/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:59:37,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:59:37,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:59:37,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:59:37,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:59:37,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:59:37,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:59:37,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:59:37,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:59:37,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:59:37,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:59:37,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:59:37,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:59:37,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:59:37,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:59:37,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:59:37,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:59:37,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:59:37,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:59:37,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:59:37,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:59:37,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:59:37,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:59:37,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:59:37,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:59:37,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:59:37,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:59:37,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:59:37,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:59:37,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:59:37,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:59:37,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:59:37,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:59:37,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:59:37,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:59:37,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:59:37,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:59:37,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:59:37,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:59:37,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:59:37,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:59:37,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:59:37,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:59:37,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:59:37,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:59:37,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:59:37,243 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:59:37,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:59:37,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:59:37,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:59:37,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:59:37,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:59:37,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:59:37,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:59:37,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:59:37,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:59:37,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:59:37,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:59:37,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:59:37,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:59:37,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:59:37,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:59:37,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:59:37,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:59:37,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:59:37,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:59:37,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:59:37,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:59:37,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:59:37,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:59:37,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:59:37,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:59:37,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:59:37,563 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:59:37,567 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:59:37,569 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:59:37,572 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:59:37,573 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:59:37,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/909e43bcb/41262f12e60d44a78a9c9b48952acaa9/FLAGeebbaa4be [2020-10-13 14:59:38,134 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:59:38,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:59:38,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/909e43bcb/41262f12e60d44a78a9c9b48952acaa9/FLAGeebbaa4be [2020-10-13 14:59:38,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/909e43bcb/41262f12e60d44a78a9c9b48952acaa9 [2020-10-13 14:59:38,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:59:38,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:59:38,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:59:38,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:59:38,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:59:38,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:59:38" (1/1) ... [2020-10-13 14:59:38,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156d188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:38, skipping insertion in model container [2020-10-13 14:59:38,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:59:38" (1/1) ... [2020-10-13 14:59:38,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:59:38,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:59:39,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:59:39,134 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:59:39,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:59:39,339 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:59:39,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39 WrapperNode [2020-10-13 14:59:39,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:59:39,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:59:39,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:59:39,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:59:39,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (1/1) ... [2020-10-13 14:59:39,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (1/1) ... [2020-10-13 14:59:39,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (1/1) ... [2020-10-13 14:59:39,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (1/1) ... [2020-10-13 14:59:39,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (1/1) ... [2020-10-13 14:59:39,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (1/1) ... [2020-10-13 14:59:39,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (1/1) ... [2020-10-13 14:59:39,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:59:39,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:59:39,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:59:39,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:59:39,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:59:39,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:59:39,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:59:39,540 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:59:39,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:59:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:59:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:59:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:59:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:59:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:59:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:59:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:59:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:59:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:59:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:59:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:59:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:59:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:59:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:59:39,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:59:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:59:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:59:41,082 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:59:41,082 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:59:41,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:59:41 BoogieIcfgContainer [2020-10-13 14:59:41,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:59:41,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:59:41,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:59:41,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:59:41,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:59:38" (1/3) ... [2020-10-13 14:59:41,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e7516a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:59:41, skipping insertion in model container [2020-10-13 14:59:41,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:59:39" (2/3) ... [2020-10-13 14:59:41,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e7516a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:59:41, skipping insertion in model container [2020-10-13 14:59:41,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:59:41" (3/3) ... [2020-10-13 14:59:41,099 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:59:41,110 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:59:41,119 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:59:41,135 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:59:41,167 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:59:41,167 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:59:41,168 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:59:41,170 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:59:41,170 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:59:41,170 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:59:41,170 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:59:41,171 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:59:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states. [2020-10-13 14:59:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 14:59:41,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:41,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:41,245 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:41,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2004415420, now seen corresponding path program 1 times [2020-10-13 14:59:41,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:41,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118090690] [2020-10-13 14:59:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:42,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:43,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:43,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:43,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:43,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:44,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:44,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:44,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:46,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:46,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:46,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-13 14:59:46,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:59:46,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 14:59:46,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:59:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:59:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:59:46,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:59:47,533 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 14:59:47,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:47,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:47,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:47,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:47,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:47,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 14:59:47,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:47,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:47,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:47,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:47,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:47,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118090690] [2020-10-13 14:59:47,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:47,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:47,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735906529] [2020-10-13 14:59:47,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:59:47,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:47,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:59:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:47,747 INFO L87 Difference]: Start difference. First operand 336 states. Second operand 5 states. [2020-10-13 14:59:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:51,336 INFO L93 Difference]: Finished difference Result 956 states and 1684 transitions. [2020-10-13 14:59:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:59:51,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-13 14:59:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:51,377 INFO L225 Difference]: With dead ends: 956 [2020-10-13 14:59:51,377 INFO L226 Difference]: Without dead ends: 641 [2020-10-13 14:59:51,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-10-13 14:59:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 639. [2020-10-13 14:59:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-10-13 14:59:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 929 transitions. [2020-10-13 14:59:51,561 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 929 transitions. Word has length 156 [2020-10-13 14:59:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:51,562 INFO L479 AbstractCegarLoop]: Abstraction has 639 states and 929 transitions. [2020-10-13 14:59:51,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 929 transitions. [2020-10-13 14:59:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 14:59:51,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:51,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:51,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:59:51,578 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:51,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:51,578 INFO L82 PathProgramCache]: Analyzing trace with hash -426003316, now seen corresponding path program 1 times [2020-10-13 14:59:51,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:51,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449590395] [2020-10-13 14:59:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:51,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:51,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:51,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:51,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:51,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:52,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:52,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:52,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:52,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:54,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:56,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 14:59:56,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:59:56,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:59:56,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:56,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:59:56,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:59:56,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:59:56,882 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 14:59:56,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:56,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:56,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:56,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:56,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:56,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:59:56,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:56,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:56,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:56,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:56,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:59:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:59:56,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449590395] [2020-10-13 14:59:56,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:56,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:56,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795327094] [2020-10-13 14:59:56,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:56,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:56,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:56,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:56,945 INFO L87 Difference]: Start difference. First operand 639 states and 929 transitions. Second operand 4 states. [2020-10-13 14:59:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:59,018 INFO L93 Difference]: Finished difference Result 1871 states and 2715 transitions. [2020-10-13 14:59:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:59:59,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2020-10-13 14:59:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:59,029 INFO L225 Difference]: With dead ends: 1871 [2020-10-13 14:59:59,029 INFO L226 Difference]: Without dead ends: 1264 [2020-10-13 14:59:59,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:59,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2020-10-13 14:59:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 641. [2020-10-13 14:59:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-13 14:59:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 931 transitions. [2020-10-13 14:59:59,083 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 931 transitions. Word has length 157 [2020-10-13 14:59:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:59,084 INFO L479 AbstractCegarLoop]: Abstraction has 641 states and 931 transitions. [2020-10-13 14:59:59,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 931 transitions. [2020-10-13 14:59:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 14:59:59,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:59,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:59,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:59:59,087 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1016836475, now seen corresponding path program 1 times [2020-10-13 14:59:59,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:59,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683139073] [2020-10-13 14:59:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:59,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:59,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:01,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:04,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:04,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 15:00:04,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:00:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 15:00:04,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 15:00:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 15:00:04,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:04,454 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:00:04,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:04,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:04,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:04,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:04,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 15:00:04,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:04,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:04,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 15:00:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:04,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683139073] [2020-10-13 15:00:04,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:04,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:04,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829572497] [2020-10-13 15:00:04,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:04,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:04,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:04,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:04,548 INFO L87 Difference]: Start difference. First operand 641 states and 931 transitions. Second operand 5 states. [2020-10-13 15:00:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:06,001 INFO L93 Difference]: Finished difference Result 1264 states and 1836 transitions. [2020-10-13 15:00:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:06,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-13 15:00:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:06,007 INFO L225 Difference]: With dead ends: 1264 [2020-10-13 15:00:06,007 INFO L226 Difference]: Without dead ends: 641 [2020-10-13 15:00:06,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-10-13 15:00:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 640. [2020-10-13 15:00:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-10-13 15:00:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 927 transitions. [2020-10-13 15:00:06,048 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 927 transitions. Word has length 158 [2020-10-13 15:00:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:06,049 INFO L479 AbstractCegarLoop]: Abstraction has 640 states and 927 transitions. [2020-10-13 15:00:06,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 927 transitions. [2020-10-13 15:00:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 15:00:06,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:06,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:06,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:00:06,052 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:06,052 INFO L82 PathProgramCache]: Analyzing trace with hash 109826193, now seen corresponding path program 1 times [2020-10-13 15:00:06,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:06,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800507766] [2020-10-13 15:00:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:06,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:06,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:07,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:08,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:08,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:11,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:11,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 15:00:11,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:00:11,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 15:00:11,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:11,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:00:11,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 15:00:11,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:11,439 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:00:11,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:11,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:11,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:11,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:11,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 15:00:11,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:11,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:11,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:11,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:11,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:11,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800507766] [2020-10-13 15:00:11,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:11,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:11,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737576914] [2020-10-13 15:00:11,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:11,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:11,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:11,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:11,518 INFO L87 Difference]: Start difference. First operand 640 states and 927 transitions. Second operand 5 states. [2020-10-13 15:00:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:13,432 INFO L93 Difference]: Finished difference Result 1826 states and 2633 transitions. [2020-10-13 15:00:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:13,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-13 15:00:13,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:13,439 INFO L225 Difference]: With dead ends: 1826 [2020-10-13 15:00:13,440 INFO L226 Difference]: Without dead ends: 1225 [2020-10-13 15:00:13,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2020-10-13 15:00:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1223. [2020-10-13 15:00:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1223 states. [2020-10-13 15:00:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1749 transitions. [2020-10-13 15:00:13,537 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1749 transitions. Word has length 158 [2020-10-13 15:00:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:13,539 INFO L479 AbstractCegarLoop]: Abstraction has 1223 states and 1749 transitions. [2020-10-13 15:00:13,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1749 transitions. [2020-10-13 15:00:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-13 15:00:13,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:13,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:13,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:00:13,545 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash -652906316, now seen corresponding path program 1 times [2020-10-13 15:00:13,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:13,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885005467] [2020-10-13 15:00:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:13,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:13,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:13,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:13,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:13,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:13,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:13,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:14,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:14,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:14,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:14,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:16,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:17,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:18,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:18,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 15:00:18,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 15:00:18,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 15:00:18,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:00:18,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 15:00:18,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:18,979 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:00:18,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:18,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:18,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:18,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:18,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:18,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:00:18,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:18,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:18,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:19,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885005467] [2020-10-13 15:00:19,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:19,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:19,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144679599] [2020-10-13 15:00:19,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:19,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:19,047 INFO L87 Difference]: Start difference. First operand 1223 states and 1749 transitions. Second operand 5 states. [2020-10-13 15:00:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:20,897 INFO L93 Difference]: Finished difference Result 2978 states and 4243 transitions. [2020-10-13 15:00:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:20,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-13 15:00:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:20,907 INFO L225 Difference]: With dead ends: 2978 [2020-10-13 15:00:20,908 INFO L226 Difference]: Without dead ends: 1788 [2020-10-13 15:00:20,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2020-10-13 15:00:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1786. [2020-10-13 15:00:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-10-13 15:00:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2519 transitions. [2020-10-13 15:00:21,015 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2519 transitions. Word has length 158 [2020-10-13 15:00:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:21,018 INFO L479 AbstractCegarLoop]: Abstraction has 1786 states and 2519 transitions. [2020-10-13 15:00:21,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2519 transitions. [2020-10-13 15:00:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 15:00:21,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:21,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:21,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:00:21,023 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:21,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1206366445, now seen corresponding path program 1 times [2020-10-13 15:00:21,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:21,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442836866] [2020-10-13 15:00:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:21,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:21,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:22,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:23,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:26,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:26,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 15:00:26,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 15:00:26,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:00:26,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:26,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:26,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 15:00:26,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 15:00:26,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:26,305 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:00:26,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:26,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:26,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:26,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:26,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:26,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:00:26,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:26,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:26,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:26,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442836866] [2020-10-13 15:00:26,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:26,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:26,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650909144] [2020-10-13 15:00:26,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:26,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:26,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:26,361 INFO L87 Difference]: Start difference. First operand 1786 states and 2519 transitions. Second operand 4 states. [2020-10-13 15:00:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:28,128 INFO L93 Difference]: Finished difference Result 3714 states and 5423 transitions. [2020-10-13 15:00:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:00:28,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-10-13 15:00:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:28,139 INFO L225 Difference]: With dead ends: 3714 [2020-10-13 15:00:28,140 INFO L226 Difference]: Without dead ends: 2254 [2020-10-13 15:00:28,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2020-10-13 15:00:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2210. [2020-10-13 15:00:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2210 states. [2020-10-13 15:00:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 3203 transitions. [2020-10-13 15:00:28,273 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 3203 transitions. Word has length 161 [2020-10-13 15:00:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:28,273 INFO L479 AbstractCegarLoop]: Abstraction has 2210 states and 3203 transitions. [2020-10-13 15:00:28,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 3203 transitions. [2020-10-13 15:00:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 15:00:28,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:28,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:28,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:00:28,281 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1376691361, now seen corresponding path program 1 times [2020-10-13 15:00:28,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:28,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547308339] [2020-10-13 15:00:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:28,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:28,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:28,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:28,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:28,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:28,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:29,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:29,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:29,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:32,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:33,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:33,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 15:00:33,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:00:33,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 15:00:33,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:00:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 15:00:33,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:33,626 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:00:33,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:33,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:33,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:33,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:33,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:33,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:00:33,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:33,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:33,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:33,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:33,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547308339] [2020-10-13 15:00:33,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:33,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:33,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488761555] [2020-10-13 15:00:33,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:33,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:33,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:33,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:33,700 INFO L87 Difference]: Start difference. First operand 2210 states and 3203 transitions. Second operand 5 states. [2020-10-13 15:00:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:36,477 INFO L93 Difference]: Finished difference Result 6381 states and 9218 transitions. [2020-10-13 15:00:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:36,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-10-13 15:00:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:36,494 INFO L225 Difference]: With dead ends: 6381 [2020-10-13 15:00:36,495 INFO L226 Difference]: Without dead ends: 4243 [2020-10-13 15:00:36,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2020-10-13 15:00:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 4241. [2020-10-13 15:00:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4241 states. [2020-10-13 15:00:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4241 states to 4241 states and 6076 transitions. [2020-10-13 15:00:36,814 INFO L78 Accepts]: Start accepts. Automaton has 4241 states and 6076 transitions. Word has length 164 [2020-10-13 15:00:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:36,815 INFO L479 AbstractCegarLoop]: Abstraction has 4241 states and 6076 transitions. [2020-10-13 15:00:36,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4241 states and 6076 transitions. [2020-10-13 15:00:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 15:00:36,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:36,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:36,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:00:36,823 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:36,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1911215797, now seen corresponding path program 1 times [2020-10-13 15:00:36,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:36,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573528620] [2020-10-13 15:00:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:36,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:36,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:36,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:37,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:37,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:37,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:37,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:37,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:37,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:37,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:38,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:38,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:38,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:39,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:39,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:39,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:39,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:40,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:41,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:41,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 15:00:41,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 15:00:41,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 15:00:41,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 15:00:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 15:00:41,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:00:42,156 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:00:42,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:42,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:42,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:42,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:42,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:42,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:00:42,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:42,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:42,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:42,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:42,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:42,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573528620] [2020-10-13 15:00:42,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:42,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:42,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16844188] [2020-10-13 15:00:42,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:42,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:42,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:42,203 INFO L87 Difference]: Start difference. First operand 4241 states and 6076 transitions. Second operand 4 states. [2020-10-13 15:00:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:45,152 INFO L93 Difference]: Finished difference Result 12584 states and 18020 transitions. [2020-10-13 15:00:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:00:45,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2020-10-13 15:00:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:45,187 INFO L225 Difference]: With dead ends: 12584 [2020-10-13 15:00:45,187 INFO L226 Difference]: Without dead ends: 8427 [2020-10-13 15:00:45,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8427 states. [2020-10-13 15:00:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8427 to 4249. [2020-10-13 15:00:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4249 states. [2020-10-13 15:00:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 6084 transitions. [2020-10-13 15:00:45,551 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 6084 transitions. Word has length 165 [2020-10-13 15:00:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:45,553 INFO L479 AbstractCegarLoop]: Abstraction has 4249 states and 6084 transitions. [2020-10-13 15:00:45,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 6084 transitions. [2020-10-13 15:00:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 15:00:45,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:45,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:45,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:00:45,561 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:45,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash -464253579, now seen corresponding path program 1 times [2020-10-13 15:00:45,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:45,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83850840] [2020-10-13 15:00:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:45,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:45,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:45,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:45,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:45,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:46,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:46,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:47,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:47,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:47,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:49,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:49,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:50,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:50,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 15:00:50,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 15:00:50,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:00:50,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:50,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:50,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 15:00:50,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 15:00:50,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:50,831 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:00:50,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:50,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:50,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:50,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:50,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:50,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:00:50,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:50,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:50,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83850840] [2020-10-13 15:00:50,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:50,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:50,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513822784] [2020-10-13 15:00:50,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:50,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:50,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:50,872 INFO L87 Difference]: Start difference. First operand 4249 states and 6084 transitions. Second operand 4 states. [2020-10-13 15:00:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:53,593 INFO L93 Difference]: Finished difference Result 11509 states and 16586 transitions. [2020-10-13 15:00:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:00:53,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2020-10-13 15:00:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:53,625 INFO L225 Difference]: With dead ends: 11509 [2020-10-13 15:00:53,625 INFO L226 Difference]: Without dead ends: 8167 [2020-10-13 15:00:53,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2020-10-13 15:00:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 8165. [2020-10-13 15:00:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8165 states. [2020-10-13 15:00:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8165 states to 8165 states and 11548 transitions. [2020-10-13 15:00:54,187 INFO L78 Accepts]: Start accepts. Automaton has 8165 states and 11548 transitions. Word has length 166 [2020-10-13 15:00:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:54,188 INFO L479 AbstractCegarLoop]: Abstraction has 8165 states and 11548 transitions. [2020-10-13 15:00:54,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 8165 states and 11548 transitions. [2020-10-13 15:00:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 15:00:54,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:54,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:54,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:00:54,200 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1917720046, now seen corresponding path program 1 times [2020-10-13 15:00:54,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:54,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406076784] [2020-10-13 15:00:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:54,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:54,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:54,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:54,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:54,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:54,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:54,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:55,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:56,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:56,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:56,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:57,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:57,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:58,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:59,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:59,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 15:00:59,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 15:00:59,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 15:00:59,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:59,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:59,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:00:59,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 15:00:59,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:59,474 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:00:59,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:59,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:59,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:59,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:59,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:59,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:00:59,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:59,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:00:59,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406076784] [2020-10-13 15:00:59,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:59,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:59,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044421726] [2020-10-13 15:00:59,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:59,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:59,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:59,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:59,508 INFO L87 Difference]: Start difference. First operand 8165 states and 11548 transitions. Second operand 5 states. [2020-10-13 15:01:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:01,668 INFO L93 Difference]: Finished difference Result 17280 states and 24174 transitions. [2020-10-13 15:01:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:01,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-10-13 15:01:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:01,687 INFO L225 Difference]: With dead ends: 17280 [2020-10-13 15:01:01,687 INFO L226 Difference]: Without dead ends: 8901 [2020-10-13 15:01:01,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:01:01,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2020-10-13 15:01:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 8899. [2020-10-13 15:01:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8899 states. [2020-10-13 15:01:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8899 states to 8899 states and 12310 transitions. [2020-10-13 15:01:02,169 INFO L78 Accepts]: Start accepts. Automaton has 8899 states and 12310 transitions. Word has length 166 [2020-10-13 15:01:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:02,170 INFO L479 AbstractCegarLoop]: Abstraction has 8899 states and 12310 transitions. [2020-10-13 15:01:02,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 8899 states and 12310 transitions. [2020-10-13 15:01:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 15:01:02,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:02,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:02,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:01:02,182 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:02,182 INFO L82 PathProgramCache]: Analyzing trace with hash 892946146, now seen corresponding path program 1 times [2020-10-13 15:01:02,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:02,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444622290] [2020-10-13 15:01:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:02,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:02,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:02,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:02,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:02,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:02,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:03,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:04,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:04,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:04,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:06,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:07,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:07,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:07,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 15:01:07,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:01:07,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 15:01:07,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:07,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:07,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:01:07,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 15:01:07,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:07,472 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:01:07,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:07,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:07,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:07,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:07,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:07,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:07,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:07,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:07,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444622290] [2020-10-13 15:01:07,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:07,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:07,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608089956] [2020-10-13 15:01:07,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:07,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:07,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:07,509 INFO L87 Difference]: Start difference. First operand 8899 states and 12310 transitions. Second operand 5 states. [2020-10-13 15:01:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:09,264 INFO L93 Difference]: Finished difference Result 17049 states and 23737 transitions. [2020-10-13 15:01:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:09,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-10-13 15:01:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:09,281 INFO L225 Difference]: With dead ends: 17049 [2020-10-13 15:01:09,282 INFO L226 Difference]: Without dead ends: 8439 [2020-10-13 15:01:09,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:01:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8439 states. [2020-10-13 15:01:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8439 to 8427. [2020-10-13 15:01:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8427 states. [2020-10-13 15:01:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8427 states to 8427 states and 11745 transitions. [2020-10-13 15:01:09,803 INFO L78 Accepts]: Start accepts. Automaton has 8427 states and 11745 transitions. Word has length 166 [2020-10-13 15:01:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:09,803 INFO L479 AbstractCegarLoop]: Abstraction has 8427 states and 11745 transitions. [2020-10-13 15:01:09,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8427 states and 11745 transitions. [2020-10-13 15:01:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 15:01:09,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:09,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:09,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:01:09,813 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:09,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:09,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1530039184, now seen corresponding path program 1 times [2020-10-13 15:01:09,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:09,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755168470] [2020-10-13 15:01:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:09,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:09,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:09,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:10,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:10,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:11,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:11,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:11,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:12,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:12,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:14,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:14,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 15:01:14,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:01:14,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 15:01:14,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 15:01:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 15:01:14,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:15,122 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:01:15,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:15,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:15,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:15,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:15,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:15,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:15,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:15,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:15,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:15,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:15,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:15,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755168470] [2020-10-13 15:01:15,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:15,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:15,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995814379] [2020-10-13 15:01:15,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:15,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:15,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:15,157 INFO L87 Difference]: Start difference. First operand 8427 states and 11745 transitions. Second operand 5 states. [2020-10-13 15:01:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:16,777 INFO L93 Difference]: Finished difference Result 11080 states and 15527 transitions. [2020-10-13 15:01:16,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:16,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-13 15:01:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:16,792 INFO L225 Difference]: With dead ends: 11080 [2020-10-13 15:01:16,792 INFO L226 Difference]: Without dead ends: 7853 [2020-10-13 15:01:16,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:01:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2020-10-13 15:01:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 7847. [2020-10-13 15:01:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7847 states. [2020-10-13 15:01:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7847 states to 7847 states and 11053 transitions. [2020-10-13 15:01:17,374 INFO L78 Accepts]: Start accepts. Automaton has 7847 states and 11053 transitions. Word has length 168 [2020-10-13 15:01:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:17,374 INFO L479 AbstractCegarLoop]: Abstraction has 7847 states and 11053 transitions. [2020-10-13 15:01:17,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 7847 states and 11053 transitions. [2020-10-13 15:01:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 15:01:17,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:17,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:17,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 15:01:17,380 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:17,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2127351938, now seen corresponding path program 1 times [2020-10-13 15:01:17,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:17,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213041038] [2020-10-13 15:01:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:17,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:17,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:18,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:20,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:22,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:22,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 15:01:22,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:01:22,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 15:01:22,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 15:01:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 15:01:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:22,630 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:01:22,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:22,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:22,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:22,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:22,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:22,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:01:22,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:22,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:22,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213041038] [2020-10-13 15:01:22,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:22,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:22,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491651378] [2020-10-13 15:01:22,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:22,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:22,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:22,673 INFO L87 Difference]: Start difference. First operand 7847 states and 11053 transitions. Second operand 4 states. [2020-10-13 15:01:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:25,068 INFO L93 Difference]: Finished difference Result 18501 states and 26836 transitions. [2020-10-13 15:01:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:01:25,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-10-13 15:01:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:25,091 INFO L225 Difference]: With dead ends: 18501 [2020-10-13 15:01:25,091 INFO L226 Difference]: Without dead ends: 11829 [2020-10-13 15:01:25,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11829 states. [2020-10-13 15:01:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11829 to 10639. [2020-10-13 15:01:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10639 states. [2020-10-13 15:01:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 15499 transitions. [2020-10-13 15:01:25,777 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 15499 transitions. Word has length 168 [2020-10-13 15:01:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:25,777 INFO L479 AbstractCegarLoop]: Abstraction has 10639 states and 15499 transitions. [2020-10-13 15:01:25,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 15499 transitions. [2020-10-13 15:01:25,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 15:01:25,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:25,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:25,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 15:01:25,783 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1517184551, now seen corresponding path program 1 times [2020-10-13 15:01:25,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:25,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376562192] [2020-10-13 15:01:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:25,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:26,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:27,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:30,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:30,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 15:01:30,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 15:01:30,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 15:01:30,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:30,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:30,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 15:01:30,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 15:01:30,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:31,087 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:01:31,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:31,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:31,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:31,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:31,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:31,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:31,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:31,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376562192] [2020-10-13 15:01:31,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:31,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:31,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414002111] [2020-10-13 15:01:31,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:31,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:31,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:31,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:31,126 INFO L87 Difference]: Start difference. First operand 10639 states and 15499 transitions. Second operand 5 states. [2020-10-13 15:01:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:32,829 INFO L93 Difference]: Finished difference Result 12979 states and 18967 transitions. [2020-10-13 15:01:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:32,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-13 15:01:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:32,840 INFO L225 Difference]: With dead ends: 12979 [2020-10-13 15:01:32,840 INFO L226 Difference]: Without dead ends: 8308 [2020-10-13 15:01:32,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:01:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8308 states. [2020-10-13 15:01:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8308 to 8298. [2020-10-13 15:01:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8298 states. [2020-10-13 15:01:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 12049 transitions. [2020-10-13 15:01:33,435 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 12049 transitions. Word has length 168 [2020-10-13 15:01:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:33,435 INFO L479 AbstractCegarLoop]: Abstraction has 8298 states and 12049 transitions. [2020-10-13 15:01:33,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 12049 transitions. [2020-10-13 15:01:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 15:01:33,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:33,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:33,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 15:01:33,440 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2074230711, now seen corresponding path program 1 times [2020-10-13 15:01:33,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:33,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215307710] [2020-10-13 15:01:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:33,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:33,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:33,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:33,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:33,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:33,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:33,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:34,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:35,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:35,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:35,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:37,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:37,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:38,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 15:01:38,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 15:01:38,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:01:38,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:38,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 15:01:38,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 15:01:38,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:01:38,814 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:01:38,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:38,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:38,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:38,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:38,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:38,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:01:38,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:38,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:01:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:38,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215307710] [2020-10-13 15:01:38,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:38,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:38,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171385837] [2020-10-13 15:01:38,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:38,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:38,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:38,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:38,893 INFO L87 Difference]: Start difference. First operand 8298 states and 12049 transitions. Second operand 4 states. [2020-10-13 15:01:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:41,415 INFO L93 Difference]: Finished difference Result 20170 states and 30192 transitions. [2020-10-13 15:01:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:01:41,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2020-10-13 15:01:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:41,431 INFO L225 Difference]: With dead ends: 20170 [2020-10-13 15:01:41,431 INFO L226 Difference]: Without dead ends: 13164 [2020-10-13 15:01:41,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2020-10-13 15:01:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 11462. [2020-10-13 15:01:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11462 states. [2020-10-13 15:01:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11462 states to 11462 states and 17064 transitions. [2020-10-13 15:01:42,067 INFO L78 Accepts]: Start accepts. Automaton has 11462 states and 17064 transitions. Word has length 170 [2020-10-13 15:01:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:42,067 INFO L479 AbstractCegarLoop]: Abstraction has 11462 states and 17064 transitions. [2020-10-13 15:01:42,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:01:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 11462 states and 17064 transitions. [2020-10-13 15:01:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 15:01:42,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:42,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:42,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 15:01:42,073 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash -824090511, now seen corresponding path program 1 times [2020-10-13 15:01:42,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:42,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081002693] [2020-10-13 15:01:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:42,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:42,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:45,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:45,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:47,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:47,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 15:01:47,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 15:01:47,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 15:01:47,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:47,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:01:47,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:01:47,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 15:01:47,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:47,374 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:01:47,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:47,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:47,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:47,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:47,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:47,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:47,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:47,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:47,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:47,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081002693] [2020-10-13 15:01:47,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:47,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:01:47,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718662454] [2020-10-13 15:01:47,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:01:47,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:47,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:01:47,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:01:47,420 INFO L87 Difference]: Start difference. First operand 11462 states and 17064 transitions. Second operand 5 states. [2020-10-13 15:01:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:01:50,906 INFO L93 Difference]: Finished difference Result 26422 states and 39654 transitions. [2020-10-13 15:01:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:01:50,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2020-10-13 15:01:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:01:50,928 INFO L225 Difference]: With dead ends: 26422 [2020-10-13 15:01:50,928 INFO L226 Difference]: Without dead ends: 16039 [2020-10-13 15:01:50,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:01:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16039 states. [2020-10-13 15:01:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16039 to 16037. [2020-10-13 15:01:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16037 states. [2020-10-13 15:01:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16037 states to 16037 states and 23557 transitions. [2020-10-13 15:01:51,944 INFO L78 Accepts]: Start accepts. Automaton has 16037 states and 23557 transitions. Word has length 171 [2020-10-13 15:01:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:01:51,944 INFO L479 AbstractCegarLoop]: Abstraction has 16037 states and 23557 transitions. [2020-10-13 15:01:51,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:01:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 16037 states and 23557 transitions. [2020-10-13 15:01:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 15:01:51,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:01:51,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:01:51,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 15:01:51,950 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:01:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:01:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1708251435, now seen corresponding path program 1 times [2020-10-13 15:01:51,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:01:51,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987674368] [2020-10-13 15:01:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:01:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:51,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:52,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:53,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:53,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:53,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:56,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:56,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 15:01:56,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:01:56,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 15:01:56,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:56,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:01:56,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 15:01:56,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 15:01:56,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:57,209 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:01:57,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:01:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:01:57,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:01:57,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:01:57,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:01:57,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:01:57,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:01:57,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:01:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:01:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:01:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:01:57,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:01:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:01:57,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987674368] [2020-10-13 15:01:57,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:01:57,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:01:57,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823635239] [2020-10-13 15:01:57,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:01:57,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:01:57,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:01:57,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:01:57,254 INFO L87 Difference]: Start difference. First operand 16037 states and 23557 transitions. Second operand 4 states. [2020-10-13 15:02:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:00,580 INFO L93 Difference]: Finished difference Result 20482 states and 30015 transitions. [2020-10-13 15:02:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:02:00,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2020-10-13 15:02:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:00,596 INFO L225 Difference]: With dead ends: 20482 [2020-10-13 15:02:00,596 INFO L226 Difference]: Without dead ends: 13810 [2020-10-13 15:02:00,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13810 states. [2020-10-13 15:02:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13810 to 13808. [2020-10-13 15:02:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13808 states. [2020-10-13 15:02:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 19993 transitions. [2020-10-13 15:02:01,616 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 19993 transitions. Word has length 173 [2020-10-13 15:02:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:01,617 INFO L479 AbstractCegarLoop]: Abstraction has 13808 states and 19993 transitions. [2020-10-13 15:02:01,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:02:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 19993 transitions. [2020-10-13 15:02:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 15:02:01,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:01,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:01,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 15:02:01,623 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:01,623 INFO L82 PathProgramCache]: Analyzing trace with hash -543591816, now seen corresponding path program 1 times [2020-10-13 15:02:01,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:01,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530133630] [2020-10-13 15:02:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:01,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:01,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:01,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:01,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:01,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:01,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:03,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:06,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:06,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 15:02:06,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:02:06,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:02:06,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:06,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:02:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 15:02:06,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:02:06,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:06,856 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:02:06,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:06,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:06,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:06,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:06,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:06,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:02:06,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:06,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:06,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:06,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:06,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:02:06,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530133630] [2020-10-13 15:02:06,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:06,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:02:06,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819247280] [2020-10-13 15:02:06,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:02:06,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:02:06,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:06,896 INFO L87 Difference]: Start difference. First operand 13808 states and 19993 transitions. Second operand 4 states. [2020-10-13 15:02:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:10,632 INFO L93 Difference]: Finished difference Result 37519 states and 55325 transitions. [2020-10-13 15:02:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:02:10,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2020-10-13 15:02:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:10,667 INFO L225 Difference]: With dead ends: 37519 [2020-10-13 15:02:10,667 INFO L226 Difference]: Without dead ends: 26487 [2020-10-13 15:02:10,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:02:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26487 states. [2020-10-13 15:02:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26487 to 26485. [2020-10-13 15:02:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26485 states. [2020-10-13 15:02:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26485 states to 26485 states and 38499 transitions. [2020-10-13 15:02:12,546 INFO L78 Accepts]: Start accepts. Automaton has 26485 states and 38499 transitions. Word has length 177 [2020-10-13 15:02:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:12,546 INFO L479 AbstractCegarLoop]: Abstraction has 26485 states and 38499 transitions. [2020-10-13 15:02:12,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:02:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 26485 states and 38499 transitions. [2020-10-13 15:02:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 15:02:12,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:12,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:12,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 15:02:12,556 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:12,556 INFO L82 PathProgramCache]: Analyzing trace with hash -927384067, now seen corresponding path program 1 times [2020-10-13 15:02:12,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:12,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700656818] [2020-10-13 15:02:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:12,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:12,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:12,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:12,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:12,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:12,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:12,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:13,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:14,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:14,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:17,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:17,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 15:02:17,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:02:17,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 15:02:17,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-13 15:02:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:02:17,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:17,827 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:02:17,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:17,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:17,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:17,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:17,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:02:17,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:17,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:17,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:02:17,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700656818] [2020-10-13 15:02:17,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:17,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:17,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84486056] [2020-10-13 15:02:17,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:17,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:17,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:17,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:17,871 INFO L87 Difference]: Start difference. First operand 26485 states and 38499 transitions. Second operand 5 states. [2020-10-13 15:02:23,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:23,210 INFO L93 Difference]: Finished difference Result 70849 states and 105377 transitions. [2020-10-13 15:02:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:23,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2020-10-13 15:02:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:23,281 INFO L225 Difference]: With dead ends: 70849 [2020-10-13 15:02:23,282 INFO L226 Difference]: Without dead ends: 49335 [2020-10-13 15:02:23,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:02:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49335 states. [2020-10-13 15:02:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49335 to 27653. [2020-10-13 15:02:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27653 states. [2020-10-13 15:02:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27653 states to 27653 states and 39777 transitions. [2020-10-13 15:02:25,544 INFO L78 Accepts]: Start accepts. Automaton has 27653 states and 39777 transitions. Word has length 177 [2020-10-13 15:02:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:25,544 INFO L479 AbstractCegarLoop]: Abstraction has 27653 states and 39777 transitions. [2020-10-13 15:02:25,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 27653 states and 39777 transitions. [2020-10-13 15:02:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 15:02:25,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:25,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:25,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 15:02:25,557 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1476818842, now seen corresponding path program 1 times [2020-10-13 15:02:25,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:25,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512827636] [2020-10-13 15:02:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:25,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:25,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:28,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:28,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:29,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:29,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:30,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:30,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 15:02:30,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:02:30,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:02:30,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:02:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 15:02:30,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 15:02:30,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:30,845 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:02:30,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:30,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:30,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:30,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:30,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:30,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:02:30,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:02:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:30,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 15:02:30,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:02:30,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512827636] [2020-10-13 15:02:30,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:30,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:30,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572051254] [2020-10-13 15:02:30,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:02:30,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:30,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:02:30,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:02:30,899 INFO L87 Difference]: Start difference. First operand 27653 states and 39777 transitions. Second operand 6 states. [2020-10-13 15:02:31,145 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-13 15:02:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:35,958 INFO L93 Difference]: Finished difference Result 61941 states and 91279 transitions. [2020-10-13 15:02:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 15:02:35,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2020-10-13 15:02:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:36,004 INFO L225 Difference]: With dead ends: 61941 [2020-10-13 15:02:36,004 INFO L226 Difference]: Without dead ends: 36318 [2020-10-13 15:02:36,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 15:02:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36318 states. [2020-10-13 15:02:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36318 to 36316. [2020-10-13 15:02:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36316 states. [2020-10-13 15:02:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36316 states to 36316 states and 53599 transitions. [2020-10-13 15:02:38,851 INFO L78 Accepts]: Start accepts. Automaton has 36316 states and 53599 transitions. Word has length 177 [2020-10-13 15:02:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:38,852 INFO L479 AbstractCegarLoop]: Abstraction has 36316 states and 53599 transitions. [2020-10-13 15:02:38,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:02:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36316 states and 53599 transitions. [2020-10-13 15:02:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 15:02:38,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:38,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:38,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 15:02:38,859 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:38,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1107826342, now seen corresponding path program 1 times [2020-10-13 15:02:38,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:38,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925576036] [2020-10-13 15:02:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:38,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:38,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:39,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:43,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:43,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:43,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:43,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 15:02:43,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:02:43,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 15:02:43,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:02:43,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 15:02:43,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:44,157 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:02:44,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:44,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:44,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:44,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:44,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:44,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:02:44,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:44,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:44,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:02:44,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925576036] [2020-10-13 15:02:44,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:44,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:44,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078877722] [2020-10-13 15:02:44,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:44,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:44,217 INFO L87 Difference]: Start difference. First operand 36316 states and 53599 transitions. Second operand 5 states. [2020-10-13 15:02:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:02:49,662 INFO L93 Difference]: Finished difference Result 47960 states and 70820 transitions. [2020-10-13 15:02:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:02:49,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2020-10-13 15:02:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:02:49,712 INFO L225 Difference]: With dead ends: 47960 [2020-10-13 15:02:49,712 INFO L226 Difference]: Without dead ends: 36315 [2020-10-13 15:02:49,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:02:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36315 states. [2020-10-13 15:02:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36315 to 36053. [2020-10-13 15:02:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36053 states. [2020-10-13 15:02:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36053 states to 36053 states and 53293 transitions. [2020-10-13 15:02:53,187 INFO L78 Accepts]: Start accepts. Automaton has 36053 states and 53293 transitions. Word has length 177 [2020-10-13 15:02:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:02:53,187 INFO L479 AbstractCegarLoop]: Abstraction has 36053 states and 53293 transitions. [2020-10-13 15:02:53,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:02:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 36053 states and 53293 transitions. [2020-10-13 15:02:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 15:02:53,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:02:53,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:02:53,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 15:02:53,194 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:02:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:02:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash -478281566, now seen corresponding path program 1 times [2020-10-13 15:02:53,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:02:53,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925996676] [2020-10-13 15:02:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:02:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:53,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:53,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:53,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:53,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:54,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:54,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:56,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:57,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:58,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:58,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 15:02:58,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:02:58,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 15:02:58,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:02:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:02:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 15:02:58,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:58,460 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:02:58,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:02:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:02:58,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:02:58,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:02:58,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:02:58,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:02:58,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:02:58,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:02:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:02:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:02:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:02:58,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:02:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:02:58,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925996676] [2020-10-13 15:02:58,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:02:58,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:02:58,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931950313] [2020-10-13 15:02:58,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:02:58,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:02:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:02:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:02:58,507 INFO L87 Difference]: Start difference. First operand 36053 states and 53293 transitions. Second operand 5 states. [2020-10-13 15:03:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:03:03,127 INFO L93 Difference]: Finished difference Result 44607 states and 66064 transitions. [2020-10-13 15:03:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:03:03,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-10-13 15:03:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:03:03,168 INFO L225 Difference]: With dead ends: 44607 [2020-10-13 15:03:03,168 INFO L226 Difference]: Without dead ends: 33017 [2020-10-13 15:03:03,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:03:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33017 states. [2020-10-13 15:03:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33017 to 32860. [2020-10-13 15:03:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32860 states. [2020-10-13 15:03:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32860 states to 32860 states and 48718 transitions. [2020-10-13 15:03:07,087 INFO L78 Accepts]: Start accepts. Automaton has 32860 states and 48718 transitions. Word has length 179 [2020-10-13 15:03:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:03:07,087 INFO L479 AbstractCegarLoop]: Abstraction has 32860 states and 48718 transitions. [2020-10-13 15:03:07,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:03:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 32860 states and 48718 transitions. [2020-10-13 15:03:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 15:03:07,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:03:07,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:03:07,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 15:03:07,093 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:03:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:03:07,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1261624346, now seen corresponding path program 1 times [2020-10-13 15:03:07,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:03:07,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002858545] [2020-10-13 15:03:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:03:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:03:07,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:07,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:12,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:03:12,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-13 15:03:12,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:03:12,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 15:03:12,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:03:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:03:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-13 15:03:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:03:12,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:03:12,400 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 15:03:12,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:03:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:03:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:03:12,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:03:12,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:03:12,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:03:12,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:03:12,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:03:12,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:03:12,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:03:12,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:03:12,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:03:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:03:12,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002858545] [2020-10-13 15:03:12,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:03:12,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:03:12,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999699591] [2020-10-13 15:03:12,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:03:12,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:03:12,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:03:12,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:03:12,440 INFO L87 Difference]: Start difference. First operand 32860 states and 48718 transitions. Second operand 5 states. [2020-10-13 15:03:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:03:20,248 INFO L93 Difference]: Finished difference Result 91454 states and 137866 transitions. [2020-10-13 15:03:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:03:20,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-10-13 15:03:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:03:20,324 INFO L225 Difference]: With dead ends: 91454 [2020-10-13 15:03:20,324 INFO L226 Difference]: Without dead ends: 63206 [2020-10-13 15:03:20,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:03:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63206 states.