/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:20:29,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:20:29,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:20:29,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:20:29,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:20:29,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:20:29,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:20:29,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:20:29,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:20:29,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:20:29,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:20:29,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:20:29,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:20:29,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:20:29,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:20:29,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:20:29,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:20:29,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:20:29,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:20:29,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:20:29,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:20:29,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:20:29,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:20:29,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:20:29,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:20:29,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:20:29,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:20:29,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:20:29,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:20:29,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 17:20:29,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:20:29,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:20:29,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:20:29,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 17:20:29,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:20:29,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:20:29,645 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:20:29,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:20:29,645 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:20:29,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:20:29,646 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:20:29,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:20:29,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:20:29,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:20:29,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:20:29,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:20:29,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:20:29,647 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:20:29,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:20:29,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:20:29,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:20:29,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:20:29,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:20:29,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:20:29,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:20:29,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:20:29,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:20:29,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:20:29,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:20:29,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:20:29,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:20:29,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:20:29,651 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:20:29,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:20:30,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:20:30,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:20:30,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:20:30,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:20:30,150 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:20:30,152 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-24 17:20:30,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d64835dea/d50952fc216b4767a8564c456df84e5e/FLAGcffb269ff [2020-09-24 17:20:30,736 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:20:30,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-24 17:20:30,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d64835dea/d50952fc216b4767a8564c456df84e5e/FLAGcffb269ff [2020-09-24 17:20:31,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d64835dea/d50952fc216b4767a8564c456df84e5e [2020-09-24 17:20:31,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:20:31,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:20:31,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:31,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:20:31,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:20:31,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2baf6fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31, skipping insertion in model container [2020-09-24 17:20:31,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:20:31,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:20:31,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:31,374 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:20:31,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:20:31,404 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:20:31,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31 WrapperNode [2020-09-24 17:20:31,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:20:31,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:20:31,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:20:31,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:20:31,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (1/1) ... [2020-09-24 17:20:31,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:20:31,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:20:31,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:20:31,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:20:31,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:20:31,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:20:31,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:20:31,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:20:31,604 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:20:31,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:20:31,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:20:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 17:20:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:20:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:20:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:20:31,835 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:20:31,835 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 17:20:31,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:31 BoogieIcfgContainer [2020-09-24 17:20:31,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:20:31,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:20:31,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:20:31,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:20:31,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:20:31" (1/3) ... [2020-09-24 17:20:31,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c82063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:31, skipping insertion in model container [2020-09-24 17:20:31,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:20:31" (2/3) ... [2020-09-24 17:20:31,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c82063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:20:31, skipping insertion in model container [2020-09-24 17:20:31,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:20:31" (3/3) ... [2020-09-24 17:20:31,873 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-24 17:20:31,899 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:20:31,922 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:20:31,950 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:20:31,981 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:20:31,981 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:20:31,981 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:20:31,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:20:31,982 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:20:31,982 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:20:31,982 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:20:31,983 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:20:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-24 17:20:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 17:20:32,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:32,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:32,015 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:32,023 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-09-24 17:20:32,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:32,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906610921] [2020-09-24 17:20:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,328 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 17:20:32,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:20:32,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-09-24 17:20:32,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:32,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 17:20:32,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:32,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:20:32,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,406 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:32,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:32,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 17:20:32,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:32,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:32,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:32,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:20:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:32,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906610921] [2020-09-24 17:20:32,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:32,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 17:20:32,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100693433] [2020-09-24 17:20:32,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 17:20:32,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 17:20:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 17:20:32,442 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-09-24 17:20:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:32,465 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-24 17:20:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 17:20:32,467 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-24 17:20:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:32,475 INFO L225 Difference]: With dead ends: 41 [2020-09-24 17:20:32,475 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 17:20:32,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 17:20:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 17:20:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-24 17:20:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 17:20:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-24 17:20:32,523 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-24 17:20:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:32,524 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-24 17:20:32,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 17:20:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-24 17:20:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 17:20:32,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:32,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:32,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:20:32,526 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:32,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:32,526 INFO L82 PathProgramCache]: Analyzing trace with hash 62535021, now seen corresponding path program 1 times [2020-09-24 17:20:32,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:32,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603807258] [2020-09-24 17:20:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,666 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 17:20:32,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:32,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-09-24 17:20:32,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:20:32,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:20:32,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:32,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:32,795 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:32,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:32,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:32,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:20:32,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:32,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:32,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:32,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:32,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603807258] [2020-09-24 17:20:32,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:20:32,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:20:32,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617301831] [2020-09-24 17:20:32,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:20:32,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:20:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:20:32,811 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-09-24 17:20:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:32,858 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-24 17:20:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:20:32,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-24 17:20:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:32,861 INFO L225 Difference]: With dead ends: 38 [2020-09-24 17:20:32,861 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 17:20:32,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:20:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 17:20:32,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-24 17:20:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 17:20:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-24 17:20:32,870 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-09-24 17:20:32,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:32,871 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-24 17:20:32,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:20:32,871 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-24 17:20:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 17:20:32,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:32,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:32,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:20:32,873 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-09-24 17:20:32,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:32,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333061614] [2020-09-24 17:20:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:32,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,190 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:20:33,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-09-24 17:20:33,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:20:33,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:33,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 17:20:33,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:33,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,516 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:33,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:33,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:33,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:33,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333061614] [2020-09-24 17:20:33,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:33,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:20:33,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539558045] [2020-09-24 17:20:33,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:20:33,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:20:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:20:33,526 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-24 17:20:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:33,756 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-24 17:20:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 17:20:33,757 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-24 17:20:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:33,760 INFO L225 Difference]: With dead ends: 60 [2020-09-24 17:20:33,760 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 17:20:33,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:20:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 17:20:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-24 17:20:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 17:20:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-24 17:20:33,771 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-24 17:20:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:33,771 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-24 17:20:33,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:20:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-24 17:20:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 17:20:33,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:33,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:33,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:20:33,773 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-09-24 17:20:33,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:33,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231579508] [2020-09-24 17:20:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,930 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 17:20:33,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 17:20:33,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:20:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:20:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 17:20:33,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:33,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:33,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:33,994 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:33,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:33,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:33,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:33,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:33,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231579508] [2020-09-24 17:20:33,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:34,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 17:20:34,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030634258] [2020-09-24 17:20:34,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 17:20:34,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:34,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 17:20:34,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:20:34,002 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-09-24 17:20:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:34,119 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-09-24 17:20:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 17:20:34,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-24 17:20:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:34,121 INFO L225 Difference]: With dead ends: 60 [2020-09-24 17:20:34,121 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 17:20:34,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:20:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 17:20:34,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-24 17:20:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-24 17:20:34,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-24 17:20:34,129 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-24 17:20:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:34,129 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-24 17:20:34,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 17:20:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-24 17:20:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:20:34,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:34,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:34,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:20:34,131 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1260601325, now seen corresponding path program 2 times [2020-09-24 17:20:34,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:34,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199189262] [2020-09-24 17:20:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,465 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 17:20:34,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-09-24 17:20:34,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 17:20:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 17:20:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 17:20:34,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:34,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:34,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:34,772 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:34,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:34,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:34,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:34,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:20:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 17:20:34,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199189262] [2020-09-24 17:20:34,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:34,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 17:20:34,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453372751] [2020-09-24 17:20:34,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 17:20:34,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 17:20:34,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:20:34,782 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-24 17:20:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:35,130 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-24 17:20:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 17:20:35,130 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-24 17:20:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:35,131 INFO L225 Difference]: With dead ends: 54 [2020-09-24 17:20:35,132 INFO L226 Difference]: Without dead ends: 49 [2020-09-24 17:20:35,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 17:20:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-24 17:20:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-09-24 17:20:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 17:20:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-24 17:20:35,139 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-09-24 17:20:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:35,140 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-24 17:20:35,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 17:20:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-24 17:20:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 17:20:35,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:35,141 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:35,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:20:35,142 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:35,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1220208573, now seen corresponding path program 2 times [2020-09-24 17:20:35,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:35,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874110582] [2020-09-24 17:20:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,369 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 17:20:35,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-09-24 17:20:35,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 17:20:35,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:20:35,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 17:20:35,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:35,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:35,481 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:35,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:35,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:20:35,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:35,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874110582] [2020-09-24 17:20:35,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:35,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:20:35,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182430021] [2020-09-24 17:20:35,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:20:35,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:20:35,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:20:35,490 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-09-24 17:20:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:35,675 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-09-24 17:20:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 17:20:35,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-24 17:20:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:35,677 INFO L225 Difference]: With dead ends: 70 [2020-09-24 17:20:35,677 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 17:20:35,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:20:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 17:20:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-09-24 17:20:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-24 17:20:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-24 17:20:35,684 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 41 [2020-09-24 17:20:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:35,685 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-24 17:20:35,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:20:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-24 17:20:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 17:20:35,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:35,687 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:35,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:20:35,687 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash 765701111, now seen corresponding path program 3 times [2020-09-24 17:20:35,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:35,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958174589] [2020-09-24 17:20:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:35,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,050 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 17:20:36,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:36,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-09-24 17:20:36,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 17:20:36,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:20:36,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 17:20:36,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:36,232 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:36,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:36,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:36,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:20:36,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:36,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:36,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:36,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958174589] [2020-09-24 17:20:36,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:36,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 17:20:36,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890830179] [2020-09-24 17:20:36,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 17:20:36,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:36,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 17:20:36,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-24 17:20:36,242 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2020-09-24 17:20:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:36,523 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-09-24 17:20:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 17:20:36,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-24 17:20:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:36,525 INFO L225 Difference]: With dead ends: 79 [2020-09-24 17:20:36,525 INFO L226 Difference]: Without dead ends: 65 [2020-09-24 17:20:36,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-09-24 17:20:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-24 17:20:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-24 17:20:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 17:20:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-24 17:20:36,538 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2020-09-24 17:20:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:36,538 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-24 17:20:36,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 17:20:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-24 17:20:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 17:20:36,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:36,540 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:36,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:20:36,540 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash -258080061, now seen corresponding path program 4 times [2020-09-24 17:20:36,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:36,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888944138] [2020-09-24 17:20:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:36,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:37,204 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:37,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 17:20:37,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:37,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-09-24 17:20:37,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:37,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 17:20:37,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:20:37,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 17:20:37,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:37,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:20:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:20:37,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:20:37,455 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:20:37,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:20:37,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:20:37,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:20:37,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:20:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:20:37,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:20:37,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:20:37,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:20:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:20:37,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888944138] [2020-09-24 17:20:37,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:20:37,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 17:20:37,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210861063] [2020-09-24 17:20:37,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 17:20:37,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:20:37,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 17:20:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:20:37,469 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-09-24 17:20:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:20:37,865 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-24 17:20:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 17:20:37,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-09-24 17:20:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:20:37,869 INFO L225 Difference]: With dead ends: 87 [2020-09-24 17:20:37,869 INFO L226 Difference]: Without dead ends: 73 [2020-09-24 17:20:37,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 17:20:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-24 17:20:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-09-24 17:20:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 17:20:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-24 17:20:37,883 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-09-24 17:20:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:20:37,888 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-24 17:20:37,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 17:20:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-24 17:20:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 17:20:37,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:20:37,890 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:20:37,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 17:20:37,890 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:20:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:20:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1030394231, now seen corresponding path program 5 times [2020-09-24 17:20:37,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:20:37,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863823929] [2020-09-24 17:20:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:20:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 17:20:37,916 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 17:20:37,917 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 17:20:37,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 17:20:37,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 05:20:37 BoogieIcfgContainer [2020-09-24 17:20:37,946 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 17:20:37,954 INFO L168 Benchmark]: Toolchain (without parser) took 6832.19 ms. Allocated memory was 148.4 MB in the beginning and 276.8 MB in the end (delta: 128.5 MB). Free memory was 104.7 MB in the beginning and 198.9 MB in the end (delta: -94.1 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:37,955 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 17:20:37,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.74 ms. Allocated memory is still 148.4 MB. Free memory was 104.1 MB in the beginning and 94.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:37,957 INFO L168 Benchmark]: Boogie Preprocessor took 123.10 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 94.5 MB in the beginning and 183.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:37,958 INFO L168 Benchmark]: RCFGBuilder took 312.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 169.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:37,961 INFO L168 Benchmark]: TraceAbstraction took 6094.04 ms. Allocated memory was 203.9 MB in the beginning and 276.8 MB in the end (delta: 72.9 MB). Free memory was 169.2 MB in the beginning and 198.9 MB in the end (delta: -29.6 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. [2020-09-24 17:20:37,972 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.74 ms. Allocated memory is still 148.4 MB. Free memory was 104.1 MB in the beginning and 94.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.10 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 94.5 MB in the beginning and 183.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 169.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6094.04 ms. Allocated memory was 203.9 MB in the beginning and 276.8 MB in the end (delta: 72.9 MB). Free memory was 169.2 MB in the beginning and 198.9 MB in the end (delta: -29.6 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i