/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/ps4-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:44:23,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:23,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:23,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:44:23,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:44:23,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:44:23,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:44:23,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:44:23,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:44:23,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:44:23,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:44:23,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:44:23,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:44:23,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:44:23,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:44:23,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:44:23,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:44:23,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:23,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:23,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:23,642 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 [2021-05-06 04:44:23,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:23,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:23,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:23,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:23,672 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:23,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:23,672 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:23,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:23,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:23,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:23,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:23,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:23,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:23,673 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:23,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:23,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:23,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:23,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:23,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:23,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:23,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:23,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:23,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:23,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:23,987 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:23,987 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:23,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c [2021-05-06 04:44:24,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b97bb86/4b6b3f2bb8164278ae71adc2e02460a9/FLAGf6088644d [2021-05-06 04:44:24,386 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:24,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c [2021-05-06 04:44:24,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b97bb86/4b6b3f2bb8164278ae71adc2e02460a9/FLAGf6088644d [2021-05-06 04:44:24,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b97bb86/4b6b3f2bb8164278ae71adc2e02460a9 [2021-05-06 04:44:24,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:24,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:24,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:24,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:24,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:24,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:24" (1/1) ... [2021-05-06 04:44:24,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c881de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:24, skipping insertion in model container [2021-05-06 04:44:24,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:24" (1/1) ... [2021-05-06 04:44:24,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:24,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:24,964 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/ps4-ll_unwindbound2.c[458,471] [2021-05-06 04:44:24,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:24,983 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:24,991 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/ps4-ll_unwindbound2.c[458,471] [2021-05-06 04:44:25,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:25,019 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:25,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25 WrapperNode [2021-05-06 04:44:25,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:25,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:25,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:25,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:25,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:25,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:25,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:25,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:25,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (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 [2021-05-06 04:44:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:25,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:25,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:25,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:25,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:25,351 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:25,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:25 BoogieIcfgContainer [2021-05-06 04:44:25,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:25,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:25,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:25,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:25,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:24" (1/3) ... [2021-05-06 04:44:25,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38034aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:25, skipping insertion in model container [2021-05-06 04:44:25,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (2/3) ... [2021-05-06 04:44:25,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38034aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:25, skipping insertion in model container [2021-05-06 04:44:25,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:25" (3/3) ... [2021-05-06 04:44:25,356 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound2.c [2021-05-06 04:44:25,360 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:25,378 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:25,394 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:25,422 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:25,422 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:25,422 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:25,422 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:25,422 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:25,422 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:25,422 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:25,422 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 04:44:25,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:25,435 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:25,435 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-06 04:44:25,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:25,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395038301] [2021-05-06 04:44:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:25,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:25,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395038301] [2021-05-06 04:44:25,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395038301] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:25,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:25,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:25,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314681180] [2021-05-06 04:44:25,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:25,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:25,659 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-06 04:44:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:25,731 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-06 04:44:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:25,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-06 04:44:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:25,738 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:25,738 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 04:44:25,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 04:44:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 04:44:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-06 04:44:25,761 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-06 04:44:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:25,762 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-06 04:44:25,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-06 04:44:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-06 04:44:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:25,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:25,763 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:25,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:25,763 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-06 04:44:25,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:25,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786799215] [2021-05-06 04:44:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:25,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:25,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733586816] [2021-05-06 04:44:25,773 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 [2021-05-06 04:44:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:44:25,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:25,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:25,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:25,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786799215] [2021-05-06 04:44:25,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:25,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733586816] [2021-05-06 04:44:25,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733586816] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:25,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:25,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:44:25,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070593260] [2021-05-06 04:44:25,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:44:25,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:44:25,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:25,956 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-05-06 04:44:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:25,965 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-06 04:44:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:44:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-06 04:44:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:25,966 INFO L225 Difference]: With dead ends: 28 [2021-05-06 04:44:25,966 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 04:44:25,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 04:44:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 04:44:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 04:44:25,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 04:44:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:25,971 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 04:44:25,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-05-06 04:44:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 04:44:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:25,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:25,972 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:26,173 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-06 04:44:26,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445238681] [2021-05-06 04:44:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705514075] [2021-05-06 04:44:26,181 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 [2021-05-06 04:44:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:26,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:26,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445238681] [2021-05-06 04:44:26,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:26,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705514075] [2021-05-06 04:44:26,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705514075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:26,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:26,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:26,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888407508] [2021-05-06 04:44:26,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:26,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:26,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:26,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:26,289 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,320 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-06 04:44:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 [2021-05-06 04:44:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,321 INFO L225 Difference]: With dead ends: 30 [2021-05-06 04:44:26,321 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:44:26,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:44:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 04:44:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 04:44:26,327 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-06 04:44:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,327 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 04:44:26,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 04:44:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:26,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,328 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:26,546 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,546 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-06 04:44:26,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167364683] [2021-05-06 04:44:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180788745] [2021-05-06 04:44:26,559 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 [2021-05-06 04:44:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:26,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:26,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167364683] [2021-05-06 04:44:26,683 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:26,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180788745] [2021-05-06 04:44:26,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180788745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:26,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:26,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:44:26,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947348083] [2021-05-06 04:44:26,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:26,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:26,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:26,684 INFO L87 Difference]: Start difference. First operand 26 states and 29 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, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,707 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-06 04:44:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:26,707 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, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 04:44:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,708 INFO L225 Difference]: With dead ends: 36 [2021-05-06 04:44:26,708 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 04:44:26,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 04:44:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 04:44:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 04:44:26,712 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-06 04:44:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,712 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 04:44:26,713 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, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 04:44:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:26,713 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,713 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:26,930 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-06 04:44:26,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626412956] [2021-05-06 04:44:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716024296] [2021-05-06 04:44:26,938 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 [2021-05-06 04:44:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:27,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:27,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:27,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:27,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:27,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626412956] [2021-05-06 04:44:27,082 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:27,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716024296] [2021-05-06 04:44:27,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716024296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:27,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:27,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:27,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953885730] [2021-05-06 04:44:27,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:27,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:27,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:27,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:27,083 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:27,116 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-06 04:44:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 20 [2021-05-06 04:44:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:27,117 INFO L225 Difference]: With dead ends: 38 [2021-05-06 04:44:27,117 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:44:27,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:44:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 04:44:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 04:44:27,122 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-06 04:44:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:27,122 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 04:44:27,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 04:44:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 04:44:27,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:27,123 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:27,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,339 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:27,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-06 04:44:27,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:27,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728148656] [2021-05-06 04:44:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:27,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:27,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921747155] [2021-05-06 04:44:27,347 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 [2021-05-06 04:44:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:27,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:44:27,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:27,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,167 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 9 [2021-05-06 04:44:28,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:44:28,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:28,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728148656] [2021-05-06 04:44:28,212 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:28,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921747155] [2021-05-06 04:44:28,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921747155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:28,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:28,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:28,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756610242] [2021-05-06 04:44:28,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:28,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:28,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:28,213 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:28,293 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 04:44:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:28,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 04:44:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:28,294 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:28,294 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:44:28,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:44:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 04:44:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 04:44:28,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 04:44:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:28,299 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 04:44:28,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 04:44:28,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:28,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:28,299 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:28,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:44:28,516 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-06 04:44:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:28,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864107161] [2021-05-06 04:44:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:28,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:28,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641005130] [2021-05-06 04:44:28,523 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 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 [2021-05-06 04:44:28,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 04:44:28,596 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:44:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:44:28,611 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:44:28,635 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 04:44:28,635 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 04:44:28,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:28,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:44:28 BoogieIcfgContainer [2021-05-06 04:44:28,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:44:28,886 INFO L168 Benchmark]: Toolchain (without parser) took 4072.82 ms. Allocated memory was 186.6 MB in the beginning and 224.4 MB in the end (delta: 37.7 MB). Free memory was 150.6 MB in the beginning and 190.8 MB in the end (delta: -40.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:44:28,886 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory was 167.1 MB in the beginning and 167.0 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:44:28,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.42 ms. Allocated memory is still 186.6 MB. Free memory was 150.4 MB in the beginning and 170.5 MB in the end (delta: -20.1 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:28,886 INFO L168 Benchmark]: Boogie Preprocessor took 34.55 ms. Allocated memory is still 186.6 MB. Free memory was 170.5 MB in the beginning and 169.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:28,886 INFO L168 Benchmark]: RCFGBuilder took 295.62 ms. Allocated memory is still 186.6 MB. Free memory was 169.5 MB in the beginning and 154.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:28,886 INFO L168 Benchmark]: TraceAbstraction took 3532.58 ms. Allocated memory was 186.6 MB in the beginning and 224.4 MB in the end (delta: 37.7 MB). Free memory was 153.7 MB in the beginning and 190.8 MB in the end (delta: -37.1 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:28,887 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 186.6 MB. Free memory was 167.1 MB in the beginning and 167.0 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 204.42 ms. Allocated memory is still 186.6 MB. Free memory was 150.4 MB in the beginning and 170.5 MB in the end (delta: -20.1 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.55 ms. Allocated memory is still 186.6 MB. Free memory was 170.5 MB in the beginning and 169.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 295.62 ms. Allocated memory is still 186.6 MB. Free memory was 169.5 MB in the beginning and 154.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3532.58 ms. Allocated memory was 186.6 MB in the beginning and 224.4 MB in the end (delta: 37.7 MB). Free memory was 153.7 MB in the beginning and 190.8 MB in the end (delta: -37.1 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=5, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=3, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=3, x=0, y=0] [L27] COND TRUE counter++<2 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=3, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=3, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=3, x=1, y=1] [L27] COND TRUE counter++<2 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=3, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=3, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=3, x=9, y=2] [L27] COND FALSE !(counter++<2) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3428.7ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 7.0ms, AutomataDifference: 279.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 123 SDtfs, 34 SDslu, 301 SDs, 0 SdLazy, 162 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 126.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 855.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=5, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 34.0ms AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 57.8ms SsaConstructionTime, 133.5ms SatisfiabilityAnalysisTime, 1252.1ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 356 SizeOfPredicates, 9 NumberOfNonLiveVariables, 598 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 11/21 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...