/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:16:04,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:16:04,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:16:04,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:16:04,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:16:04,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:16:04,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:16:04,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:16:04,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:16:04,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:16:04,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:16:04,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:16:04,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:16:04,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:16:04,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:16:04,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:16:04,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:16:04,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:16:04,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:16:04,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:16:04,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:16:04,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:16:04,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:16:04,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:16:04,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:16:04,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:16:04,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:16:04,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:16:04,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:16:04,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:16:04,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:16:04,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:16:04,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:16:04,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:16:04,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:16:04,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:16:04,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:16:04,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:16:04,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:16:04,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:16:04,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:16:04,958 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 [2020-10-12 10:16:04,980 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:16:04,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:16:04,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:16:04,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:16:04,982 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:16:04,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:16:04,983 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:16:04,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:16:04,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:16:04,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:16:04,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:16:04,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:16:04,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:16:04,984 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:16:04,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:16:04,984 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:16:04,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:16:04,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:16:04,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:16:04,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:16:04,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:16:04,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:16:04,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:16:04,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:16:04,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:16:04,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:16:04,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:16:04,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:16:04,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:16:04,987 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:16:05,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:16:05,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:16:05,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:16:05,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:16:05,289 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:16:05,290 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2020-10-12 10:16:05,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c92a0de70/e3801b40a16543d2818d34690c42d450/FLAG9b6916631 [2020-10-12 10:16:05,741 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:16:05,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2020-10-12 10:16:05,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c92a0de70/e3801b40a16543d2818d34690c42d450/FLAG9b6916631 [2020-10-12 10:16:06,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c92a0de70/e3801b40a16543d2818d34690c42d450 [2020-10-12 10:16:06,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:16:06,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:16:06,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:16:06,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:16:06,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:16:06,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92c0d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06, skipping insertion in model container [2020-10-12 10:16:06,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:16:06,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:16:06,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:16:06,356 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:16:06,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:16:06,400 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:16:06,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06 WrapperNode [2020-10-12 10:16:06,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:16:06,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:16:06,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:16:06,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:16:06,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (1/1) ... [2020-10-12 10:16:06,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:16:06,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:16:06,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:16:06,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:16:06,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (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 [2020-10-12 10:16:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:16:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:16:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:16:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:16:06,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:16:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:16:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:16:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:16:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:16:06,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:16:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:16:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:16:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:16:06,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:16:06,940 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:16:06,941 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:16:06,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:16:06 BoogieIcfgContainer [2020-10-12 10:16:06,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:16:06,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:16:06,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:16:06,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:16:06,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:16:06" (1/3) ... [2020-10-12 10:16:06,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb1c615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:16:06, skipping insertion in model container [2020-10-12 10:16:06,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:16:06" (2/3) ... [2020-10-12 10:16:06,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eb1c615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:16:06, skipping insertion in model container [2020-10-12 10:16:06,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:16:06" (3/3) ... [2020-10-12 10:16:06,953 INFO L109 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2020-10-12 10:16:06,964 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:16:06,977 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:16:07,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:16:07,088 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:16:07,089 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:16:07,089 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:16:07,089 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:16:07,089 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:16:07,089 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:16:07,089 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:16:07,090 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:16:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-12 10:16:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 10:16:07,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:07,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:07,136 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:07,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:07,143 INFO L82 PathProgramCache]: Analyzing trace with hash 547567586, now seen corresponding path program 1 times [2020-10-12 10:16:07,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:07,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842466003] [2020-10-12 10:16:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 10:16:07,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-12 10:16:07,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:16:07,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:16:07,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:07,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:16:07,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:07,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842466003] [2020-10-12 10:16:07,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:16:07,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 10:16:07,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672468454] [2020-10-12 10:16:07,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 10:16:07,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 10:16:07,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:16:07,535 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-12 10:16:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:07,615 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-10-12 10:16:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 10:16:07,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-12 10:16:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:07,629 INFO L225 Difference]: With dead ends: 43 [2020-10-12 10:16:07,629 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 10:16:07,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 10:16:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 10:16:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 10:16:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 10:16:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-12 10:16:07,675 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-10-12 10:16:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:07,675 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-12 10:16:07,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 10:16:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-12 10:16:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 10:16:07,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:07,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:07,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:16:07,678 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:07,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1443476915, now seen corresponding path program 1 times [2020-10-12 10:16:07,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:07,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992391549] [2020-10-12 10:16:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 10:16:07,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-12 10:16:07,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:07,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:07,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:16:07,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:07,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:07,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:16:07,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:07,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992391549] [2020-10-12 10:16:07,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:16:07,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:16:07,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113313781] [2020-10-12 10:16:07,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:16:07,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:16:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:16:07,864 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-10-12 10:16:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:07,941 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-12 10:16:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:16:07,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-12 10:16:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:07,945 INFO L225 Difference]: With dead ends: 41 [2020-10-12 10:16:07,945 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 10:16:07,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:16:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 10:16:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-12 10:16:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 10:16:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-12 10:16:07,957 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-12 10:16:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:07,957 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-12 10:16:07,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:16:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-12 10:16:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 10:16:07,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:07,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:07,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:16:07,959 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:07,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1901506806, now seen corresponding path program 1 times [2020-10-12 10:16:07,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:07,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80981687] [2020-10-12 10:16:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:08,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 10:16:08,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:08,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-12 10:16:08,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:08,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:16:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:16:08,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 10:16:08,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:08,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:08,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:08,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:16:08,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:08,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80981687] [2020-10-12 10:16:08,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:08,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:16:08,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644815320] [2020-10-12 10:16:08,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:16:08,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:16:08,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:16:08,548 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 9 states. [2020-10-12 10:16:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:08,860 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-12 10:16:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:16:08,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 10:16:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:08,863 INFO L225 Difference]: With dead ends: 49 [2020-10-12 10:16:08,864 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:16:08,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:16:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:16:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2020-10-12 10:16:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 10:16:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-12 10:16:08,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 17 [2020-10-12 10:16:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:08,883 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-12 10:16:08,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:16:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-12 10:16:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 10:16:08,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:08,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:08,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:16:08,886 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:08,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2000433480, now seen corresponding path program 1 times [2020-10-12 10:16:08,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:08,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451664363] [2020-10-12 10:16:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:08,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:08,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 10:16:09,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:09,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-12 10:16:09,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:16:09,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:09,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:16:09,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:09,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:09,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:09,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:09,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:09,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:09,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:09,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451664363] [2020-10-12 10:16:09,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:09,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:16:09,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262237121] [2020-10-12 10:16:09,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:16:09,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:16:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:16:09,249 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2020-10-12 10:16:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:09,476 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-10-12 10:16:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:16:09,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-12 10:16:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:09,479 INFO L225 Difference]: With dead ends: 60 [2020-10-12 10:16:09,479 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 10:16:09,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:16:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 10:16:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-12 10:16:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:16:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-12 10:16:09,489 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 17 [2020-10-12 10:16:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:09,489 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-12 10:16:09,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:16:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-12 10:16:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 10:16:09,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:09,491 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:09,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:16:09,491 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:09,491 INFO L82 PathProgramCache]: Analyzing trace with hash -689970076, now seen corresponding path program 1 times [2020-10-12 10:16:09,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:09,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863902137] [2020-10-12 10:16:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 10:16:09,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:09,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 10:16:09,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:16:09,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:09,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:16:09,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:09,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:09,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:09,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:09,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:09,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:09,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:09,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:09,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:09,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:09,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863902137] [2020-10-12 10:16:09,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:09,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:16:09,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680654240] [2020-10-12 10:16:09,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:16:09,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:16:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:16:09,859 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 8 states. [2020-10-12 10:16:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:10,058 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-12 10:16:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:16:10,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 10:16:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:10,060 INFO L225 Difference]: With dead ends: 56 [2020-10-12 10:16:10,060 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 10:16:10,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:16:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 10:16:10,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2020-10-12 10:16:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:16:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-12 10:16:10,068 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 20 [2020-10-12 10:16:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:10,069 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-12 10:16:10,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:16:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-12 10:16:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 10:16:10,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:10,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:10,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:16:10,070 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1958890195, now seen corresponding path program 2 times [2020-10-12 10:16:10,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:10,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593351259] [2020-10-12 10:16:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:10,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:10,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 10:16:10,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:16:10,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-12 10:16:10,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:10,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:16:10,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:10,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:16:10,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:10,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:10,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:10,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:10,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:10,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:10,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:10,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:10,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:10,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:10,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:10,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593351259] [2020-10-12 10:16:10,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:10,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:16:10,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380962322] [2020-10-12 10:16:10,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:16:10,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:16:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:16:10,516 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 11 states. [2020-10-12 10:16:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:10,781 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-10-12 10:16:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:16:10,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-12 10:16:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:10,783 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:16:10,783 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 10:16:10,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:16:10,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 10:16:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2020-10-12 10:16:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 10:16:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-12 10:16:10,792 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 20 [2020-10-12 10:16:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:10,792 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-12 10:16:10,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:16:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-12 10:16:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 10:16:10,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:10,794 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:10,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:16:10,794 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1276776090, now seen corresponding path program 1 times [2020-10-12 10:16:10,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:10,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587540713] [2020-10-12 10:16:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:10,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:10,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 10:16:10,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:10,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 10:16:10,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:10,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:16:10,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:10,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 10:16:10,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:10,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:10,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:10,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:10,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:10,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:10,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:10,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:10,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:10,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:10,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:10,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587540713] [2020-10-12 10:16:10,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:10,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 10:16:10,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831399583] [2020-10-12 10:16:10,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:16:10,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:10,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:16:10,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:16:10,861 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2020-10-12 10:16:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:10,927 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-10-12 10:16:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 10:16:10,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-12 10:16:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:10,929 INFO L225 Difference]: With dead ends: 74 [2020-10-12 10:16:10,929 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 10:16:10,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:16:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 10:16:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2020-10-12 10:16:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:16:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-12 10:16:10,936 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2020-10-12 10:16:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:10,937 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-12 10:16:10,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:16:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-12 10:16:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 10:16:10,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:10,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:10,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:16:10,938 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:10,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1749271087, now seen corresponding path program 1 times [2020-10-12 10:16:10,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:10,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060139986] [2020-10-12 10:16:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:10,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:11,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 10:16:11,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:16:11,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-12 10:16:11,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:11,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:16:11,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:11,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:16:11,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:11,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:11,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:11,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:11,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:11,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:11,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:11,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:11,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060139986] [2020-10-12 10:16:11,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:11,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:16:11,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895253087] [2020-10-12 10:16:11,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:16:11,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:16:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:16:11,985 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 13 states. [2020-10-12 10:16:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:12,827 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-10-12 10:16:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:16:12,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-12 10:16:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:12,829 INFO L225 Difference]: With dead ends: 73 [2020-10-12 10:16:12,829 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 10:16:12,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:16:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 10:16:12,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2020-10-12 10:16:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:16:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-12 10:16:12,837 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 20 [2020-10-12 10:16:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:12,838 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-12 10:16:12,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:16:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-12 10:16:12,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 10:16:12,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:12,839 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:12,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:16:12,839 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:12,840 INFO L82 PathProgramCache]: Analyzing trace with hash -801527967, now seen corresponding path program 2 times [2020-10-12 10:16:12,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:12,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265704620] [2020-10-12 10:16:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:12,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:16:14,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:16:14,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-12 10:16:14,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:16:14,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:16:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:14,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:14,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:14,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:14,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:14,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265704620] [2020-10-12 10:16:14,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:14,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:16:14,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523704879] [2020-10-12 10:16:14,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:16:14,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:14,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:16:14,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:16:14,193 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 11 states. [2020-10-12 10:16:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:14,617 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2020-10-12 10:16:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:16:14,618 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-12 10:16:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:14,619 INFO L225 Difference]: With dead ends: 85 [2020-10-12 10:16:14,619 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 10:16:14,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:16:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 10:16:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2020-10-12 10:16:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:16:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2020-10-12 10:16:14,630 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 23 [2020-10-12 10:16:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:14,630 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2020-10-12 10:16:14,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:16:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2020-10-12 10:16:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 10:16:14,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:14,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:14,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:16:14,633 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1388333981, now seen corresponding path program 1 times [2020-10-12 10:16:14,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:14,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490572048] [2020-10-12 10:16:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:15,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:15,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:16:15,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:16:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1092 [2020-10-12 10:16:15,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:16:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:15,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:16:15,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:16,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:16,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:16,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:16,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:16,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:16,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:16,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:16,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:16,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:16,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:16,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490572048] [2020-10-12 10:16:16,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:16,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:16:16,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931164423] [2020-10-12 10:16:16,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:16:16,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:16:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:16:16,033 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand 10 states. [2020-10-12 10:16:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:16,243 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2020-10-12 10:16:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:16:16,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-12 10:16:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:16,246 INFO L225 Difference]: With dead ends: 89 [2020-10-12 10:16:16,247 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 10:16:16,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:16:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 10:16:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2020-10-12 10:16:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 10:16:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-10-12 10:16:16,268 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 23 [2020-10-12 10:16:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:16,269 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-10-12 10:16:16,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:16:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-10-12 10:16:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 10:16:16,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:16,276 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:16,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:16:16,276 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1203450856, now seen corresponding path program 2 times [2020-10-12 10:16:16,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:16,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876339597] [2020-10-12 10:16:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:16,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:16,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:17,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 10:16:17,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:16:17,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-12 10:16:17,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:17,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:16:17,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:16:17,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:16:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:17,086 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 10: A-local: [], B-local: [(main_~i~0_16 Int)]. [2020-10-12 10:16:17,087 ERROR L253 erpolLogProxyWrapper]: Interpolant 10 not inductive [2020-10-12 10:16:17,088 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 11: A-local: [], B-local: [(main_~i~0_16 Int)]. [2020-10-12 10:16:17,088 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 12: A-local: [], B-local: [(main_~i~0_16 Int)]. [2020-10-12 10:16:17,089 ERROR L253 erpolLogProxyWrapper]: Interpolant 13 not inductive [2020-10-12 10:16:17,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:16:17,091 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:849) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-12 10:16:17,098 INFO L168 Benchmark]: Toolchain (without parser) took 10955.87 ms. Allocated memory was 138.9 MB in the beginning and 320.3 MB in the end (delta: 181.4 MB). Free memory was 102.1 MB in the beginning and 202.0 MB in the end (delta: -99.8 MB). Peak memory consumption was 172.4 MB. Max. memory is 7.1 GB. [2020-10-12 10:16:17,099 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 10:16:17,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.45 ms. Allocated memory is still 138.9 MB. Free memory was 101.9 MB in the beginning and 92.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-10-12 10:16:17,105 INFO L168 Benchmark]: Boogie Preprocessor took 179.43 ms. Allocated memory was 138.9 MB in the beginning and 205.5 MB in the end (delta: 66.6 MB). Free memory was 92.1 MB in the beginning and 183.5 MB in the end (delta: -91.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-10-12 10:16:17,106 INFO L168 Benchmark]: RCFGBuilder took 360.95 ms. Allocated memory is still 205.5 MB. Free memory was 182.8 MB in the beginning and 167.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-10-12 10:16:17,107 INFO L168 Benchmark]: TraceAbstraction took 10148.35 ms. Allocated memory was 205.5 MB in the beginning and 320.3 MB in the end (delta: 114.8 MB). Free memory was 167.9 MB in the beginning and 202.0 MB in the end (delta: -34.0 MB). Peak memory consumption was 171.5 MB. Max. memory is 7.1 GB. [2020-10-12 10:16:17,121 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.45 ms. Allocated memory is still 138.9 MB. Free memory was 101.9 MB in the beginning and 92.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 179.43 ms. Allocated memory was 138.9 MB in the beginning and 205.5 MB in the end (delta: 66.6 MB). Free memory was 92.1 MB in the beginning and 183.5 MB in the end (delta: -91.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.95 ms. Allocated memory is still 205.5 MB. Free memory was 182.8 MB in the beginning and 167.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10148.35 ms. Allocated memory was 205.5 MB in the beginning and 320.3 MB in the end (delta: 114.8 MB). Free memory was 167.9 MB in the beginning and 202.0 MB in the end (delta: -34.0 MB). Peak memory consumption was 171.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...