/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:18:03,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:18:03,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:18:03,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:18:03,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:18:03,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:18:03,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:18:03,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:18:03,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:18:03,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:18:03,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:18:03,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:18:03,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:18:03,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:18:03,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:18:03,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:18:03,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:18:03,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:18:03,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:18:03,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:18:03,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:18:03,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:18:03,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:18:03,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:18:03,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 17:18:03,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:18:03,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:18:03,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:18:03,805 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 [2020-08-21 17:18:03,841 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:18:03,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:18:03,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:18:03,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:18:03,843 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:18:03,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:18:03,843 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:18:03,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:18:03,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:18:03,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:18:03,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:18:03,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:18:03,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:18:03,846 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:18:03,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:18:03,847 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:18:03,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:18:03,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:18:03,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:18:03,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:18:03,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:18:03,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:18:03,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:18:03,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:18:03,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:18:03,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:18:03,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:18:03,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:18:03,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:18:03,849 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:18:04,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:18:04,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:18:04,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:18:04,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:18:04,179 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:18:04,180 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-08-21 17:18:04,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebe797790/acbaab52221c47c18b5bdcc5b812020d/FLAGb5f4de963 [2020-08-21 17:18:04,765 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:18:04,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann01-2.c [2020-08-21 17:18:04,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebe797790/acbaab52221c47c18b5bdcc5b812020d/FLAGb5f4de963 [2020-08-21 17:18:05,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebe797790/acbaab52221c47c18b5bdcc5b812020d [2020-08-21 17:18:05,213 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:18:05,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:18:05,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:18:05,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:18:05,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:18:05,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bafea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05, skipping insertion in model container [2020-08-21 17:18:05,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:18:05,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:18:05,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:18:05,495 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:18:05,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:18:05,521 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:18:05,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05 WrapperNode [2020-08-21 17:18:05,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:18:05,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:18:05,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:18:05,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:18:05,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (1/1) ... [2020-08-21 17:18:05,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:18:05,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:18:05,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:18:05,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:18:05,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (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 [2020-08-21 17:18:05,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:18:05,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:18:05,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-08-21 17:18:05,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:18:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:18:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:18:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-08-21 17:18:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:18:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:18:05,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:18:05,890 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:18:05,891 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 17:18:05,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:18:05 BoogieIcfgContainer [2020-08-21 17:18:05,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:18:05,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:18:05,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:18:05,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:18:05,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:18:05" (1/3) ... [2020-08-21 17:18:05,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267588c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:18:05, skipping insertion in model container [2020-08-21 17:18:05,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:18:05" (2/3) ... [2020-08-21 17:18:05,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267588c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:18:05, skipping insertion in model container [2020-08-21 17:18:05,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:18:05" (3/3) ... [2020-08-21 17:18:05,902 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2020-08-21 17:18:05,912 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:18:05,919 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:18:05,934 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:18:05,957 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:18:05,957 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:18:05,957 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:18:05,958 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:18:05,958 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:18:05,958 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:18:05,958 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:18:05,958 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:18:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 17:18:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 17:18:05,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:18:05,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:18:05,982 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:18:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:18:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-08-21 17:18:05,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:18:05,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833204482] [2020-08-21 17:18:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:18:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:06,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:18:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:06,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:18:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:18:06,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833204482] [2020-08-21 17:18:06,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:18:06,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:18:06,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827508422] [2020-08-21 17:18:06,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:18:06,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:18:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:18:06,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:18:06,402 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-08-21 17:18:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:18:06,607 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-08-21 17:18:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:18:06,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-21 17:18:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:18:06,623 INFO L225 Difference]: With dead ends: 41 [2020-08-21 17:18:06,623 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 17:18:06,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:18:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 17:18:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 17:18:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 17:18:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-21 17:18:06,684 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2020-08-21 17:18:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:18:06,685 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-21 17:18:06,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:18:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-21 17:18:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:18:06,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:18:06,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:18:06,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:18:06,690 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:18:06,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:18:06,690 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-08-21 17:18:06,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:18:06,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382958784] [2020-08-21 17:18:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:18:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:06,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:18:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:06,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:18:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:06,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 17:18:06,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382958784] [2020-08-21 17:18:06,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:18:06,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 17:18:06,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695773487] [2020-08-21 17:18:06,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 17:18:06,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:18:06,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 17:18:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 17:18:06,892 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2020-08-21 17:18:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:18:07,085 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-08-21 17:18:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:18:07,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-08-21 17:18:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:18:07,088 INFO L225 Difference]: With dead ends: 32 [2020-08-21 17:18:07,088 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 17:18:07,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:18:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 17:18:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 17:18:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 17:18:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-08-21 17:18:07,100 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2020-08-21 17:18:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:18:07,101 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-08-21 17:18:07,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 17:18:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-08-21 17:18:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:18:07,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:18:07,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:18:07,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:18:07,104 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:18:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:18:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2020-08-21 17:18:07,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:18:07,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525057778] [2020-08-21 17:18:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:18:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:18:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:18:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 17:18:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-21 17:18:07,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525057778] [2020-08-21 17:18:07,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:18:07,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 17:18:07,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859914562] [2020-08-21 17:18:07,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:18:07,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:18:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:18:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:18:07,223 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2020-08-21 17:18:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:18:07,289 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2020-08-21 17:18:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:18:07,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 17:18:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:18:07,291 INFO L225 Difference]: With dead ends: 46 [2020-08-21 17:18:07,292 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 17:18:07,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:18:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 17:18:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 17:18:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 17:18:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-08-21 17:18:07,305 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2020-08-21 17:18:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:18:07,306 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-08-21 17:18:07,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:18:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-08-21 17:18:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-21 17:18:07,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:18:07,312 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:18:07,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:18:07,313 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:18:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:18:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-08-21 17:18:07,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:18:07,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180657498] [2020-08-21 17:18:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:18:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:18:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:18:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:18:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-08-21 17:18:07,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180657498] [2020-08-21 17:18:07,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:18:07,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:18:07,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787318239] [2020-08-21 17:18:07,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:18:07,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:18:07,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:18:07,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:18:07,560 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 13 states. [2020-08-21 17:18:08,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:18:08,092 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2020-08-21 17:18:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 17:18:08,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-08-21 17:18:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:18:08,097 INFO L225 Difference]: With dead ends: 54 [2020-08-21 17:18:08,098 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 17:18:08,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2020-08-21 17:18:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 17:18:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2020-08-21 17:18:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 17:18:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2020-08-21 17:18:08,116 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 35 [2020-08-21 17:18:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:18:08,116 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2020-08-21 17:18:08,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:18:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2020-08-21 17:18:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 17:18:08,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:18:08,119 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:18:08,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:18:08,120 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:18:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:18:08,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 2 times [2020-08-21 17:18:08,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:18:08,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530598176] [2020-08-21 17:18:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:18:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:08,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:18:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:08,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:18:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:08,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:08,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:08,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:08,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:18:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-21 17:18:08,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530598176] [2020-08-21 17:18:08,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:18:08,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 17:18:08,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612243620] [2020-08-21 17:18:08,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 17:18:08,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:18:08,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 17:18:08,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:18:08,450 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 14 states. [2020-08-21 17:18:08,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:18:08,982 INFO L93 Difference]: Finished difference Result 65 states and 116 transitions. [2020-08-21 17:18:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 17:18:08,983 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-08-21 17:18:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:18:08,986 INFO L225 Difference]: With dead ends: 65 [2020-08-21 17:18:08,986 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 17:18:08,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2020-08-21 17:18:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 17:18:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2020-08-21 17:18:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 17:18:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2020-08-21 17:18:09,002 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 42 [2020-08-21 17:18:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:18:09,003 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2020-08-21 17:18:09,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 17:18:09,003 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2020-08-21 17:18:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 17:18:09,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:18:09,005 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:18:09,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:18:09,006 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:18:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:18:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1051926487, now seen corresponding path program 3 times [2020-08-21 17:18:09,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:18:09,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557922419] [2020-08-21 17:18:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:18:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:18:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:18:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:18:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 17:18:09,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557922419] [2020-08-21 17:18:09,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:18:09,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:18:09,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770051383] [2020-08-21 17:18:09,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:18:09,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:18:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:18:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:18:09,110 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 7 states. [2020-08-21 17:18:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:18:09,228 INFO L93 Difference]: Finished difference Result 75 states and 128 transitions. [2020-08-21 17:18:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:18:09,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-21 17:18:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:18:09,231 INFO L225 Difference]: With dead ends: 75 [2020-08-21 17:18:09,231 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 17:18:09,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:18:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 17:18:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-21 17:18:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 17:18:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 74 transitions. [2020-08-21 17:18:09,255 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 74 transitions. Word has length 42 [2020-08-21 17:18:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:18:09,265 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 74 transitions. [2020-08-21 17:18:09,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:18:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 74 transitions. [2020-08-21 17:18:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 17:18:09,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:18:09,271 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:18:09,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:18:09,279 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:18:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:18:09,279 INFO L82 PathProgramCache]: Analyzing trace with hash 579008339, now seen corresponding path program 4 times [2020-08-21 17:18:09,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:18:09,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921746705] [2020-08-21 17:18:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:18:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:18:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:18:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:18:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-21 17:18:09,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921746705] [2020-08-21 17:18:09,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:18:09,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 17:18:09,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071483889] [2020-08-21 17:18:09,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:18:09,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:18:09,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:18:09,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:18:09,395 INFO L87 Difference]: Start difference. First operand 49 states and 74 transitions. Second operand 4 states. [2020-08-21 17:18:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:18:09,444 INFO L93 Difference]: Finished difference Result 91 states and 165 transitions. [2020-08-21 17:18:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:18:09,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-08-21 17:18:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:18:09,449 INFO L225 Difference]: With dead ends: 91 [2020-08-21 17:18:09,449 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 17:18:09,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:18:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 17:18:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-08-21 17:18:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 17:18:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2020-08-21 17:18:09,465 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 56 [2020-08-21 17:18:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:18:09,465 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2020-08-21 17:18:09,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:18:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2020-08-21 17:18:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 17:18:09,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:18:09,468 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:18:09,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:18:09,468 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:18:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:18:09,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 5 times [2020-08-21 17:18:09,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:18:09,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255038390] [2020-08-21 17:18:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:18:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:18:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 17:18:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 17:18:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 17:18:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 17:18:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:18:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-08-21 17:18:09,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255038390] [2020-08-21 17:18:09,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:18:09,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 17:18:09,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980171266] [2020-08-21 17:18:09,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 17:18:09,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:18:09,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 17:18:09,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:18:09,683 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand 14 states. [2020-08-21 17:18:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:18:10,229 INFO L93 Difference]: Finished difference Result 95 states and 184 transitions. [2020-08-21 17:18:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 17:18:10,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-08-21 17:18:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:18:10,231 INFO L225 Difference]: With dead ends: 95 [2020-08-21 17:18:10,231 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:18:10,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2020-08-21 17:18:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:18:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:18:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:18:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:18:10,234 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-21 17:18:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:18:10,234 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:18:10,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 17:18:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:18:10,235 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:18:10,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:18:10,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:18:10,572 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2020-08-21 17:18:10,616 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 17:18:10,617 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:18:10,617 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:18:10,617 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:18:10,617 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:18:10,617 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:18:10,617 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2020-08-21 17:18:10,617 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-08-21 17:18:10,617 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2020-08-21 17:18:10,618 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-08-21 17:18:10,618 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (not (= ackermann_~m 0)) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-08-21 17:18:10,618 INFO L264 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse3 (<= 3 |ackermann_#t~ret1|))) (and (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (<= 1 |ackermann_#in~m|)) (.cse2 (= ackermann_~m |ackermann_#in~m|))) (or (and (<= 2 |ackermann_#t~ret1|) (<= ackermann_~m 1) .cse0 .cse1 .cse2) (and .cse3 .cse0 .cse1 .cse2))) (or (= |ackermann_#in~n| 1) .cse3 (and (<= 2 |ackermann_#res|) (<= (+ |ackermann_#in~n| 1) |ackermann_#res|))))) [2020-08-21 17:18:10,618 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-08-21 17:18:10,618 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-08-21 17:18:10,619 INFO L268 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2020-08-21 17:18:10,620 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2020-08-21 17:18:10,620 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-08-21 17:18:10,620 INFO L268 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2020-08-21 17:18:10,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:18:10 BoogieIcfgContainer [2020-08-21 17:18:10,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:18:10,628 INFO L168 Benchmark]: Toolchain (without parser) took 5413.80 ms. Allocated memory was 140.0 MB in the beginning and 289.4 MB in the end (delta: 149.4 MB). Free memory was 103.0 MB in the beginning and 170.1 MB in the end (delta: -67.2 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:18:10,629 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:18:10,630 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.85 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 17:18:10,631 INFO L168 Benchmark]: Boogie Preprocessor took 96.07 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 93.3 MB in the beginning and 180.5 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:18:10,632 INFO L168 Benchmark]: RCFGBuilder took 275.52 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 167.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:18:10,632 INFO L168 Benchmark]: TraceAbstraction took 4730.67 ms. Allocated memory was 201.9 MB in the beginning and 289.4 MB in the end (delta: 87.6 MB). Free memory was 167.1 MB in the beginning and 170.1 MB in the end (delta: -3.0 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:18:10,636 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.85 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.07 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 93.3 MB in the beginning and 180.5 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.52 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 167.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4730.67 ms. Allocated memory was 201.9 MB in the beginning and 289.4 MB in the end (delta: 87.6 MB). Free memory was 167.1 MB in the beginning and 170.1 MB in the end (delta: -3.0 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 175 SDtfs, 137 SDslu, 693 SDs, 0 SdLazy, 1250 SolverSat, 208 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 125 PreInvPairs, 152 NumberOfFragments, 80 HoareAnnotationTreeSize, 125 FomulaSimplifications, 7084 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 222 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 24252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 294/369 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 correct! Received shutdown request...