/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_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:38:15,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:38:15,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:38:15,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:38:15,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:38:15,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:38:15,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:38:15,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:38:15,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:38:15,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:38:15,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:38:15,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:38:15,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:38:15,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:38:15,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:38:15,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:38:15,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:38:15,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:38:15,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:38:15,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:38:15,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:38:15,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:38:15,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:38:15,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:38:15,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:38:15,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:38:15,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:38:15,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:38:15,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:38:15,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:38:15,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:38:15,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:38:15,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:38:15,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:38:15,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:38:15,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:38:15,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:38:15,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:38:15,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:38:15,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:38:15,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:38:15,278 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 14:38:15,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:38:15,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:38:15,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:38:15,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:38:15,326 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:38:15,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:38:15,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:38:15,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:38:15,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:38:15,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:38:15,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:38:15,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:38:15,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:38:15,327 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:38:15,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:38:15,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:38:15,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:38:15,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:38:15,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:38:15,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:38:15,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:38:15,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:38:15,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:38:15,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:38:15,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:38:15,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:38:15,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:38:15,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:38:15,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:38:15,332 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 14:38:15,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:38:15,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:38:15,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:38:15,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:38:15,658 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:38:15,659 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2020-10-13 14:38:15,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6517f7260/cb42601594874534ae28b01a9ae3a8a1/FLAG076895059 [2020-10-13 14:38:16,316 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:38:16,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2020-10-13 14:38:16,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6517f7260/cb42601594874534ae28b01a9ae3a8a1/FLAG076895059 [2020-10-13 14:38:16,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6517f7260/cb42601594874534ae28b01a9ae3a8a1 [2020-10-13 14:38:16,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:38:16,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:38:16,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:38:16,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:38:16,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:38:16,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:38:16" (1/1) ... [2020-10-13 14:38:16,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe29230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:16, skipping insertion in model container [2020-10-13 14:38:16,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:38:16" (1/1) ... [2020-10-13 14:38:16,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:38:16,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:38:17,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:38:17,189 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:38:17,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:38:17,581 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:38:17,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17 WrapperNode [2020-10-13 14:38:17,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:38:17,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:38:17,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:38:17,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:38:17,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (1/1) ... [2020-10-13 14:38:17,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (1/1) ... [2020-10-13 14:38:17,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (1/1) ... [2020-10-13 14:38:17,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (1/1) ... [2020-10-13 14:38:17,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (1/1) ... [2020-10-13 14:38:17,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (1/1) ... [2020-10-13 14:38:17,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (1/1) ... [2020-10-13 14:38:17,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:38:17,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:38:17,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:38:17,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:38:17,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (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 14:38:17,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:38:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:38:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:38:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:38:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:38:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:38:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:38:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:38:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:38:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:38:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:38:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:38:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:38:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:38:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:38:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:38:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:38:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:38:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:38:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:38:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:38:19,094 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:38:19,095 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:38:19,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:38:19 BoogieIcfgContainer [2020-10-13 14:38:19,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:38:19,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:38:19,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:38:19,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:38:19,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:38:16" (1/3) ... [2020-10-13 14:38:19,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755ea8fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:38:19, skipping insertion in model container [2020-10-13 14:38:19,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:38:17" (2/3) ... [2020-10-13 14:38:19,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755ea8fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:38:19, skipping insertion in model container [2020-10-13 14:38:19,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:38:19" (3/3) ... [2020-10-13 14:38:19,111 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2020-10-13 14:38:19,121 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:38:19,129 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:38:19,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:38:19,174 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:38:19,175 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:38:19,175 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:38:19,175 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:38:19,175 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:38:19,175 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:38:19,175 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:38:19,175 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:38:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states. [2020-10-13 14:38:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 14:38:19,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:19,222 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] [2020-10-13 14:38:19,223 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:19,230 INFO L82 PathProgramCache]: Analyzing trace with hash -941519177, now seen corresponding path program 1 times [2020-10-13 14:38:19,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:19,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793913515] [2020-10-13 14:38:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:19,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:19,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:20,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:20,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:20,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:20,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:20,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:20,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:20,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:21,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:24,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:24,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:24,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 14:38:24,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:38:24,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 14:38:24,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:24,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:38:24,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 14:38:24,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:38:24,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:38:24,931 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:38:24,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:24,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:24,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:24,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:24,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:24,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:38:24,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:24,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:24,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:38:24,983 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 14:38:24,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793913515] [2020-10-13 14:38:24,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:24,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:38:24,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779321673] [2020-10-13 14:38:24,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:38:24,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:25,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:38:25,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:38:25,009 INFO L87 Difference]: Start difference. First operand 429 states. Second operand 5 states. [2020-10-13 14:38:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:26,878 INFO L93 Difference]: Finished difference Result 674 states and 1090 transitions. [2020-10-13 14:38:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:38:26,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-10-13 14:38:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:26,897 INFO L225 Difference]: With dead ends: 674 [2020-10-13 14:38:26,898 INFO L226 Difference]: Without dead ends: 425 [2020-10-13 14:38:26,903 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 14:38:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-13 14:38:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2020-10-13 14:38:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-13 14:38:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 682 transitions. [2020-10-13 14:38:26,985 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 682 transitions. Word has length 111 [2020-10-13 14:38:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:26,987 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 682 transitions. [2020-10-13 14:38:26,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:38:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 682 transitions. [2020-10-13 14:38:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 14:38:26,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:26,998 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] [2020-10-13 14:38:26,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:38:26,998 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:26,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1439427605, now seen corresponding path program 1 times [2020-10-13 14:38:27,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:27,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578486741] [2020-10-13 14:38:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:27,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:27,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:29,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:32,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:32,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 14:38:32,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:38:32,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 14:38:32,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:38:32,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:38:32,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:38:32,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 14:38:32,377 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:38:32,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:32,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:32,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:32,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:32,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:32,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 14:38:32,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:32,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:32,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:32,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:32,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:38:32,529 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 14:38:32,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578486741] [2020-10-13 14:38:32,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:32,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:38:32,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252442476] [2020-10-13 14:38:32,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:38:32,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:32,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:38:32,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:38:32,532 INFO L87 Difference]: Start difference. First operand 425 states and 682 transitions. Second operand 5 states. [2020-10-13 14:38:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:34,592 INFO L93 Difference]: Finished difference Result 820 states and 1310 transitions. [2020-10-13 14:38:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:38:34,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-13 14:38:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:34,597 INFO L225 Difference]: With dead ends: 820 [2020-10-13 14:38:34,597 INFO L226 Difference]: Without dead ends: 425 [2020-10-13 14:38:34,601 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 14:38:34,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-13 14:38:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2020-10-13 14:38:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-13 14:38:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 658 transitions. [2020-10-13 14:38:34,625 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 658 transitions. Word has length 112 [2020-10-13 14:38:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:34,626 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 658 transitions. [2020-10-13 14:38:34,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:38:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 658 transitions. [2020-10-13 14:38:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 14:38:34,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:34,628 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] [2020-10-13 14:38:34,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:38:34,629 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1701198998, now seen corresponding path program 1 times [2020-10-13 14:38:34,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:34,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223702953] [2020-10-13 14:38:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:34,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:34,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:34,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:34,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:35,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:35,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:35,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:36,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:38,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:38,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:39,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:39,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 14:38:39,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:38:39,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 14:38:39,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:38:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 14:38:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:38:39,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:38:39,898 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:38:39,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:39,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:39,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:39,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:39,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:39,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:38:39,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:39,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:39,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:39,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:39,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:39,936 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 14:38:39,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223702953] [2020-10-13 14:38:39,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:39,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:38:39,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275555879] [2020-10-13 14:38:39,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:38:39,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:38:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:38:39,941 INFO L87 Difference]: Start difference. First operand 425 states and 658 transitions. Second operand 5 states. [2020-10-13 14:38:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:41,370 INFO L93 Difference]: Finished difference Result 742 states and 1161 transitions. [2020-10-13 14:38:41,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:38:41,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-10-13 14:38:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:41,375 INFO L225 Difference]: With dead ends: 742 [2020-10-13 14:38:41,375 INFO L226 Difference]: Without dead ends: 425 [2020-10-13 14:38:41,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:38:41,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-10-13 14:38:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2020-10-13 14:38:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-13 14:38:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 656 transitions. [2020-10-13 14:38:41,410 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 656 transitions. Word has length 135 [2020-10-13 14:38:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:41,412 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 656 transitions. [2020-10-13 14:38:41,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:38:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 656 transitions. [2020-10-13 14:38:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 14:38:41,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:41,415 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] [2020-10-13 14:38:41,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:38:41,416 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 789174110, now seen corresponding path program 1 times [2020-10-13 14:38:41,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:41,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348527649] [2020-10-13 14:38:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:41,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:41,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:41,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:41,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:41,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:41,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:42,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:42,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:43,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:46,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 14:38:46,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:38:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:38:46,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:38:46,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 14:38:46,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:38:46,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:46,706 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:38:46,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:46,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:46,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:46,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:46,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:38:46,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:46,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:46,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:38:46,780 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 14:38:46,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348527649] [2020-10-13 14:38:46,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:46,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:38:46,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994094453] [2020-10-13 14:38:46,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:38:46,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:38:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:38:46,784 INFO L87 Difference]: Start difference. First operand 425 states and 656 transitions. Second operand 4 states. [2020-10-13 14:38:46,967 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-13 14:38:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:48,511 INFO L93 Difference]: Finished difference Result 974 states and 1522 transitions. [2020-10-13 14:38:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:38:48,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-10-13 14:38:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:48,517 INFO L225 Difference]: With dead ends: 974 [2020-10-13 14:38:48,517 INFO L226 Difference]: Without dead ends: 726 [2020-10-13 14:38:48,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:38:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-10-13 14:38:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 680. [2020-10-13 14:38:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-10-13 14:38:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1055 transitions. [2020-10-13 14:38:48,545 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1055 transitions. Word has length 136 [2020-10-13 14:38:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:48,546 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 1055 transitions. [2020-10-13 14:38:48,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:38:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1055 transitions. [2020-10-13 14:38:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 14:38:48,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:48,549 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] [2020-10-13 14:38:48,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:38:48,549 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:48,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:48,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1247403290, now seen corresponding path program 1 times [2020-10-13 14:38:48,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:48,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922545070] [2020-10-13 14:38:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:48,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:48,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:48,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:48,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:48,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:48,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:48,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:48,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:49,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:51,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:51,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:52,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:52,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:52,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:53,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:53,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 14:38:53,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 14:38:53,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:38:53,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:38:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 14:38:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:38:53,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:38:53,789 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:38:53,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:38:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:53,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:53,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:38:53,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:38:53,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:38:53,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:38:53,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:38:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:38:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:38:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:38:53,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:38:53,846 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 14:38:53,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922545070] [2020-10-13 14:38:53,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:38:53,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:38:53,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960805990] [2020-10-13 14:38:53,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:38:53,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:38:53,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:38:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:38:53,849 INFO L87 Difference]: Start difference. First operand 680 states and 1055 transitions. Second operand 5 states. [2020-10-13 14:38:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:38:55,615 INFO L93 Difference]: Finished difference Result 968 states and 1510 transitions. [2020-10-13 14:38:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:38:55,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2020-10-13 14:38:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:38:55,622 INFO L225 Difference]: With dead ends: 968 [2020-10-13 14:38:55,622 INFO L226 Difference]: Without dead ends: 680 [2020-10-13 14:38:55,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:38:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2020-10-13 14:38:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 680. [2020-10-13 14:38:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-10-13 14:38:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1051 transitions. [2020-10-13 14:38:55,650 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1051 transitions. Word has length 138 [2020-10-13 14:38:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:38:55,650 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 1051 transitions. [2020-10-13 14:38:55,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:38:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1051 transitions. [2020-10-13 14:38:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 14:38:55,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:38:55,653 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] [2020-10-13 14:38:55,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:38:55,654 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:38:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:38:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2027605998, now seen corresponding path program 1 times [2020-10-13 14:38:55,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:38:55,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797685669] [2020-10-13 14:38:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:38:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:38:55,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:55,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:56,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:38:58,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:00,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:00,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 14:39:00,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:39:00,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 14:39:00,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:00,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:00,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 14:39:00,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 14:39:00,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:00,898 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:00,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:00,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:00,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:00,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:00,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:00,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:39:00,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:00,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:00,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:00,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:00,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:39:00,944 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 14:39:00,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797685669] [2020-10-13 14:39:00,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:00,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:00,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845287747] [2020-10-13 14:39:00,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:00,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:00,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:00,948 INFO L87 Difference]: Start difference. First operand 680 states and 1051 transitions. Second operand 4 states. [2020-10-13 14:39:01,103 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-13 14:39:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:02,922 INFO L93 Difference]: Finished difference Result 1808 states and 2818 transitions. [2020-10-13 14:39:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:02,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-10-13 14:39:02,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:02,931 INFO L225 Difference]: With dead ends: 1808 [2020-10-13 14:39:02,931 INFO L226 Difference]: Without dead ends: 1270 [2020-10-13 14:39:02,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2020-10-13 14:39:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1180. [2020-10-13 14:39:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2020-10-13 14:39:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1824 transitions. [2020-10-13 14:39:02,994 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1824 transitions. Word has length 139 [2020-10-13 14:39:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:02,995 INFO L479 AbstractCegarLoop]: Abstraction has 1180 states and 1824 transitions. [2020-10-13 14:39:02,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1824 transitions. [2020-10-13 14:39:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 14:39:02,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:02,999 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] [2020-10-13 14:39:02,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:39:03,000 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:03,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:03,000 INFO L82 PathProgramCache]: Analyzing trace with hash -274122158, now seen corresponding path program 1 times [2020-10-13 14:39:03,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:03,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280691496] [2020-10-13 14:39:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:03,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:03,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:03,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:03,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:03,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:03,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:03,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:04,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:08,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:08,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 14:39:08,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:39:08,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:39:08,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 14:39:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:39:08,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:08,201 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:08,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:08,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:08,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:08,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:08,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:39:08,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:08,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:08,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:08,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:08,249 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 14:39:08,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280691496] [2020-10-13 14:39:08,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:08,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:08,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36788382] [2020-10-13 14:39:08,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:08,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:08,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:08,251 INFO L87 Difference]: Start difference. First operand 1180 states and 1824 transitions. Second operand 4 states. [2020-10-13 14:39:08,427 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-13 14:39:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:10,395 INFO L93 Difference]: Finished difference Result 2992 states and 4630 transitions. [2020-10-13 14:39:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:10,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-10-13 14:39:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:10,415 INFO L225 Difference]: With dead ends: 2992 [2020-10-13 14:39:10,416 INFO L226 Difference]: Without dead ends: 2158 [2020-10-13 14:39:10,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2020-10-13 14:39:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1980. [2020-10-13 14:39:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1980 states. [2020-10-13 14:39:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3038 transitions. [2020-10-13 14:39:10,557 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3038 transitions. Word has length 141 [2020-10-13 14:39:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:10,557 INFO L479 AbstractCegarLoop]: Abstraction has 1980 states and 3038 transitions. [2020-10-13 14:39:10,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3038 transitions. [2020-10-13 14:39:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 14:39:10,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:10,566 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] [2020-10-13 14:39:10,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:39:10,567 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2122520790, now seen corresponding path program 1 times [2020-10-13 14:39:10,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:10,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58934131] [2020-10-13 14:39:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:10,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:10,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:10,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:10,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:10,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:11,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:12,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:12,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:12,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:12,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:12,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:15,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:15,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 14:39:15,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:39:15,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:39:15,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:39:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 124 [2020-10-13 14:39:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:39:15,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:15,799 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:15,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:15,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:15,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:15,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:15,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:15,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:39:15,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:15,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:15,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:15,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:15,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:15,834 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 14:39:15,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58934131] [2020-10-13 14:39:15,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:15,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:39:15,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815181279] [2020-10-13 14:39:15,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:39:15,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:15,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:39:15,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:15,837 INFO L87 Difference]: Start difference. First operand 1980 states and 3038 transitions. Second operand 5 states. [2020-10-13 14:39:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:17,440 INFO L93 Difference]: Finished difference Result 2438 states and 3747 transitions. [2020-10-13 14:39:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:17,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-13 14:39:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:17,451 INFO L225 Difference]: With dead ends: 2438 [2020-10-13 14:39:17,451 INFO L226 Difference]: Without dead ends: 1980 [2020-10-13 14:39:17,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:39:17,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2020-10-13 14:39:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1980. [2020-10-13 14:39:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1980 states. [2020-10-13 14:39:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3022 transitions. [2020-10-13 14:39:17,536 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3022 transitions. Word has length 143 [2020-10-13 14:39:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:17,536 INFO L479 AbstractCegarLoop]: Abstraction has 1980 states and 3022 transitions. [2020-10-13 14:39:17,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:39:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3022 transitions. [2020-10-13 14:39:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 14:39:17,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:17,543 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] [2020-10-13 14:39:17,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:39:17,544 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:17,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1817265070, now seen corresponding path program 1 times [2020-10-13 14:39:17,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:17,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859964856] [2020-10-13 14:39:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:17,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:17,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:17,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:17,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:17,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:17,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:18,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:22,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:22,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 14:39:22,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:39:22,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:39:22,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:22,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:22,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-13 14:39:22,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:39:22,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:22,750 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:22,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:22,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:22,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:22,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:22,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:22,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:39:22,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:22,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:22,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:22,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:22,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:22,783 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 14:39:22,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859964856] [2020-10-13 14:39:22,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:22,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:22,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963745424] [2020-10-13 14:39:22,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:22,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:22,785 INFO L87 Difference]: Start difference. First operand 1980 states and 3022 transitions. Second operand 4 states. [2020-10-13 14:39:22,943 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-13 14:39:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:24,957 INFO L93 Difference]: Finished difference Result 5268 states and 8026 transitions. [2020-10-13 14:39:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:24,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-10-13 14:39:24,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:24,975 INFO L225 Difference]: With dead ends: 5268 [2020-10-13 14:39:24,976 INFO L226 Difference]: Without dead ends: 3714 [2020-10-13 14:39:24,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2020-10-13 14:39:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3360. [2020-10-13 14:39:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2020-10-13 14:39:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 5060 transitions. [2020-10-13 14:39:25,116 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 5060 transitions. Word has length 144 [2020-10-13 14:39:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:25,116 INFO L479 AbstractCegarLoop]: Abstraction has 3360 states and 5060 transitions. [2020-10-13 14:39:25,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 5060 transitions. [2020-10-13 14:39:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 14:39:25,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:25,129 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] [2020-10-13 14:39:25,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:39:25,130 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2034812700, now seen corresponding path program 1 times [2020-10-13 14:39:25,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:25,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530557593] [2020-10-13 14:39:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:25,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:25,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:25,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:25,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:25,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:26,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:30,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:30,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 14:39:30,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 14:39:30,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:39:30,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:39:30,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:39:30,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:30,312 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:30,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:30,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:30,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:30,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:30,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:30,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:39:30,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:30,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:30,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:30,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:30,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:30,344 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 14:39:30,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530557593] [2020-10-13 14:39:30,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:30,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:30,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324178425] [2020-10-13 14:39:30,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:30,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:30,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:30,346 INFO L87 Difference]: Start difference. First operand 3360 states and 5060 transitions. Second operand 4 states. [2020-10-13 14:39:30,510 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:39:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:32,384 INFO L93 Difference]: Finished difference Result 5788 states and 8738 transitions. [2020-10-13 14:39:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:32,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-10-13 14:39:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:32,397 INFO L225 Difference]: With dead ends: 5788 [2020-10-13 14:39:32,397 INFO L226 Difference]: Without dead ends: 3100 [2020-10-13 14:39:32,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2020-10-13 14:39:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 3098. [2020-10-13 14:39:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3098 states. [2020-10-13 14:39:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 4670 transitions. [2020-10-13 14:39:32,527 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 4670 transitions. Word has length 146 [2020-10-13 14:39:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:32,528 INFO L479 AbstractCegarLoop]: Abstraction has 3098 states and 4670 transitions. [2020-10-13 14:39:32,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 4670 transitions. [2020-10-13 14:39:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 14:39:32,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:32,537 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] [2020-10-13 14:39:32,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:39:32,537 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash -670123523, now seen corresponding path program 1 times [2020-10-13 14:39:32,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:32,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089649786] [2020-10-13 14:39:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:32,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:32,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:33,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:33,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:34,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:35,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:35,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:35,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:37,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:37,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 14:39:37,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-13 14:39:37,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:39:37,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:37,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:37,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-13 14:39:37,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:39:37,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:37,737 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:37,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:37,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:37,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:37,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:37,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:37,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:39:37,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:37,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:37,766 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 14:39:37,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089649786] [2020-10-13 14:39:37,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:37,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:37,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774841332] [2020-10-13 14:39:37,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:37,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:37,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:37,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:37,768 INFO L87 Difference]: Start difference. First operand 3098 states and 4670 transitions. Second operand 4 states. [2020-10-13 14:39:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:39,280 INFO L93 Difference]: Finished difference Result 4494 states and 6804 transitions. [2020-10-13 14:39:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:39:39,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-10-13 14:39:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:39,288 INFO L225 Difference]: With dead ends: 4494 [2020-10-13 14:39:39,288 INFO L226 Difference]: Without dead ends: 2068 [2020-10-13 14:39:39,293 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 14:39:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2020-10-13 14:39:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 2066. [2020-10-13 14:39:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2066 states. [2020-10-13 14:39:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 3102 transitions. [2020-10-13 14:39:39,376 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 3102 transitions. Word has length 147 [2020-10-13 14:39:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:39,377 INFO L479 AbstractCegarLoop]: Abstraction has 2066 states and 3102 transitions. [2020-10-13 14:39:39,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 3102 transitions. [2020-10-13 14:39:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 14:39:39,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:39,382 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] [2020-10-13 14:39:39,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:39:39,383 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:39,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1170262069, now seen corresponding path program 1 times [2020-10-13 14:39:39,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:39,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25902842] [2020-10-13 14:39:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:39,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:39,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:39,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:39,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:41,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:41,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:41,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:41,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:44,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 14:39:44,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-13 14:39:44,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:39:44,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:44,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:44,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:39:44,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:39:44,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:44,563 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:44,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:44,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:44,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:44,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:44,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:44,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:39:44,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:44,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:44,588 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 14:39:44,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25902842] [2020-10-13 14:39:44,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:44,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:44,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626150237] [2020-10-13 14:39:44,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:44,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:44,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:44,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:44,590 INFO L87 Difference]: Start difference. First operand 2066 states and 3102 transitions. Second operand 4 states. [2020-10-13 14:39:44,742 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:39:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:46,169 INFO L93 Difference]: Finished difference Result 3726 states and 5616 transitions. [2020-10-13 14:39:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:46,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-10-13 14:39:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:46,183 INFO L225 Difference]: With dead ends: 3726 [2020-10-13 14:39:46,183 INFO L226 Difference]: Without dead ends: 1964 [2020-10-13 14:39:46,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2020-10-13 14:39:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1962. [2020-10-13 14:39:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1962 states. [2020-10-13 14:39:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2950 transitions. [2020-10-13 14:39:46,278 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2950 transitions. Word has length 147 [2020-10-13 14:39:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:46,278 INFO L479 AbstractCegarLoop]: Abstraction has 1962 states and 2950 transitions. [2020-10-13 14:39:46,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2950 transitions. [2020-10-13 14:39:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 14:39:46,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:46,284 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] [2020-10-13 14:39:46,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:39:46,284 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:46,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1948372851, now seen corresponding path program 1 times [2020-10-13 14:39:46,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:46,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649996090] [2020-10-13 14:39:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:46,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:46,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:46,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:46,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:46,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:46,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:46,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:46,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:47,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:48,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:48,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:48,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:51,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:51,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 14:39:51,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 39 [2020-10-13 14:39:51,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:39:51,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:51,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:51,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:39:51,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:39:51,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:51,472 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:51,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:51,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:51,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:51,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:51,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:51,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:39:51,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:51,500 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 14:39:51,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649996090] [2020-10-13 14:39:51,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:51,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:51,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392646395] [2020-10-13 14:39:51,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:51,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:51,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:51,502 INFO L87 Difference]: Start difference. First operand 1962 states and 2950 transitions. Second operand 4 states. [2020-10-13 14:39:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:52,782 INFO L93 Difference]: Finished difference Result 2702 states and 4072 transitions. [2020-10-13 14:39:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:39:52,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-10-13 14:39:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:52,787 INFO L225 Difference]: With dead ends: 2702 [2020-10-13 14:39:52,787 INFO L226 Difference]: Without dead ends: 1044 [2020-10-13 14:39:52,791 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 14:39:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2020-10-13 14:39:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1042. [2020-10-13 14:39:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1042 states. [2020-10-13 14:39:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1546 transitions. [2020-10-13 14:39:52,834 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1546 transitions. Word has length 148 [2020-10-13 14:39:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:52,835 INFO L479 AbstractCegarLoop]: Abstraction has 1042 states and 1546 transitions. [2020-10-13 14:39:52,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1546 transitions. [2020-10-13 14:39:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 14:39:52,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:52,838 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] [2020-10-13 14:39:52,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:39:52,838 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash 772249401, now seen corresponding path program 1 times [2020-10-13 14:39:52,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:52,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720340800] [2020-10-13 14:39:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:52,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:52,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:52,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:52,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:52,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:53,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:54,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:54,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:54,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:54,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:54,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:54,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:54,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:55,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:56,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:56,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:56,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:57,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:57,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:57,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 14:39:57,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 38 [2020-10-13 14:39:57,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 14:39:57,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:57,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:39:57,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:39:57,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:39:57,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:58,012 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:39:58,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:39:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:58,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:39:58,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:39:58,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:39:58,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:39:58,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:39:58,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:39:58,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:39:58,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:39:58,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:39:58,038 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 14:39:58,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720340800] [2020-10-13 14:39:58,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:39:58,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:39:58,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237496489] [2020-10-13 14:39:58,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:39:58,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:39:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:39:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:39:58,040 INFO L87 Difference]: Start difference. First operand 1042 states and 1546 transitions. Second operand 4 states. [2020-10-13 14:39:58,199 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:39:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:39:59,561 INFO L93 Difference]: Finished difference Result 1748 states and 2605 transitions. [2020-10-13 14:39:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:39:59,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-10-13 14:39:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:39:59,566 INFO L225 Difference]: With dead ends: 1748 [2020-10-13 14:39:59,566 INFO L226 Difference]: Without dead ends: 970 [2020-10-13 14:39:59,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:39:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-10-13 14:39:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-10-13 14:39:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-10-13 14:39:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1433 transitions. [2020-10-13 14:39:59,615 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1433 transitions. Word has length 148 [2020-10-13 14:39:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:39:59,616 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1433 transitions. [2020-10-13 14:39:59,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:39:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1433 transitions. [2020-10-13 14:39:59,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 14:39:59,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:39:59,619 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] [2020-10-13 14:39:59,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:39:59,620 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:39:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:39:59,620 INFO L82 PathProgramCache]: Analyzing trace with hash 147757012, now seen corresponding path program 1 times [2020-10-13 14:39:59,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:39:59,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064858851] [2020-10-13 14:39:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:39:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:39:59,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:59,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:59,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:59,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:39:59,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:00,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:01,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:02,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:04,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:04,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:04,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:04,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:04,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:04,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:04,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 14:40:04,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 53 [2020-10-13 14:40:04,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:40:04,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:04,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 14:40:04,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:40:04,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:04,829 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:04,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:04,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:04,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:04,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:04,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:04,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:40:04,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:04,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:04,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:04,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:04,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:04,881 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 14:40:04,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064858851] [2020-10-13 14:40:04,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:04,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:04,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627710182] [2020-10-13 14:40:04,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:04,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:04,883 INFO L87 Difference]: Start difference. First operand 968 states and 1433 transitions. Second operand 4 states. [2020-10-13 14:40:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:06,124 INFO L93 Difference]: Finished difference Result 1268 states and 1884 transitions. [2020-10-13 14:40:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:40:06,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-10-13 14:40:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:06,128 INFO L225 Difference]: With dead ends: 1268 [2020-10-13 14:40:06,129 INFO L226 Difference]: Without dead ends: 564 [2020-10-13 14:40:06,130 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 14:40:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-13 14:40:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 562. [2020-10-13 14:40:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-10-13 14:40:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 819 transitions. [2020-10-13 14:40:06,158 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 819 transitions. Word has length 149 [2020-10-13 14:40:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:06,158 INFO L479 AbstractCegarLoop]: Abstraction has 562 states and 819 transitions. [2020-10-13 14:40:06,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 819 transitions. [2020-10-13 14:40:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 14:40:06,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:06,161 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] [2020-10-13 14:40:06,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:40:06,162 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1720955712, now seen corresponding path program 1 times [2020-10-13 14:40:06,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:06,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634620269] [2020-10-13 14:40:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:07,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:08,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:09,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:10,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:11,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:11,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:11,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 14:40:11,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 60 [2020-10-13 14:40:11,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 14:40:11,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:11,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:40:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:40:11,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:11,345 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:11,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:11,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:11,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:11,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:11,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:40:11,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:11,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:40:11,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634620269] [2020-10-13 14:40:11,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:11,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:11,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153125331] [2020-10-13 14:40:11,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:11,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:11,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:11,373 INFO L87 Difference]: Start difference. First operand 562 states and 819 transitions. Second operand 4 states. [2020-10-13 14:40:11,534 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:40:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:12,714 INFO L93 Difference]: Finished difference Result 934 states and 1372 transitions. [2020-10-13 14:40:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:12,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-10-13 14:40:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:12,718 INFO L225 Difference]: With dead ends: 934 [2020-10-13 14:40:12,718 INFO L226 Difference]: Without dead ends: 524 [2020-10-13 14:40:12,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-13 14:40:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2020-10-13 14:40:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-13 14:40:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 759 transitions. [2020-10-13 14:40:12,744 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 759 transitions. Word has length 149 [2020-10-13 14:40:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:12,745 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 759 transitions. [2020-10-13 14:40:12,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 759 transitions. [2020-10-13 14:40:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 14:40:12,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:12,747 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] [2020-10-13 14:40:12,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:40:12,747 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1329553400, now seen corresponding path program 1 times [2020-10-13 14:40:12,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:12,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186036263] [2020-10-13 14:40:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:12,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:12,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:12,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:12,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:13,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:15,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:16,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:17,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 14:40:17,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 76 [2020-10-13 14:40:17,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:40:17,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 14:40:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:40:17,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:17,935 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:17,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:17,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:17,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:17,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:17,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:17,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:40:17,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:17,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:17,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:17,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:17,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:17,962 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 14:40:17,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186036263] [2020-10-13 14:40:17,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:17,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:17,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333080342] [2020-10-13 14:40:17,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:17,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:17,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:17,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:17,964 INFO L87 Difference]: Start difference. First operand 522 states and 759 transitions. Second operand 4 states. [2020-10-13 14:40:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:18,966 INFO L93 Difference]: Finished difference Result 684 states and 999 transitions. [2020-10-13 14:40:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:40:18,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-10-13 14:40:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:18,969 INFO L225 Difference]: With dead ends: 684 [2020-10-13 14:40:18,969 INFO L226 Difference]: Without dead ends: 314 [2020-10-13 14:40:18,970 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 14:40:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-13 14:40:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-10-13 14:40:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-13 14:40:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 443 transitions. [2020-10-13 14:40:18,982 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 443 transitions. Word has length 150 [2020-10-13 14:40:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:18,982 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 443 transitions. [2020-10-13 14:40:18,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 443 transitions. [2020-10-13 14:40:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 14:40:18,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:18,984 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] [2020-10-13 14:40:18,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:40:18,985 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:18,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1043928658, now seen corresponding path program 1 times [2020-10-13 14:40:18,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:18,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905005125] [2020-10-13 14:40:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:19,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:20,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:21,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:24,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:24,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 14:40:24,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 73 [2020-10-13 14:40:24,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:40:24,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-13 14:40:24,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:40:24,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:24,164 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:24,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:24,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:24,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:24,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:24,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:24,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:40:24,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:24,201 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 14:40:24,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905005125] [2020-10-13 14:40:24,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:24,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:24,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227527462] [2020-10-13 14:40:24,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:24,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:24,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:24,204 INFO L87 Difference]: Start difference. First operand 312 states and 443 transitions. Second operand 4 states. [2020-10-13 14:40:24,373 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-13 14:40:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:25,371 INFO L93 Difference]: Finished difference Result 548 states and 793 transitions. [2020-10-13 14:40:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:25,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2020-10-13 14:40:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:25,373 INFO L225 Difference]: With dead ends: 548 [2020-10-13 14:40:25,373 INFO L226 Difference]: Without dead ends: 452 [2020-10-13 14:40:25,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-13 14:40:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 402. [2020-10-13 14:40:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-13 14:40:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 575 transitions. [2020-10-13 14:40:25,395 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 575 transitions. Word has length 150 [2020-10-13 14:40:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:25,395 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 575 transitions. [2020-10-13 14:40:25,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 575 transitions. [2020-10-13 14:40:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 14:40:25,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:25,397 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] [2020-10-13 14:40:25,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:40:25,397 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2016482404, now seen corresponding path program 1 times [2020-10-13 14:40:25,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:25,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417294766] [2020-10-13 14:40:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:25,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:25,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:25,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:25,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:25,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:25,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:26,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:26,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:26,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:26,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:26,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:26,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:26,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:27,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:28,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:29,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:30,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 14:40:30,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 57 [2020-10-13 14:40:30,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:40:30,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:40:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-13 14:40:30,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:40:30,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:30,590 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:30,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:30,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:30,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:30,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:30,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:30,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:40:30,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:30,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:30,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:30,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:30,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:30,615 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 14:40:30,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417294766] [2020-10-13 14:40:30,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:30,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:40:30,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578460461] [2020-10-13 14:40:30,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:40:30,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:30,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:40:30,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:30,617 INFO L87 Difference]: Start difference. First operand 402 states and 575 transitions. Second operand 5 states. [2020-10-13 14:40:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:31,821 INFO L93 Difference]: Finished difference Result 527 states and 758 transitions. [2020-10-13 14:40:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:40:31,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-13 14:40:31,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:31,825 INFO L225 Difference]: With dead ends: 527 [2020-10-13 14:40:31,826 INFO L226 Difference]: Without dead ends: 525 [2020-10-13 14:40:31,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:40:31,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-13 14:40:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 406. [2020-10-13 14:40:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-13 14:40:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 579 transitions. [2020-10-13 14:40:31,858 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 579 transitions. Word has length 151 [2020-10-13 14:40:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:31,859 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 579 transitions. [2020-10-13 14:40:31,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:40:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 579 transitions. [2020-10-13 14:40:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 14:40:31,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:31,860 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] [2020-10-13 14:40:31,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 14:40:31,861 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1923174977, now seen corresponding path program 1 times [2020-10-13 14:40:31,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:31,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428902269] [2020-10-13 14:40:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:31,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:31,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:32,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:33,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:34,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:35,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:36,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:36,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:36,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 14:40:36,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 38 [2020-10-13 14:40:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:40:36,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-13 14:40:36,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:40:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:37,040 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:37,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:37,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:37,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:37,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:37,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:37,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:40:37,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:37,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:37,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:37,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:37,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:37,066 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 14:40:37,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428902269] [2020-10-13 14:40:37,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:37,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:37,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276895332] [2020-10-13 14:40:37,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:37,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:37,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:37,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:37,067 INFO L87 Difference]: Start difference. First operand 406 states and 579 transitions. Second operand 4 states. [2020-10-13 14:40:37,221 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-13 14:40:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:38,204 INFO L93 Difference]: Finished difference Result 850 states and 1221 transitions. [2020-10-13 14:40:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:40:38,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-10-13 14:40:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:38,208 INFO L225 Difference]: With dead ends: 850 [2020-10-13 14:40:38,208 INFO L226 Difference]: Without dead ends: 531 [2020-10-13 14:40:38,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:40:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2020-10-13 14:40:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 522. [2020-10-13 14:40:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-13 14:40:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 742 transitions. [2020-10-13 14:40:38,240 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 742 transitions. Word has length 152 [2020-10-13 14:40:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:38,240 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 742 transitions. [2020-10-13 14:40:38,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 742 transitions. [2020-10-13 14:40:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 14:40:38,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:38,242 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] [2020-10-13 14:40:38,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 14:40:38,242 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:38,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1232633757, now seen corresponding path program 1 times [2020-10-13 14:40:38,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:38,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297691012] [2020-10-13 14:40:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:38,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:38,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:43,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:43,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 14:40:43,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:40:43,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:40:43,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:43,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:40:43,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:40:43,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:40:43,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:43,449 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:43,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:43,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:43,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:43,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:43,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:43,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:40:43,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:43,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:43,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:43,494 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 14:40:43,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297691012] [2020-10-13 14:40:43,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:43,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:40:43,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123192678] [2020-10-13 14:40:43,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:40:43,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:43,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:40:43,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:40:43,496 INFO L87 Difference]: Start difference. First operand 522 states and 742 transitions. Second operand 7 states. [2020-10-13 14:40:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:46,321 INFO L93 Difference]: Finished difference Result 2064 states and 2924 transitions. [2020-10-13 14:40:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:40:46,322 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2020-10-13 14:40:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:46,329 INFO L225 Difference]: With dead ends: 2064 [2020-10-13 14:40:46,329 INFO L226 Difference]: Without dead ends: 1620 [2020-10-13 14:40:46,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:40:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2020-10-13 14:40:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1614. [2020-10-13 14:40:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-10-13 14:40:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2268 transitions. [2020-10-13 14:40:46,411 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2268 transitions. Word has length 153 [2020-10-13 14:40:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:46,411 INFO L479 AbstractCegarLoop]: Abstraction has 1614 states and 2268 transitions. [2020-10-13 14:40:46,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:40:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2268 transitions. [2020-10-13 14:40:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 14:40:46,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:46,414 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] [2020-10-13 14:40:46,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 14:40:46,414 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1151802344, now seen corresponding path program 1 times [2020-10-13 14:40:46,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:46,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753308869] [2020-10-13 14:40:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:46,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:46,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:46,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:46,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:46,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:48,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:48,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:50,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:50,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 14:40:50,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:40:50,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4121 [2020-10-13 14:40:50,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:50,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:50,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-13 14:40:50,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:40:50,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:50,709 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:50,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:50,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:50,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:50,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:50,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:50,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:40:50,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:50,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:40:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:40:50,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:50,737 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 14:40:50,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753308869] [2020-10-13 14:40:50,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:50,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:40:50,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151584621] [2020-10-13 14:40:50,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:40:50,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:50,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:40:50,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:40:50,738 INFO L87 Difference]: Start difference. First operand 1614 states and 2268 transitions. Second operand 4 states. [2020-10-13 14:40:52,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:52,440 INFO L93 Difference]: Finished difference Result 3076 states and 4348 transitions. [2020-10-13 14:40:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:40:52,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2020-10-13 14:40:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:52,448 INFO L225 Difference]: With dead ends: 3076 [2020-10-13 14:40:52,448 INFO L226 Difference]: Without dead ends: 2246 [2020-10-13 14:40:52,450 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 14:40:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2020-10-13 14:40:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2242. [2020-10-13 14:40:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2242 states. [2020-10-13 14:40:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3152 transitions. [2020-10-13 14:40:52,594 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3152 transitions. Word has length 159 [2020-10-13 14:40:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:52,595 INFO L479 AbstractCegarLoop]: Abstraction has 2242 states and 3152 transitions. [2020-10-13 14:40:52,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:40:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3152 transitions. [2020-10-13 14:40:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 14:40:52,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:52,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:40:52,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 14:40:52,600 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1642861498, now seen corresponding path program 1 times [2020-10-13 14:40:52,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:52,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731906347] [2020-10-13 14:40:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:52,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:52,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:53,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:53,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 14:40:53,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:40:53,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-10-13 14:40:53,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:53,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:40:53,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:40:53,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 14:40:53,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:53,644 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:40:53,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:40:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:53,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:53,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:40:53,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:40:53,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:40:53,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:40:53,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:40:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:40:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:40:53,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:40:53,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:40:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:40:53,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731906347] [2020-10-13 14:40:53,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:40:53,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:40:53,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792695641] [2020-10-13 14:40:53,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:40:53,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:40:53,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:40:53,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:40:53,689 INFO L87 Difference]: Start difference. First operand 2242 states and 3152 transitions. Second operand 6 states. [2020-10-13 14:40:53,865 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:40:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:40:55,338 INFO L93 Difference]: Finished difference Result 6457 states and 9072 transitions. [2020-10-13 14:40:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:40:55,338 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2020-10-13 14:40:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:40:55,346 INFO L225 Difference]: With dead ends: 6457 [2020-10-13 14:40:55,346 INFO L226 Difference]: Without dead ends: 4255 [2020-10-13 14:40:55,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:40:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2020-10-13 14:40:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 4253. [2020-10-13 14:40:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4253 states. [2020-10-13 14:40:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 5914 transitions. [2020-10-13 14:40:55,589 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 5914 transitions. Word has length 180 [2020-10-13 14:40:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:40:55,589 INFO L479 AbstractCegarLoop]: Abstraction has 4253 states and 5914 transitions. [2020-10-13 14:40:55,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:40:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 5914 transitions. [2020-10-13 14:40:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 14:40:55,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:40:55,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:40:55,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 14:40:55,595 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:40:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:40:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1661123041, now seen corresponding path program 1 times [2020-10-13 14:40:55,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:40:55,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388259071] [2020-10-13 14:40:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:40:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:40:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:55,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:55,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:55,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:55,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:56,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:40:57,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:00,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:00,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 14:41:00,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:41:00,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 14:41:00,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:00,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:41:00,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:41:00,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 14:41:00,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:00,966 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:41:00,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:00,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:00,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:00,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:00,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:00,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:41:00,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:00,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:00,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:00,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:00,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:41:01,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388259071] [2020-10-13 14:41:01,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:01,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:41:01,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597079230] [2020-10-13 14:41:01,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:41:01,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:01,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:41:01,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:01,006 INFO L87 Difference]: Start difference. First operand 4253 states and 5914 transitions. Second operand 9 states. [2020-10-13 14:41:01,208 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-13 14:41:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:07,860 INFO L93 Difference]: Finished difference Result 25546 states and 35454 transitions. [2020-10-13 14:41:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:41:07,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 180 [2020-10-13 14:41:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:07,899 INFO L225 Difference]: With dead ends: 25546 [2020-10-13 14:41:07,900 INFO L226 Difference]: Without dead ends: 21525 [2020-10-13 14:41:07,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:41:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21525 states. [2020-10-13 14:41:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21525 to 4400. [2020-10-13 14:41:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4400 states. [2020-10-13 14:41:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 6107 transitions. [2020-10-13 14:41:08,454 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 6107 transitions. Word has length 180 [2020-10-13 14:41:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:08,454 INFO L479 AbstractCegarLoop]: Abstraction has 4400 states and 6107 transitions. [2020-10-13 14:41:08,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:41:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 6107 transitions. [2020-10-13 14:41:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 14:41:08,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:08,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:08,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 14:41:08,461 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:08,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1501340673, now seen corresponding path program 1 times [2020-10-13 14:41:08,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:08,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167911306] [2020-10-13 14:41:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:08,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:08,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:08,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:08,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:08,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:10,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:11,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:13,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:13,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:13,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:13,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:13,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 14:41:13,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-13 14:41:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:41:13,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:41:13,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:41:13,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:41:13,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:13,666 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:41:13,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:13,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:13,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:13,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:13,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:13,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:41:13,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:41:13,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:41:13,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167911306] [2020-10-13 14:41:13,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:13,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:41:13,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499302536] [2020-10-13 14:41:13,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:41:13,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:41:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:41:13,703 INFO L87 Difference]: Start difference. First operand 4400 states and 6107 transitions. Second operand 6 states. [2020-10-13 14:41:13,879 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-13 14:41:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:15,976 INFO L93 Difference]: Finished difference Result 12584 states and 17435 transitions. [2020-10-13 14:41:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:41:15,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2020-10-13 14:41:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:15,993 INFO L225 Difference]: With dead ends: 12584 [2020-10-13 14:41:15,993 INFO L226 Difference]: Without dead ends: 8303 [2020-10-13 14:41:16,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8303 states. [2020-10-13 14:41:16,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8303 to 8301. [2020-10-13 14:41:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8301 states. [2020-10-13 14:41:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8301 states to 8301 states and 11413 transitions. [2020-10-13 14:41:16,837 INFO L78 Accepts]: Start accepts. Automaton has 8301 states and 11413 transitions. Word has length 180 [2020-10-13 14:41:16,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:16,837 INFO L479 AbstractCegarLoop]: Abstraction has 8301 states and 11413 transitions. [2020-10-13 14:41:16,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:41:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 8301 states and 11413 transitions. [2020-10-13 14:41:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 14:41:16,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:16,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:16,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 14:41:16,848 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:16,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1025387708, now seen corresponding path program 1 times [2020-10-13 14:41:16,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:16,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521839100] [2020-10-13 14:41:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:16,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:16,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:16,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:16,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:17,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:17,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:17,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:17,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:17,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:19,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:20,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:21,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:21,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 14:41:21,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-13 14:41:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 14:41:21,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 14:41:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:41:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:22,031 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:41:22,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:22,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:22,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:22,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:22,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:41:22,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:22,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:41:22,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521839100] [2020-10-13 14:41:22,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:22,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:22,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493994740] [2020-10-13 14:41:22,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:22,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:22,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:22,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:22,069 INFO L87 Difference]: Start difference. First operand 8301 states and 11413 transitions. Second operand 4 states. [2020-10-13 14:41:22,241 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 14:41:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:24,109 INFO L93 Difference]: Finished difference Result 11351 states and 15549 transitions. [2020-10-13 14:41:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:41:24,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-10-13 14:41:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:24,122 INFO L225 Difference]: With dead ends: 11351 [2020-10-13 14:41:24,122 INFO L226 Difference]: Without dead ends: 8343 [2020-10-13 14:41:24,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:41:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8343 states. [2020-10-13 14:41:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8343 to 8319. [2020-10-13 14:41:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8319 states. [2020-10-13 14:41:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 11234 transitions. [2020-10-13 14:41:24,959 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 11234 transitions. Word has length 180 [2020-10-13 14:41:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:24,959 INFO L479 AbstractCegarLoop]: Abstraction has 8319 states and 11234 transitions. [2020-10-13 14:41:24,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 11234 transitions. [2020-10-13 14:41:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 14:41:24,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:24,968 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:24,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 14:41:24,968 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash -249257567, now seen corresponding path program 1 times [2020-10-13 14:41:24,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:24,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075654245] [2020-10-13 14:41:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:25,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:25,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:25,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:25,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:25,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:25,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:26,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:26,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:26,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:27,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:27,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:27,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:30,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:30,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 14:41:30,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:41:30,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:41:30,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:30,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:41:30,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:41:30,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 14:41:30,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:30,225 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 24 [2020-10-13 14:41:30,391 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:41:30,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:30,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:30,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:30,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:30,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:41:30,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:41:30,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075654245] [2020-10-13 14:41:30,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:30,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:41:30,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245554422] [2020-10-13 14:41:30,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:41:30,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:41:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:30,435 INFO L87 Difference]: Start difference. First operand 8319 states and 11234 transitions. Second operand 9 states. [2020-10-13 14:41:30,638 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-13 14:41:39,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:39,580 INFO L93 Difference]: Finished difference Result 40812 states and 55084 transitions. [2020-10-13 14:41:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:41:39,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 180 [2020-10-13 14:41:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:39,626 INFO L225 Difference]: With dead ends: 40812 [2020-10-13 14:41:39,626 INFO L226 Difference]: Without dead ends: 36610 [2020-10-13 14:41:39,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:41:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36610 states. [2020-10-13 14:41:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36610 to 8499. [2020-10-13 14:41:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8499 states. [2020-10-13 14:41:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 11472 transitions. [2020-10-13 14:41:41,494 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 11472 transitions. Word has length 180 [2020-10-13 14:41:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:41,494 INFO L479 AbstractCegarLoop]: Abstraction has 8499 states and 11472 transitions. [2020-10-13 14:41:41,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:41:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 11472 transitions. [2020-10-13 14:41:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 14:41:41,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:41,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:41,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 14:41:41,504 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:41,504 INFO L82 PathProgramCache]: Analyzing trace with hash 701774995, now seen corresponding path program 1 times [2020-10-13 14:41:41,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:41,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695937170] [2020-10-13 14:41:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:41,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:41,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:43,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:43,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 14:41:43,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:41:43,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1951 [2020-10-13 14:41:43,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:43,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:43,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-13 14:41:43,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:41:43,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:43,629 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:41:43,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:43,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:43,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:43,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:43,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:43,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:41:43,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:43,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:41:43,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:43,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:41:43,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:41:43,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695937170] [2020-10-13 14:41:43,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:43,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:41:43,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499203199] [2020-10-13 14:41:43,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:41:43,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:43,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:41:43,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:41:43,662 INFO L87 Difference]: Start difference. First operand 8499 states and 11472 transitions. Second operand 4 states. [2020-10-13 14:41:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:46,802 INFO L93 Difference]: Finished difference Result 23207 states and 31284 transitions. [2020-10-13 14:41:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:41:46,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-10-13 14:41:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:46,818 INFO L225 Difference]: With dead ends: 23207 [2020-10-13 14:41:46,818 INFO L226 Difference]: Without dead ends: 16683 [2020-10-13 14:41:46,828 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 14:41:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16683 states. [2020-10-13 14:41:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16683 to 16511. [2020-10-13 14:41:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16511 states. [2020-10-13 14:41:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16511 states to 16511 states and 22134 transitions. [2020-10-13 14:41:48,665 INFO L78 Accepts]: Start accepts. Automaton has 16511 states and 22134 transitions. Word has length 180 [2020-10-13 14:41:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:48,665 INFO L479 AbstractCegarLoop]: Abstraction has 16511 states and 22134 transitions. [2020-10-13 14:41:48,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:41:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 16511 states and 22134 transitions. [2020-10-13 14:41:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 14:41:48,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:48,682 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:48,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 14:41:48,682 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:48,683 INFO L82 PathProgramCache]: Analyzing trace with hash -817182824, now seen corresponding path program 1 times [2020-10-13 14:41:48,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:48,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130691564] [2020-10-13 14:41:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:48,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:48,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:48,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:49,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:49,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 14:41:49,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:41:49,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-13 14:41:49,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:49,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:41:49,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:41:49,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 14:41:49,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:49,533 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:41:49,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:41:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:49,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:49,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:41:49,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:41:49,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:41:49,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:41:49,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:41:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:41:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:41:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:41:49,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:41:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:41:49,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130691564] [2020-10-13 14:41:49,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:41:49,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:41:49,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163199374] [2020-10-13 14:41:49,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:41:49,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:41:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:41:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:41:49,571 INFO L87 Difference]: Start difference. First operand 16511 states and 22134 transitions. Second operand 6 states. [2020-10-13 14:41:49,750 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-13 14:41:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:41:53,484 INFO L93 Difference]: Finished difference Result 39159 states and 52444 transitions. [2020-10-13 14:41:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:41:53,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2020-10-13 14:41:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:41:53,504 INFO L225 Difference]: With dead ends: 39159 [2020-10-13 14:41:53,505 INFO L226 Difference]: Without dead ends: 23191 [2020-10-13 14:41:53,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:41:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23191 states. [2020-10-13 14:41:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23191 to 23111. [2020-10-13 14:41:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23111 states. [2020-10-13 14:41:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23111 states to 23111 states and 30796 transitions. [2020-10-13 14:41:55,741 INFO L78 Accepts]: Start accepts. Automaton has 23111 states and 30796 transitions. Word has length 180 [2020-10-13 14:41:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:41:55,742 INFO L479 AbstractCegarLoop]: Abstraction has 23111 states and 30796 transitions. [2020-10-13 14:41:55,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:41:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 23111 states and 30796 transitions. [2020-10-13 14:41:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 14:41:55,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:41:55,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:55,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 14:41:55,757 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:41:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:41:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash 595318621, now seen corresponding path program 1 times [2020-10-13 14:41:55,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:41:55,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539427790] [2020-10-13 14:41:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:41:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:41:55,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:55,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:55,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:55,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:56,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:56,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:57,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:57,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:57,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:58,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:41:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:00,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:00,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 14:42:00,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 14:42:00,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:42:00,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:00,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:42:00,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:42:00,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 14:42:00,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:01,102 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-13 14:42:01,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:42:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:42:01,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:42:01,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:42:01,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:42:01,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:42:01,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:42:01,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:42:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:42:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:42:01,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:42:01,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:42:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:42:01,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539427790] [2020-10-13 14:42:01,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:42:01,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:42:01,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002168307] [2020-10-13 14:42:01,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:42:01,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:42:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:42:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:42:01,142 INFO L87 Difference]: Start difference. First operand 23111 states and 30796 transitions. Second operand 9 states. [2020-10-13 14:42:01,345 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 148