, (79), 71 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 15:00:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2021-05-02 15:00:05,705 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 58 [2021-05-02 15:00:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:05,705 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2021-05-02 15:00:05,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:00:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2021-05-02 15:00:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 15:00:05,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:05,706 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:05,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:05,921 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:05,921 INFO L82 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2021-05-02 15:00:05,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:05,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675015972] [2021-05-02 15:00:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:05,928 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:05,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145814591] [2021-05-02 15:00:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:00:05,995 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:00:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:00:06,026 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:00:06,154 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:00:06,154 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:00:06,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:06,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:00:06 BoogieIcfgContainer [2021-05-02 15:00:06,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:00:06,434 INFO L168 Benchmark]: Toolchain (without parser) took 12404.96 ms. Allocated memory was 198.2 MB in the beginning and 316.7 MB in the end (delta: 118.5 MB). Free memory was 163.0 MB in the beginning and 207.3 MB in the end (delta: -44.3 MB). Peak memory consumption was 74.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:06,434 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 198.2 MB. Free memory is still 179.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:00:06,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.30 ms. Allocated memory is still 198.2 MB. Free memory was 162.8 MB in the beginning and 180.7 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:06,434 INFO L168 Benchmark]: Boogie Preprocessor took 42.14 ms. Allocated memory is still 198.2 MB. Free memory was 180.7 MB in the beginning and 179.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:06,434 INFO L168 Benchmark]: RCFGBuilder took 336.16 ms. Allocated memory is still 198.2 MB. Free memory was 179.0 MB in the beginning and 161.5 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:06,434 INFO L168 Benchmark]: TraceAbstraction took 11722.56 ms. Allocated memory was 198.2 MB in the beginning and 316.7 MB in the end (delta: 118.5 MB). Free memory was 160.8 MB in the beginning and 207.3 MB in the end (delta: -46.5 MB). Peak memory consumption was 71.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:06,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 198.2 MB. Free memory is still 179.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 297.30 ms. Allocated memory is still 198.2 MB. Free memory was 162.8 MB in the beginning and 180.7 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.14 ms. Allocated memory is still 198.2 MB. Free memory was 180.7 MB in the beginning and 179.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 336.16 ms. Allocated memory is still 198.2 MB. Free memory was 179.0 MB in the beginning and 161.5 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11722.56 ms. Allocated memory was 198.2 MB in the beginning and 316.7 MB in the end (delta: 118.5 MB). Free memory was 160.8 MB in the beginning and 207.3 MB in the end (delta: -46.5 MB). Peak memory consumption was 71.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=17, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=2, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11602.1ms, OverallIterations: 20, TraceHistogramMax: 5, EmptinessCheckTime: 22.9ms, AutomataDifference: 2813.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 939 SDtfs, 931 SDslu, 3440 SDs, 0 SdLazy, 1708 SolverSat, 388 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1395.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 699 GetRequests, 542 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1297.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=319occurred in iteration=19, InterpolantAutomatonStates: 158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 303.2ms AutomataMinimizationTime, 19 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 197.0ms SsaConstructionTime, 526.5ms SatisfiabilityAnalysisTime, 2609.3ms InterpolantComputationTime, 742 NumberOfCodeBlocks, 742 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 660 ConstructedInterpolants, 0 QuantifiedInterpolants, 2808 SizeOfPredicates, 67 NumberOfNonLiveVariables, 3220 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 19 InterpolantComputations, 8 PerfectInterpolantSequences, 163/242 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...