/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/hard2_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:38:35,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:38:35,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:38:35,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:38:35,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:38:35,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:38:35,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:38:35,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:38:35,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:38:35,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:38:35,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:38:35,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:38:35,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:38:35,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:38:35,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:38:35,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:38:35,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:38:35,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:38:35,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:38:35,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:38:35,697 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 15:38:35,726 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:38:35,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:38:35,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:38:35,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:38:35,729 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:38:35,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:38:35,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:38:35,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:38:35,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:38:35,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:38:35,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:38:35,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:38:35,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:38:35,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:38:35,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:38:35,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:38:35,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:38:35,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:38:35,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:38:35,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:38:35,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:38:35,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:38:35,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:38:35,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:38:35,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:38:35,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:38:35,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:38:35,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:38:35,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:38:35,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:38:36,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:38:36,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:38:36,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:38:36,004 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:38:36,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c [2021-05-02 15:38:36,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61f63096/bb275d97e7f3455eaa36be09d627f72d/FLAGfe84a2aaf [2021-05-02 15:38:36,383 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:38:36,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound2.c [2021-05-02 15:38:36,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61f63096/bb275d97e7f3455eaa36be09d627f72d/FLAGfe84a2aaf [2021-05-02 15:38:36,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61f63096/bb275d97e7f3455eaa36be09d627f72d [2021-05-02 15:38:36,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:38:36,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:38:36,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:38:36,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:38:36,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:38:36,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473f17ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36, skipping insertion in model container [2021-05-02 15:38:36,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:38:36,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:38:36,540 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/hard2_unwindbound2.c[526,539] [2021-05-02 15:38:36,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:38:36,557 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:38:36,566 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/hard2_unwindbound2.c[526,539] [2021-05-02 15:38:36,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:38:36,579 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:38:36,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36 WrapperNode [2021-05-02 15:38:36,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:38:36,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:38:36,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:38:36,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:38:36,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (1/1) ... [2021-05-02 15:38:36,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:38:36,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:38:36,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:38:36,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:38:36,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (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 15:38:36,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:38:36,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:38:36,708 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:38:36,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:38:36,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:38:36,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:38:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:38:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:38:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:38:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:38:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:38:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:38:36,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:38:36,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:38:36,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:38:36,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:38:36,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:38:36,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:38:36,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:38:36,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:38:36,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:38:36,976 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:38:36,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:38:36 BoogieIcfgContainer [2021-05-02 15:38:36,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:38:36,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:38:36,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:38:36,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:38:36,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:38:36" (1/3) ... [2021-05-02 15:38:36,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@986cba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:38:36, skipping insertion in model container [2021-05-02 15:38:36,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:38:36" (2/3) ... [2021-05-02 15:38:36,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@986cba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:38:36, skipping insertion in model container [2021-05-02 15:38:36,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:38:36" (3/3) ... [2021-05-02 15:38:36,985 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.c [2021-05-02 15:38:36,991 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:38:36,993 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:38:37,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:38:37,018 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:38:37,019 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:38:37,019 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:38:37,019 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:38:37,019 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:38:37,019 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:38:37,019 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:38:37,019 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:38:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:38:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:38:37,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:37,032 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:37,033 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2021-05-02 15:38:37,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:37,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952644326] [2021-05-02 15:38:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:37,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:38:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:38:37,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952644326] [2021-05-02 15:38:37,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952644326] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:38:37,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:38:37,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:38:37,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203467999] [2021-05-02 15:38:37,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:38:37,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:38:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:38:37,272 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:38:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:37,436 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2021-05-02 15:38:37,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:38:37,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:38:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:37,443 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:38:37,443 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:38:37,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:38:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:38:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 15:38:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:38:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-05-02 15:38:37,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2021-05-02 15:38:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:37,474 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-05-02 15:38:37,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:38:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-05-02 15:38:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:38:37,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:37,475 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:37,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:38:37,475 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:37,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2021-05-02 15:38:37,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:37,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85749113] [2021-05-02 15:38:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:37,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:38:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:38:37,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:37,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85749113] [2021-05-02 15:38:37,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85749113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:38:37,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:38:37,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:38:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116331117] [2021-05-02 15:38:37,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:38:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:38:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:38:37,622 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:38:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:37,879 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-05-02 15:38:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:38:37,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:38:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:37,881 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:38:37,881 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 15:38:37,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:38:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 15:38:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-02 15:38:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 15:38:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 15:38:37,888 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2021-05-02 15:38:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:37,888 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 15:38:37,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:38:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 15:38:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 15:38:37,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:37,889 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:37,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:38:37,890 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2021-05-02 15:38:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:37,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910700375] [2021-05-02 15:38:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:37,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:38:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:38:37,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:37,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910700375] [2021-05-02 15:38:37,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910700375] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:38:37,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:38:37,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:38:37,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778154958] [2021-05-02 15:38:37,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:38:37,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:37,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:38:37,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:38:37,979 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:38:38,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:38,088 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-05-02 15:38:38,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:38:38,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 15:38:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:38,089 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:38:38,089 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:38:38,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:38:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:38:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:38:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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 15:38:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 15:38:38,095 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2021-05-02 15:38:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:38,095 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 15:38:38,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:38:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 15:38:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 15:38:38,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:38,096 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:38,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:38:38,096 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:38,096 INFO L82 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2021-05-02 15:38:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:38,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394859436] [2021-05-02 15:38:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:38,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:38:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:38,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-02 15:38:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:38:38,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:38,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394859436] [2021-05-02 15:38:38,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394859436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:38:38,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:38:38,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:38:38,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308713163] [2021-05-02 15:38:38,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:38:38,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:38:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:38:38,178 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:38:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:38,355 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:38:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:38:38,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 15:38:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:38,357 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:38:38,357 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:38:38,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:38:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:38:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-02 15:38:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:38:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-05-02 15:38:38,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2021-05-02 15:38:38,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:38,373 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-05-02 15:38:38,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:38:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-05-02 15:38:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:38:38,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:38,374 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:38,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:38:38,374 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:38,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2021-05-02 15:38:38,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:38,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487885038] [2021-05-02 15:38:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:38,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:38:38,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573688930] [2021-05-02 15:38:38,383 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 15:38:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:38:38,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:38:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:38:38,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:38,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487885038] [2021-05-02 15:38:38,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:38:38,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573688930] [2021-05-02 15:38:38,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573688930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:38:38,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:38:38,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:38:38,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114076670] [2021-05-02 15:38:38,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:38:38,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:38:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:38:38,600 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:38:38,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:38,717 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2021-05-02 15:38:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:38:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 15:38:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:38,719 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:38:38,719 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 15:38:38,720 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:38:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 15:38:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 15:38:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:38:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 15:38:38,733 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 22 [2021-05-02 15:38:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:38,734 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 15:38:38,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:38:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 15:38:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:38:38,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:38,738 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:38,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:38:38,957 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:38,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:38,957 INFO L82 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2021-05-02 15:38:38,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:38,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125473379] [2021-05-02 15:38:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:38,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:38:38,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843642363] [2021-05-02 15:38:38,968 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 15:38:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:38:39,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:38:39,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:38:39,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:39,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125473379] [2021-05-02 15:38:39,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:38:39,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843642363] [2021-05-02 15:38:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843642363] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:38:39,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:38:39,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:38:39,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558654440] [2021-05-02 15:38:39,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:38:39,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:38:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:38:39,117 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:38:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:39,137 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-05-02 15:38:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:38:39,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 15:38:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:39,139 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:38:39,139 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 15:38:39,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:38:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 15:38:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-02 15:38:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:38:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-05-02 15:38:39,145 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2021-05-02 15:38:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:39,145 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-05-02 15:38:39,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:38:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-05-02 15:38:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:38:39,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:39,146 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:39,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:38:39,364 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:39,364 INFO L82 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2021-05-02 15:38:39,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:39,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146984770] [2021-05-02 15:38:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:39,371 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:38:39,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815448725] [2021-05-02 15:38:39,371 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 15:38:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:38:39,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:38:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 15:38:39,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:39,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146984770] [2021-05-02 15:38:39,494 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:38:39,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815448725] [2021-05-02 15:38:39,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815448725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:38:39,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:38:39,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:38:39,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622222060] [2021-05-02 15:38:39,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:38:39,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:38:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:38:39,496 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:38:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:39,569 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-05-02 15:38:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:38:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 15:38:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:39,571 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:38:39,571 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 15:38:39,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:38:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 15:38:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 15:38:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:38:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-05-02 15:38:39,588 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2021-05-02 15:38:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:39,588 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-05-02 15:38:39,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:38:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-05-02 15:38:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:38:39,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:39,590 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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 15:38:39,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:38:39,800 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2021-05-02 15:38:39,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:39,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587409158] [2021-05-02 15:38:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:39,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:38:39,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938548647] [2021-05-02 15:38:39,807 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 15:38:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:38:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:38:39,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:38:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-02 15:38:39,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:39,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587409158] [2021-05-02 15:38:39,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:38:39,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938548647] [2021-05-02 15:38:39,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938548647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:38:39,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:38:39,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:38:39,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077525248] [2021-05-02 15:38:39,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:38:39,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:39,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:38:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:38:39,938 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:38:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:39,965 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2021-05-02 15:38:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:38:39,966 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 15:38:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:39,967 INFO L225 Difference]: With dead ends: 90 [2021-05-02 15:38:39,967 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 15:38:39,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:38:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 15:38:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 15:38:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:38:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-05-02 15:38:39,973 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2021-05-02 15:38:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:39,973 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-05-02 15:38:39,973 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:38:39,973 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-05-02 15:38:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 15:38:39,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:39,974 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:40,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:38:40,189 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2021-05-02 15:38:40,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:40,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2293781] [2021-05-02 15:38:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:40,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:38:40,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981418356] [2021-05-02 15:38:40,202 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 15:38:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:38:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:38:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:38:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:38:40,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:38:40,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2293781] [2021-05-02 15:38:40,355 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:38:40,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981418356] [2021-05-02 15:38:40,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981418356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:38:40,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:38:40,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:38:40,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049140683] [2021-05-02 15:38:40,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:38:40,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:38:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:38:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:38:40,357 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:38:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:38:40,510 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2021-05-02 15:38:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:38:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-02 15:38:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:38:40,512 INFO L225 Difference]: With dead ends: 117 [2021-05-02 15:38:40,512 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 15:38:40,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:38:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 15:38:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 15:38:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 54 states have internal predecessors, (63), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:38:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-05-02 15:38:40,519 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 40 [2021-05-02 15:38:40,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:38:40,519 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-05-02 15:38:40,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:38:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-05-02 15:38:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 15:38:40,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:38:40,520 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:38:40,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:38:40,729 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:38:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:38:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash 529029787, now seen corresponding path program 1 times [2021-05-02 15:38:40,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:38:40,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893506513] [2021-05-02 15:38:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:38:40,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:38:40,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082341665] [2021-05-02 15:38:40,751 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 15:38:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:38:40,793 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:38:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:38:40,806 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:38:40,842 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:38:40,842 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:38:41,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:38:41,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:38:41 BoogieIcfgContainer [2021-05-02 15:38:41,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:38:41,080 INFO L168 Benchmark]: Toolchain (without parser) took 4672.56 ms. Allocated memory was 187.7 MB in the beginning and 232.8 MB in the end (delta: 45.1 MB). Free memory was 152.0 MB in the beginning and 97.8 MB in the end (delta: 54.2 MB). Peak memory consumption was 100.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:41,080 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:38:41,080 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.45 ms. Allocated memory is still 187.7 MB. Free memory was 151.9 MB in the beginning and 142.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:41,080 INFO L168 Benchmark]: Boogie Preprocessor took 62.90 ms. Allocated memory is still 187.7 MB. Free memory was 142.0 MB in the beginning and 170.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:41,080 INFO L168 Benchmark]: RCFGBuilder took 333.69 ms. Allocated memory is still 187.7 MB. Free memory was 170.2 MB in the beginning and 153.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:41,080 INFO L168 Benchmark]: TraceAbstraction took 4099.56 ms. Allocated memory was 187.7 MB in the beginning and 232.8 MB in the end (delta: 45.1 MB). Free memory was 153.4 MB in the beginning and 97.8 MB in the end (delta: 55.6 MB). Peak memory consumption was 101.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:38:41,080 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 169.45 ms. Allocated memory is still 187.7 MB. Free memory was 151.9 MB in the beginning and 142.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.90 ms. Allocated memory is still 187.7 MB. Free memory was 142.0 MB in the beginning and 170.2 MB in the end (delta: -28.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 333.69 ms. Allocated memory is still 187.7 MB. Free memory was 170.2 MB in the beginning and 153.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4099.56 ms. Allocated memory was 187.7 MB in the beginning and 232.8 MB in the end (delta: 45.1 MB). Free memory was 153.4 MB in the beginning and 97.8 MB in the end (delta: 55.6 MB). Peak memory consumption was 101.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=15, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=1, B=1, counter=2, d=2, p=2, q=0, r=1] [L44] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L44] COND FALSE !(counter++<2) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L58] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L59] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4026.4ms, OverallIterations: 10, TraceHistogramMax: 8, EmptinessCheckTime: 12.2ms, AutomataDifference: 1142.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 292 SDtfs, 120 SDslu, 691 SDs, 0 SdLazy, 633 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 577.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 552.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=9, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 87.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 49.8ms SsaConstructionTime, 153.6ms SatisfiabilityAnalysisTime, 943.5ms InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 205 ConstructedInterpolants, 0 QuantifiedInterpolants, 778 SizeOfPredicates, 16 NumberOfNonLiveVariables, 735 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 113/135 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...