/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:25:18,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:25:18,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:25:18,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:25:18,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:25:18,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:25:18,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:25:18,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:25:18,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:25:18,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:25:18,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:25:18,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:25:18,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:25:18,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:25:18,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:25:18,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:25:18,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:25:18,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:25:18,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:25:18,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:25:18,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:25:18,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:25:18,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:25:18,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:25:18,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:25:18,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:25:18,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:25:18,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:25:18,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:25:18,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:25:18,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:25:18,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:25:18,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:25:18,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:25:18,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:25:18,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:25:18,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:25:18,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:25:18,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:25:18,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:25:18,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:25:18,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:25:19,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:25:19,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:25:19,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:25:19,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:25:19,028 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:25:19,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:25:19,029 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:25:19,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:25:19,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:25:19,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:25:19,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:25:19,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:25:19,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:25:19,031 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:25:19,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:25:19,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:25:19,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:25:19,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:25:19,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:25:19,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:25:19,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:25:19,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:25:19,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:25:19,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:25:19,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:25:19,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:25:19,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:25:19,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:25:19,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:25:19,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:25:19,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:25:19,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:25:19,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:25:19,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:25:19,542 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:25:19,543 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-25 11:25:19,640 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e88f5ed9/b841964e05ef43e3a28245f6789308b6/FLAGe96ec25c6 [2020-09-25 11:25:20,180 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:25:20,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-09-25 11:25:20,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e88f5ed9/b841964e05ef43e3a28245f6789308b6/FLAGe96ec25c6 [2020-09-25 11:25:20,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e88f5ed9/b841964e05ef43e3a28245f6789308b6 [2020-09-25 11:25:20,538 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:25:20,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:25:20,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:25:20,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:25:20,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:25:20,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7decd891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20, skipping insertion in model container [2020-09-25 11:25:20,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:25:20,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:25:20,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:25:20,832 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:25:20,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:25:20,866 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:25:20,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20 WrapperNode [2020-09-25 11:25:20,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:25:20,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:25:20,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:25:20,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:25:20,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (1/1) ... [2020-09-25 11:25:20,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:25:20,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:25:20,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:25:20,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:25:20,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:25:21,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:25:21,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:25:21,072 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 11:25:21,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:25:21,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 11:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:25:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:25:21,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:25:21,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:25:21,305 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:25:21,306 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 11:25:21,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:25:21 BoogieIcfgContainer [2020-09-25 11:25:21,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:25:21,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:25:21,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:25:21,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:25:21,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:25:20" (1/3) ... [2020-09-25 11:25:21,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2ce726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:25:21, skipping insertion in model container [2020-09-25 11:25:21,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:25:20" (2/3) ... [2020-09-25 11:25:21,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2ce726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:25:21, skipping insertion in model container [2020-09-25 11:25:21,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:25:21" (3/3) ... [2020-09-25 11:25:21,338 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-09-25 11:25:21,360 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:25:21,372 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:25:21,424 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:25:21,470 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:25:21,471 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:25:21,471 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:25:21,471 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:25:21,471 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:25:21,471 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:25:21,471 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:25:21,472 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:25:21,491 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 11:25:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 11:25:21,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:21,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:21,500 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:21,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:21,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1930258608, now seen corresponding path program 1 times [2020-09-25 11:25:21,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:21,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71909804] [2020-09-25 11:25:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:21,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:21,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 11:25:21,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:21,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 11:25:21,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:21,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:21,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:21,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 11:25:21,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:21,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:25:21,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:21,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:21,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:21,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:21,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:25:21,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:21,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:21,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:21,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:21,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71909804] [2020-09-25 11:25:21,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:25:21,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 11:25:21,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038369833] [2020-09-25 11:25:21,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 11:25:21,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 11:25:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 11:25:21,767 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 11:25:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:21,800 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-09-25 11:25:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 11:25:21,802 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-25 11:25:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:21,814 INFO L225 Difference]: With dead ends: 48 [2020-09-25 11:25:21,814 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 11:25:21,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 11:25:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 11:25:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-25 11:25:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 11:25:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-09-25 11:25:21,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-09-25 11:25:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:21,873 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-09-25 11:25:21,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 11:25:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-09-25 11:25:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 11:25:21,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:21,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:21,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:25:21,876 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:21,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1900705936, now seen corresponding path program 1 times [2020-09-25 11:25:21,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:21,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845300341] [2020-09-25 11:25:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:21,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 11:25:21,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:21,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 11:25:21,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:21,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:25:21,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:21,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:21,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:21,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:21,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:21,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:21,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:25:21,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:21,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:21,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:21,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:21,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:21,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:21,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845300341] [2020-09-25 11:25:21,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:25:21,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 11:25:21,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354402084] [2020-09-25 11:25:22,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 11:25:22,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:22,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 11:25:22,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 11:25:22,001 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2020-09-25 11:25:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:22,056 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-09-25 11:25:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 11:25:22,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-25 11:25:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:22,059 INFO L225 Difference]: With dead ends: 29 [2020-09-25 11:25:22,059 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 11:25:22,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 11:25:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 11:25:22,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-25 11:25:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 11:25:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-25 11:25:22,068 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-09-25 11:25:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:22,068 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-25 11:25:22,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 11:25:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-25 11:25:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 11:25:22,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:22,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:22,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:25:22,076 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1024587775, now seen corresponding path program 1 times [2020-09-25 11:25:22,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:22,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386814859] [2020-09-25 11:25:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:22,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:22,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:22,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:22,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 11:25:22,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:25:22,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-09-25 11:25:22,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:22,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:22,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:25:22,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:22,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:25:22,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:25:22,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:22,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:22,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:22,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:22,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:22,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:22,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:22,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:22,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:22,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:22,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:22,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:22,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386814859] [2020-09-25 11:25:22,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:22,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-25 11:25:22,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812775324] [2020-09-25 11:25:22,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:25:22,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:22,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:25:22,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:25:22,546 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-09-25 11:25:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:22,615 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-09-25 11:25:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:25:22,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-25 11:25:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:22,617 INFO L225 Difference]: With dead ends: 36 [2020-09-25 11:25:22,617 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 11:25:22,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:25:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 11:25:22,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-25 11:25:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 11:25:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-25 11:25:22,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-09-25 11:25:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:22,633 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-25 11:25:22,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:25:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-25 11:25:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 11:25:22,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:22,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:22,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:25:22,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:22,636 INFO L82 PathProgramCache]: Analyzing trace with hash 713803248, now seen corresponding path program 2 times [2020-09-25 11:25:22,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:22,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896469064] [2020-09-25 11:25:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:22,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:22,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:22,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:22,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:22,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:22,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 11:25:22,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:25:22,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-09-25 11:25:22,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:22,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:22,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:25:22,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:22,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:25:22,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:23,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:23,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:23,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:23,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:23,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:25:23,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:23,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:23,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:23,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:23,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:25:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:23,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896469064] [2020-09-25 11:25:23,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:23,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:25:23,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414944314] [2020-09-25 11:25:23,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:25:23,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:23,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:25:23,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:25:23,046 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-09-25 11:25:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:23,118 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-09-25 11:25:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:25:23,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 11:25:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:23,123 INFO L225 Difference]: With dead ends: 43 [2020-09-25 11:25:23,124 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 11:25:23,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:25:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 11:25:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-25 11:25:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 11:25:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-09-25 11:25:23,143 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-09-25 11:25:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:23,145 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-09-25 11:25:23,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:25:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-09-25 11:25:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 11:25:23,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:23,149 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:23,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:25:23,149 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:23,150 INFO L82 PathProgramCache]: Analyzing trace with hash 761923231, now seen corresponding path program 3 times [2020-09-25 11:25:23,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:23,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651167050] [2020-09-25 11:25:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:23,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:23,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 11:25:23,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 11:25:23,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-09-25 11:25:23,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:23,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:23,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:25:23,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:23,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 11:25:23,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:23,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:23,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:23,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:23,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:23,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:23,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:23,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:23,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:23,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651167050] [2020-09-25 11:25:23,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:23,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:25:23,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809780502] [2020-09-25 11:25:23,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:25:23,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:23,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:25:23,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:25:23,767 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-09-25 11:25:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:23,820 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 11:25:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:25:23,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-25 11:25:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:23,822 INFO L225 Difference]: With dead ends: 50 [2020-09-25 11:25:23,822 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 11:25:23,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:25:23,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 11:25:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-09-25 11:25:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 11:25:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-09-25 11:25:23,831 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 30 [2020-09-25 11:25:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:23,831 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-09-25 11:25:23,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:25:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-09-25 11:25:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 11:25:23,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:23,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:23,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:25:23,833 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:23,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1508648112, now seen corresponding path program 4 times [2020-09-25 11:25:23,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:23,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789865781] [2020-09-25 11:25:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:23,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:23,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:24,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 11:25:24,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:25:24,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-09-25 11:25:24,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:24,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:25:24,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:24,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 11:25:24,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:24,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:24,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:24,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:24,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:24,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:24,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:24,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:24,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:25:24,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789865781] [2020-09-25 11:25:24,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:24,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:25:24,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185147475] [2020-09-25 11:25:24,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:25:24,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:25:24,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:25:24,436 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2020-09-25 11:25:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:24,493 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-09-25 11:25:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:25:24,494 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-25 11:25:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:24,495 INFO L225 Difference]: With dead ends: 57 [2020-09-25 11:25:24,495 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 11:25:24,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:25:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 11:25:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-25 11:25:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 11:25:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-09-25 11:25:24,515 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 35 [2020-09-25 11:25:24,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:24,515 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-09-25 11:25:24,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:25:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-09-25 11:25:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 11:25:24,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:24,517 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:24,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:25:24,518 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash 544755007, now seen corresponding path program 5 times [2020-09-25 11:25:24,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:24,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925535903] [2020-09-25 11:25:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:24,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:25,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 11:25:25,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:25:25,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-09-25 11:25:25,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:25,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:25:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 11:25:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 11:25:25,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:25,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:25,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:25,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:25,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:25,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:25,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:25,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-09-25 11:25:25,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925535903] [2020-09-25 11:25:25,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:25:25,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 11:25:25,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951620988] [2020-09-25 11:25:25,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 11:25:25,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:25,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 11:25:25,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 11:25:25,298 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 3 states. [2020-09-25 11:25:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:25,325 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-09-25 11:25:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 11:25:25,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-09-25 11:25:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:25,327 INFO L225 Difference]: With dead ends: 90 [2020-09-25 11:25:25,328 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 11:25:25,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 11:25:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 11:25:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-09-25 11:25:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 11:25:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-09-25 11:25:25,347 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 40 [2020-09-25 11:25:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:25,348 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-09-25 11:25:25,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 11:25:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-09-25 11:25:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 11:25:25,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:25,354 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:25,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:25:25,357 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash -492420320, now seen corresponding path program 1 times [2020-09-25 11:25:25,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:25,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007814409] [2020-09-25 11:25:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:25,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:28,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:30,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 11:25:30,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-09-25 11:25:30,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 11:25:30,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:30,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:30,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:25:30,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 11:25:30,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 11:25:30,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:30,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:30,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:30,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:30,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:30,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:30,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:30,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:30,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:30,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:30,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:30,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-25 11:25:30,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007814409] [2020-09-25 11:25:30,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:30,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:25:30,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11428795] [2020-09-25 11:25:30,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:25:30,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:25:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:25:30,416 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 5 states. [2020-09-25 11:25:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:30,476 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-09-25 11:25:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:25:30,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-09-25 11:25:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:30,477 INFO L225 Difference]: With dead ends: 92 [2020-09-25 11:25:30,478 INFO L226 Difference]: Without dead ends: 62 [2020-09-25 11:25:30,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:25:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-25 11:25:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-09-25 11:25:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 11:25:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-09-25 11:25:30,486 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 42 [2020-09-25 11:25:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:30,487 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-09-25 11:25:30,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:25:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-09-25 11:25:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 11:25:30,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:30,488 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:30,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:25:30,488 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash 534884511, now seen corresponding path program 2 times [2020-09-25 11:25:30,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:30,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34762552] [2020-09-25 11:25:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:30,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:31,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:34,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:35,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 11:25:35,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-09-25 11:25:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 11:25:35,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:35,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:35,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:25:35,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:35,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 11:25:35,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:35,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:35,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:35,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:35,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:35,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:25:35,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:35,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:35,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:35,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 11:25:35,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34762552] [2020-09-25 11:25:35,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:35,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 11:25:35,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428997072] [2020-09-25 11:25:35,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:25:35,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:35,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:25:35,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:25:35,601 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 8 states. [2020-09-25 11:25:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:35,669 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-09-25 11:25:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:25:35,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-09-25 11:25:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:35,672 INFO L225 Difference]: With dead ends: 73 [2020-09-25 11:25:35,673 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 11:25:35,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:25:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 11:25:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-25 11:25:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 11:25:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-09-25 11:25:35,684 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 44 [2020-09-25 11:25:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:35,685 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-09-25 11:25:35,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:25:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-09-25 11:25:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 11:25:35,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:35,686 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:35,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:25:35,687 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:35,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1110019760, now seen corresponding path program 3 times [2020-09-25 11:25:35,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:35,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141125070] [2020-09-25 11:25:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:36,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:38,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:40,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:40,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 11:25:40,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-09-25 11:25:40,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 11:25:40,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:40,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:40,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:25:40,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:40,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 11:25:40,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:40,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:40,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:40,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:40,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:40,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-09-25 11:25:40,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141125070] [2020-09-25 11:25:40,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:40,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 11:25:40,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214487264] [2020-09-25 11:25:40,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:25:40,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:40,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:25:40,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:25:40,811 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 8 states. [2020-09-25 11:25:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:40,937 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2020-09-25 11:25:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:25:40,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-09-25 11:25:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:40,939 INFO L225 Difference]: With dead ends: 114 [2020-09-25 11:25:40,940 INFO L226 Difference]: Without dead ends: 64 [2020-09-25 11:25:40,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:25:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-25 11:25:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-09-25 11:25:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-25 11:25:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-09-25 11:25:40,958 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 49 [2020-09-25 11:25:40,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:40,958 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-09-25 11:25:40,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:25:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-09-25 11:25:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 11:25:40,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:40,960 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:40,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 11:25:40,960 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash 562903469, now seen corresponding path program 4 times [2020-09-25 11:25:40,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:40,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057708497] [2020-09-25 11:25:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:40,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:41,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:42,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:44,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:44,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 11:25:44,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:25:44,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3396 [2020-09-25 11:25:44,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:44,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 11:25:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 11:25:44,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:44,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:44,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:44,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:44,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:44,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:44,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:44,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:44,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:44,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:44,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:44,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:44,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-25 11:25:44,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057708497] [2020-09-25 11:25:44,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:44,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 11:25:44,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571134703] [2020-09-25 11:25:44,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 11:25:44,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:44,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 11:25:44,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:25:44,463 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 8 states. [2020-09-25 11:25:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:44,617 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2020-09-25 11:25:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:25:44,618 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-25 11:25:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:44,619 INFO L225 Difference]: With dead ends: 110 [2020-09-25 11:25:44,619 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 11:25:44,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-25 11:25:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 11:25:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-09-25 11:25:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-25 11:25:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-09-25 11:25:44,639 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 51 [2020-09-25 11:25:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:44,640 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-09-25 11:25:44,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 11:25:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-09-25 11:25:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 11:25:44,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:44,641 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:44,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 11:25:44,641 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:44,643 INFO L82 PathProgramCache]: Analyzing trace with hash -140083924, now seen corresponding path program 5 times [2020-09-25 11:25:44,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:44,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790686891] [2020-09-25 11:25:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:44,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:44,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:44,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:49,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:49,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 11:25:49,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 11:25:49,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4846 [2020-09-25 11:25:49,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:49,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:49,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 11:25:49,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:49,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:49,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:49,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:49,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:49,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:49,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:25:49,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:49,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:49,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:25:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-09-25 11:25:49,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790686891] [2020-09-25 11:25:49,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:49,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:49,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298872315] [2020-09-25 11:25:49,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:49,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:49,618 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-09-25 11:25:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:49,784 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2020-09-25 11:25:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 11:25:49,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-09-25 11:25:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:49,785 INFO L225 Difference]: With dead ends: 112 [2020-09-25 11:25:49,785 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 11:25:49,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:25:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 11:25:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-25 11:25:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 11:25:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-09-25 11:25:49,795 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 53 [2020-09-25 11:25:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:49,796 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-09-25 11:25:49,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-09-25 11:25:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 11:25:49,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:49,798 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:49,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 11:25:49,798 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1401103125, now seen corresponding path program 6 times [2020-09-25 11:25:49,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:49,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256533575] [2020-09-25 11:25:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:49,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:49,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:49,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:50,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:51,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:54,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:54,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 11:25:54,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 11:25:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 11:25:54,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:54,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:25:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 11:25:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:54,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:25:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:54,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:54,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:54,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:25:54,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:25:54,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:25:54,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:54,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:54,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:25:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:25:54,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:25:54,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:25:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-25 11:25:54,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256533575] [2020-09-25 11:25:54,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:25:54,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:25:54,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534418027] [2020-09-25 11:25:54,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:25:54,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:25:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:25:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:54,912 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 9 states. [2020-09-25 11:25:54,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:25:54,968 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-09-25 11:25:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 11:25:54,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-09-25 11:25:54,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:25:54,970 INFO L225 Difference]: With dead ends: 80 [2020-09-25 11:25:54,970 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 11:25:54,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:25:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 11:25:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-09-25 11:25:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 11:25:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-09-25 11:25:54,985 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 55 [2020-09-25 11:25:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:25:54,985 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-09-25 11:25:54,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:25:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-09-25 11:25:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 11:25:54,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:25:54,986 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:25:54,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 11:25:54,987 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:25:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:25:54,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1896289412, now seen corresponding path program 7 times [2020-09-25 11:25:54,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:25:54,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351847811] [2020-09-25 11:25:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:25:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:25:55,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:55,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:25:59,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:25:59,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 11:25:59,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 11:25:59,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 11:25:59,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:25:59,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:25:59,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:25:59,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:25:59,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 11:25:59,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:26:00,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:00,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:00,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:26:00,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:00,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:00,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:00,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:00,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:00,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:26:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-25 11:26:00,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351847811] [2020-09-25 11:26:00,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:00,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:26:00,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705771859] [2020-09-25 11:26:00,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:26:00,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:26:00,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:26:00,084 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 10 states. [2020-09-25 11:26:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:00,171 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-09-25 11:26:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:26:00,172 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-09-25 11:26:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:00,173 INFO L225 Difference]: With dead ends: 87 [2020-09-25 11:26:00,173 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 11:26:00,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:26:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 11:26:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-09-25 11:26:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 11:26:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-09-25 11:26:00,180 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 60 [2020-09-25 11:26:00,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:00,181 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-09-25 11:26:00,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:26:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-09-25 11:26:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 11:26:00,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:00,182 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:00,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 11:26:00,182 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:00,183 INFO L82 PathProgramCache]: Analyzing trace with hash -765676405, now seen corresponding path program 8 times [2020-09-25 11:26:00,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:00,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313984883] [2020-09-25 11:26:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:00,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:05,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 11:26:05,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 11:26:05,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 11:26:05,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:05,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:05,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 11:26:05,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:26:05,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 11:26:05,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:26:05,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:05,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:05,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:05,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:05,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:26:05,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:05,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:05,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:26:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-09-25 11:26:05,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313984883] [2020-09-25 11:26:05,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:05,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 11:26:05,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983069699] [2020-09-25 11:26:05,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 11:26:05,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 11:26:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:26:05,287 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 10 states. [2020-09-25 11:26:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:05,507 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2020-09-25 11:26:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 11:26:05,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-09-25 11:26:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:05,508 INFO L225 Difference]: With dead ends: 142 [2020-09-25 11:26:05,508 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 11:26:05,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:26:05,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 11:26:05,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-09-25 11:26:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 11:26:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-09-25 11:26:05,515 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 65 [2020-09-25 11:26:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:05,515 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-09-25 11:26:05,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 11:26:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-09-25 11:26:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 11:26:05,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:05,516 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:05,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 11:26:05,517 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1990300214, now seen corresponding path program 9 times [2020-09-25 11:26:05,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:05,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940522154] [2020-09-25 11:26:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:05,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:06,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:10,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:10,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 11:26:10,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-25 11:26:10,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 11:26:10,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:10,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:26:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 11:26:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 11:26:10,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:26:10,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:10,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:10,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:10,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:10,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:10,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:26:10,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:10,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:10,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:10,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:10,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:10,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:26:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 58 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-25 11:26:10,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940522154] [2020-09-25 11:26:10,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:10,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:26:10,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315054294] [2020-09-25 11:26:10,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:26:10,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:26:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:26:10,638 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 11 states. [2020-09-25 11:26:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:10,916 INFO L93 Difference]: Finished difference Result 144 states and 176 transitions. [2020-09-25 11:26:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 11:26:10,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-09-25 11:26:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:10,918 INFO L225 Difference]: With dead ends: 144 [2020-09-25 11:26:10,918 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 11:26:10,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-25 11:26:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 11:26:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-25 11:26:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 11:26:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-09-25 11:26:10,926 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 67 [2020-09-25 11:26:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:10,930 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-09-25 11:26:10,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:26:10,930 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-09-25 11:26:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 11:26:10,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:10,930 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:10,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 11:26:10,931 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2032741559, now seen corresponding path program 10 times [2020-09-25 11:26:10,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:10,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422406534] [2020-09-25 11:26:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:10,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:10,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking...