/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:29:51,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:29:51,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:29:51,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:29:51,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:29:51,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:29:51,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:29:51,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:29:51,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:29:51,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:29:51,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:29:51,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:29:51,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:29:51,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:29:51,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:29:51,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:29:51,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:29:51,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:29:51,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:29:51,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:29:51,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:29:51,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:29:51,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:29:51,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:29:51,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:29:51,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:29:51,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:29:51,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:29:51,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:29:51,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:29:51,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:29:51,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:29:51,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:29:51,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:29:51,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:29:51,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:29:51,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:29:51,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:29:51,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:29:51,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:29:51,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:29:51,737 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 18:29:51,782 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:29:51,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:29:51,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:29:51,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:29:51,785 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:29:51,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:29:51,785 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:29:51,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:29:51,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:29:51,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:29:51,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:29:51,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:29:51,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:29:51,787 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:29:51,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:29:51,787 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:29:51,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:29:51,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:29:51,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:29:51,788 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:29:51,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:29:51,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:51,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:29:51,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:29:51,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:29:51,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:29:51,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:29:51,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:29:51,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:29:51,790 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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;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;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:29:52,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:29:52,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:29:52,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:29:52,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:29:52,299 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:29:52,300 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-09-24 18:29:52,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6d1a71a5/11f8dce4adf146c996338560546c68bb/FLAG39091c817 [2020-09-24 18:29:52,959 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:29:52,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-09-24 18:29:52,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6d1a71a5/11f8dce4adf146c996338560546c68bb/FLAG39091c817 [2020-09-24 18:29:53,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6d1a71a5/11f8dce4adf146c996338560546c68bb [2020-09-24 18:29:53,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:29:53,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:29:53,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:53,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:29:53,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:29:53,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336c4a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53, skipping insertion in model container [2020-09-24 18:29:53,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:29:53,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:29:53,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:53,618 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:29:53,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:53,654 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:29:53,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53 WrapperNode [2020-09-24 18:29:53,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:53,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:29:53,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:29:53,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:29:53,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (1/1) ... [2020-09-24 18:29:53,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:29:53,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:29:53,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:29:53,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:29:53,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (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 18:29:53,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:29:53,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:29:53,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:29:53,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:29:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:29:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:29:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:29:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:29:53,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:29:54,052 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:29:54,052 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:29:54,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:54 BoogieIcfgContainer [2020-09-24 18:29:54,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:29:54,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:29:54,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:29:54,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:29:54,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:29:53" (1/3) ... [2020-09-24 18:29:54,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b77923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:54, skipping insertion in model container [2020-09-24 18:29:54,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:53" (2/3) ... [2020-09-24 18:29:54,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b77923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:54, skipping insertion in model container [2020-09-24 18:29:54,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:54" (3/3) ... [2020-09-24 18:29:54,077 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-09-24 18:29:54,101 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:29:54,129 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:29:54,163 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:29:54,208 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:29:54,209 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:29:54,209 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:29:54,209 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:29:54,209 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:29:54,209 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:29:54,209 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:29:54,210 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:29:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-24 18:29:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 18:29:54,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:54,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:54,242 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-24 18:29:54,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:54,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984909833] [2020-09-24 18:29:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:54,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:29:54,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:54,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-09-24 18:29:54,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:54,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:54,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 18:29:54,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:54,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:29:54,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:54,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:54,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:54,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:54,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:54,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:54,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:54,563 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 18:29:54,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984909833] [2020-09-24 18:29:54,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:54,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 18:29:54,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885444873] [2020-09-24 18:29:54,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 18:29:54,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:54,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 18:29:54,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 18:29:54,590 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-24 18:29:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:54,615 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-24 18:29:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 18:29:54,617 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-24 18:29:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:54,627 INFO L225 Difference]: With dead ends: 33 [2020-09-24 18:29:54,628 INFO L226 Difference]: Without dead ends: 16 [2020-09-24 18:29:54,632 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 18:29:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-24 18:29:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-24 18:29:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-24 18:29:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-24 18:29:54,674 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-24 18:29:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:54,675 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-24 18:29:54,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 18:29:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-24 18:29:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 18:29:54,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:54,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:54,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:29:54,677 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:54,678 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-24 18:29:54,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:54,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502079137] [2020-09-24 18:29:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:54,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 18:29:54,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:54,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-24 18:29:54,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:29:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:54,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 18:29:54,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:54,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:54,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:54,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:54,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:54,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:54,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:54,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:54,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:54,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:54,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:54,874 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 18:29:54,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502079137] [2020-09-24 18:29:54,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:54,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 18:29:54,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267427701] [2020-09-24 18:29:54,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 18:29:54,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:54,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 18:29:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:29:54,879 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-24 18:29:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:54,917 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-24 18:29:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 18:29:54,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-24 18:29:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:54,919 INFO L225 Difference]: With dead ends: 24 [2020-09-24 18:29:54,920 INFO L226 Difference]: Without dead ends: 19 [2020-09-24 18:29:54,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:29:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-24 18:29:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-24 18:29:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-24 18:29:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-24 18:29:54,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-24 18:29:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:54,931 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-24 18:29:54,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 18:29:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-24 18:29:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 18:29:54,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:54,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:54,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:29:54,933 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-24 18:29:54,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:54,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160157155] [2020-09-24 18:29:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:54,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:55,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:29:55,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:55,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-24 18:29:55,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:29:55,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:55,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:29:55,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:55,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:55,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:55,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:55,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:29:55,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:55,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:55,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:55,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:29:55,285 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 18:29:55,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160157155] [2020-09-24 18:29:55,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:55,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:29:55,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562625976] [2020-09-24 18:29:55,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:55,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:55,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:55,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:55,289 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-24 18:29:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:55,359 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-24 18:29:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:29:55,359 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 18:29:55,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:55,361 INFO L225 Difference]: With dead ends: 29 [2020-09-24 18:29:55,361 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 18:29:55,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 18:29:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-09-24 18:29:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 18:29:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 18:29:55,368 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 18:29:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:55,369 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 18:29:55,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 18:29:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 18:29:55,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:55,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:55,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:29:55,371 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-24 18:29:55,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:55,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091964108] [2020-09-24 18:29:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:55,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:55,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 18:29:55,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:55,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-09-24 18:29:55,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:29:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:55,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 18:29:55,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:55,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:55,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:55,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:55,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:55,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:55,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:55,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:55,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:55,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:55,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:55,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091964108] [2020-09-24 18:29:55,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:55,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:29:55,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226296734] [2020-09-24 18:29:55,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:29:55,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:29:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:55,823 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-24 18:29:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:55,933 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-24 18:29:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 18:29:55,933 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-24 18:29:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:55,934 INFO L225 Difference]: With dead ends: 34 [2020-09-24 18:29:55,935 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 18:29:55,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 18:29:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-24 18:29:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 18:29:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 18:29:55,942 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 18:29:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:55,943 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 18:29:55,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:29:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 18:29:55,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 18:29:55,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:55,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:55,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:29:55,945 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:55,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-24 18:29:55,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:55,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693189944] [2020-09-24 18:29:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:55,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:56,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 18:29:56,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:56,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-09-24 18:29:56,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:29:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:56,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 18:29:56,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:56,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:56,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:56,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:56,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:56,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:56,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:56,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:56,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:56,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693189944] [2020-09-24 18:29:56,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:56,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:29:56,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798063544] [2020-09-24 18:29:56,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:29:56,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:56,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:29:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:29:56,409 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-09-24 18:29:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:56,585 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-24 18:29:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:29:56,586 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-24 18:29:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:56,587 INFO L225 Difference]: With dead ends: 39 [2020-09-24 18:29:56,587 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 18:29:56,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:29:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 18:29:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-24 18:29:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 18:29:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 18:29:56,595 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 18:29:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:56,595 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 18:29:56,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:29:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 18:29:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 18:29:56,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:56,596 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:56,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:29:56,597 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-24 18:29:56,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:56,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729386737] [2020-09-24 18:29:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:56,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:56,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 18:29:57,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:57,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-09-24 18:29:57,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:29:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 18:29:57,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:57,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:57,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:57,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:57,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:57,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:57,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:57,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:57,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729386737] [2020-09-24 18:29:57,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:57,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:29:57,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554833630] [2020-09-24 18:29:57,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:29:57,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:57,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:29:57,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:57,193 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-09-24 18:29:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:57,444 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-09-24 18:29:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 18:29:57,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-09-24 18:29:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:57,451 INFO L225 Difference]: With dead ends: 44 [2020-09-24 18:29:57,451 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 18:29:57,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-24 18:29:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 18:29:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-24 18:29:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 18:29:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 18:29:57,460 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-24 18:29:57,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:57,461 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 18:29:57,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:29:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 18:29:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 18:29:57,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:57,466 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:57,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:29:57,467 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-24 18:29:57,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:57,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260203719] [2020-09-24 18:29:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:57,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:57,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:57,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 18:29:57,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:57,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-09-24 18:29:57,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:57,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 18:29:57,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:29:57,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 18:29:57,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:29:58,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:58,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:58,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:58,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:58,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:58,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:29:58,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:58,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:58,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260203719] [2020-09-24 18:29:58,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:58,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 18:29:58,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011765657] [2020-09-24 18:29:58,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 18:29:58,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:58,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 18:29:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 18:29:58,236 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-09-24 18:29:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:58,570 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-09-24 18:29:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 18:29:58,571 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-24 18:29:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:58,572 INFO L225 Difference]: With dead ends: 49 [2020-09-24 18:29:58,572 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 18:29:58,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-24 18:29:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 18:29:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 18:29:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 18:29:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 18:29:58,579 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-24 18:29:58,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:58,580 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 18:29:58,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 18:29:58,580 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 18:29:58,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 18:29:58,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:58,581 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:58,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:29:58,582 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-24 18:29:58,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:58,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109524091] [2020-09-24 18:29:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:29:58,596 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:29:58,596 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:29:58,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:29:58,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:29:58 BoogieIcfgContainer [2020-09-24 18:29:58,619 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:29:58,622 INFO L168 Benchmark]: Toolchain (without parser) took 5282.00 ms. Allocated memory was 140.0 MB in the beginning and 245.9 MB in the end (delta: 105.9 MB). Free memory was 102.1 MB in the beginning and 159.8 MB in the end (delta: -57.7 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:58,623 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 18:29:58,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.82 ms. Allocated memory is still 140.0 MB. Free memory was 101.5 MB in the beginning and 92.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:58,625 INFO L168 Benchmark]: Boogie Preprocessor took 116.95 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 181.5 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:58,625 INFO L168 Benchmark]: RCFGBuilder took 287.59 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:58,626 INFO L168 Benchmark]: TraceAbstraction took 4556.82 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 169.5 MB in the beginning and 159.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:58,630 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.82 ms. Allocated memory is still 140.0 MB. Free memory was 101.5 MB in the beginning and 92.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.95 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 181.5 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 287.59 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4556.82 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 169.5 MB in the beginning and 159.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 53.3 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: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L19] CALL __VERIFIER_assert(x != 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 53 SDslu, 425 SDs, 0 SdLazy, 409 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 18485 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...