/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:12:34,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:12:34,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:12:34,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:12:34,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:12:34,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:12:34,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:12:34,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:12:34,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:12:34,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:12:34,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:12:34,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:12:34,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:12:34,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:12:34,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:12:34,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:12:34,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:12:34,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:12:34,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:12:34,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:12:34,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:12:34,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:12:34,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:12:34,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:12:34,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:12:34,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:12:34,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:12:34,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:12:34,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:12:34,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:12:34,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:12:34,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:12:34,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:12:34,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:12:34,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:12:34,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:12:34,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:12:34,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:12:34,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:12:34,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:12:34,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:12:34,651 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 [2020-10-14 09:12:34,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:12:34,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:12:34,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:12:34,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:12:34,686 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:12:34,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:12:34,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:12:34,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:12:34,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:12:34,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:12:34,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:12:34,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:12:34,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:12:34,689 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:12:34,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:12:34,689 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:12:34,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:12:34,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:12:34,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:12:34,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:12:34,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:12:34,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:12:34,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:12:34,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:12:34,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:12:34,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:12:34,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:12:34,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:12:34,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:12:34,692 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:12:35,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:12:35,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:12:35,016 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:12:35,018 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:12:35,018 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:12:35,019 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:12:35,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34b9a0211/274c002117b74544bf20fec0d74558da/FLAG49304dc6f [2020-10-14 09:12:35,547 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:12:35,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:12:35,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34b9a0211/274c002117b74544bf20fec0d74558da/FLAG49304dc6f [2020-10-14 09:12:35,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34b9a0211/274c002117b74544bf20fec0d74558da [2020-10-14 09:12:35,903 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:12:35,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:12:35,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:12:35,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:12:35,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:12:35,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:12:35" (1/1) ... [2020-10-14 09:12:35,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c64a1dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:35, skipping insertion in model container [2020-10-14 09:12:35,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:12:35" (1/1) ... [2020-10-14 09:12:35,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:12:35,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:12:36,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:12:36,279 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:12:36,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:12:36,469 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:12:36,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36 WrapperNode [2020-10-14 09:12:36,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:12:36,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:12:36,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:12:36,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:12:36,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (1/1) ... [2020-10-14 09:12:36,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (1/1) ... [2020-10-14 09:12:36,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (1/1) ... [2020-10-14 09:12:36,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (1/1) ... [2020-10-14 09:12:36,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (1/1) ... [2020-10-14 09:12:36,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (1/1) ... [2020-10-14 09:12:36,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (1/1) ... [2020-10-14 09:12:36,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:12:36,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:12:36,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:12:36,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:12:36,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (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 [2020-10-14 09:12:36,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:12:36,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:12:36,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:12:36,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:12:36,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:12:36,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:12:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:12:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:12:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:12:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:12:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:12:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:12:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:12:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:12:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:12:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:12:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:12:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:12:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:12:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:12:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:12:37,192 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:12:37,193 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:12:37,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:12:37 BoogieIcfgContainer [2020-10-14 09:12:37,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:12:37,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:12:37,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:12:37,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:12:37,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:12:35" (1/3) ... [2020-10-14 09:12:37,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1d92ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:12:37, skipping insertion in model container [2020-10-14 09:12:37,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:12:36" (2/3) ... [2020-10-14 09:12:37,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1d92ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:12:37, skipping insertion in model container [2020-10-14 09:12:37,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:12:37" (3/3) ... [2020-10-14 09:12:37,206 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-14 09:12:37,217 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:12:37,224 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:12:37,238 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:12:37,261 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:12:37,261 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:12:37,261 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:12:37,262 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:12:37,262 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:12:37,262 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:12:37,262 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:12:37,262 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:12:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-14 09:12:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 09:12:37,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:37,291 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] [2020-10-14 09:12:37,291 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:37,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2035014399, now seen corresponding path program 1 times [2020-10-14 09:12:37,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:37,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411050510] [2020-10-14 09:12:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:37,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:37,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:38,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:40,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:40,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 09:12:40,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:12:40,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3113 [2020-10-14 09:12:40,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:40,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:40,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:12:40,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 09:12:40,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:12:40,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 09:12:40,937 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:12:40,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:40,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:40,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:40,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:40,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:40,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:12:40,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:40,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:40,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:40,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411050510] [2020-10-14 09:12:40,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:12:40,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:12:40,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217217351] [2020-10-14 09:12:40,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:12:40,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:41,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:12:41,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:12:41,016 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2020-10-14 09:12:41,240 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:12:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:42,041 INFO L93 Difference]: Finished difference Result 267 states and 426 transitions. [2020-10-14 09:12:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:12:42,043 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-14 09:12:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:42,057 INFO L225 Difference]: With dead ends: 267 [2020-10-14 09:12:42,057 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 09:12:42,062 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 [2020-10-14 09:12:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 09:12:42,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-14 09:12:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-14 09:12:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 257 transitions. [2020-10-14 09:12:42,153 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 257 transitions. Word has length 52 [2020-10-14 09:12:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:42,154 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 257 transitions. [2020-10-14 09:12:42,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:12:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 257 transitions. [2020-10-14 09:12:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 09:12:42,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:42,158 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] [2020-10-14 09:12:42,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:12:42,158 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:42,159 INFO L82 PathProgramCache]: Analyzing trace with hash 743095595, now seen corresponding path program 1 times [2020-10-14 09:12:42,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:42,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151000248] [2020-10-14 09:12:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:42,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:42,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:43,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:43,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 09:12:43,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:12:43,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1151 [2020-10-14 09:12:43,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:43,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:12:43,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 09:12:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 09:12:43,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:43,557 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:12:43,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:43,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:43,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:43,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:43,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:12:43,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:43,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:43,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:43,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:43,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:43,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:43,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151000248] [2020-10-14 09:12:43,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:12:43,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:12:43,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951346538] [2020-10-14 09:12:43,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:12:43,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:43,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:12:43,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:12:43,588 INFO L87 Difference]: Start difference. First operand 173 states and 257 transitions. Second operand 4 states. [2020-10-14 09:12:43,746 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:12:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:44,273 INFO L93 Difference]: Finished difference Result 425 states and 657 transitions. [2020-10-14 09:12:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:12:44,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-14 09:12:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:44,277 INFO L225 Difference]: With dead ends: 425 [2020-10-14 09:12:44,280 INFO L226 Difference]: Without dead ends: 283 [2020-10-14 09:12:44,281 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 [2020-10-14 09:12:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-14 09:12:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2020-10-14 09:12:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-14 09:12:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 428 transitions. [2020-10-14 09:12:44,327 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 428 transitions. Word has length 53 [2020-10-14 09:12:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:44,327 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 428 transitions. [2020-10-14 09:12:44,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:12:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 428 transitions. [2020-10-14 09:12:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 09:12:44,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:44,334 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] [2020-10-14 09:12:44,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:12:44,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:44,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1272360834, now seen corresponding path program 1 times [2020-10-14 09:12:44,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:44,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407083735] [2020-10-14 09:12:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:44,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:44,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:44,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:44,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 09:12:44,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:12:44,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-14 09:12:44,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:44,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:44,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:12:44,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 09:12:44,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:12:44,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:45,178 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:12:45,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:45,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:45,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:45,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:12:45,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:45,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:45,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407083735] [2020-10-14 09:12:45,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:12:45,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:12:45,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631695700] [2020-10-14 09:12:45,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:12:45,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:45,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:12:45,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:12:45,209 INFO L87 Difference]: Start difference. First operand 281 states and 428 transitions. Second operand 4 states. [2020-10-14 09:12:45,369 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:12:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:46,006 INFO L93 Difference]: Finished difference Result 717 states and 1118 transitions. [2020-10-14 09:12:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:12:46,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-14 09:12:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:46,012 INFO L225 Difference]: With dead ends: 717 [2020-10-14 09:12:46,012 INFO L226 Difference]: Without dead ends: 467 [2020-10-14 09:12:46,019 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 [2020-10-14 09:12:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-14 09:12:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 465. [2020-10-14 09:12:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-10-14 09:12:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 716 transitions. [2020-10-14 09:12:46,063 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 716 transitions. Word has length 54 [2020-10-14 09:12:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:46,064 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 716 transitions. [2020-10-14 09:12:46,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:12:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 716 transitions. [2020-10-14 09:12:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 09:12:46,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:46,066 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] [2020-10-14 09:12:46,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:12:46,067 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:46,067 INFO L82 PathProgramCache]: Analyzing trace with hash -136629004, now seen corresponding path program 1 times [2020-10-14 09:12:46,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:46,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875330266] [2020-10-14 09:12:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:46,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:46,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 09:12:46,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:12:46,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-14 09:12:46,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:46,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:46,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:12:46,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:12:46,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:12:46,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:46,657 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:12:46,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:46,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:46,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:46,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:46,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:12:46,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:46,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:46,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:46,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:46,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:46,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875330266] [2020-10-14 09:12:46,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:12:46,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:12:46,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903192854] [2020-10-14 09:12:46,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:12:46,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:46,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:12:46,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:12:46,693 INFO L87 Difference]: Start difference. First operand 465 states and 716 transitions. Second operand 4 states. [2020-10-14 09:12:46,862 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:12:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:47,338 INFO L93 Difference]: Finished difference Result 1205 states and 1878 transitions. [2020-10-14 09:12:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:12:47,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-14 09:12:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:47,343 INFO L225 Difference]: With dead ends: 1205 [2020-10-14 09:12:47,343 INFO L226 Difference]: Without dead ends: 771 [2020-10-14 09:12:47,345 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 [2020-10-14 09:12:47,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-10-14 09:12:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 769. [2020-10-14 09:12:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2020-10-14 09:12:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1184 transitions. [2020-10-14 09:12:47,382 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1184 transitions. Word has length 55 [2020-10-14 09:12:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:47,383 INFO L479 AbstractCegarLoop]: Abstraction has 769 states and 1184 transitions. [2020-10-14 09:12:47,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:12:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1184 transitions. [2020-10-14 09:12:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 09:12:47,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:47,384 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] [2020-10-14 09:12:47,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:12:47,385 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:47,385 INFO L82 PathProgramCache]: Analyzing trace with hash 417494013, now seen corresponding path program 1 times [2020-10-14 09:12:47,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:47,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796172879] [2020-10-14 09:12:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:47,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:47,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:48,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:48,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 09:12:48,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:12:48,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-14 09:12:48,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:48,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:48,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:12:48,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:12:48,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:12:48,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:48,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:48,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:48,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:48,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:48,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:48,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:12:48,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:48,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:48,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:48,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:48,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:48,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:48,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796172879] [2020-10-14 09:12:48,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:12:48,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 09:12:48,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081444367] [2020-10-14 09:12:48,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:12:48,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:48,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:12:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:12:48,414 INFO L87 Difference]: Start difference. First operand 769 states and 1184 transitions. Second operand 7 states. [2020-10-14 09:12:48,570 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-14 09:12:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:49,167 INFO L93 Difference]: Finished difference Result 4459 states and 6949 transitions. [2020-10-14 09:12:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 09:12:49,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-14 09:12:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:49,188 INFO L225 Difference]: With dead ends: 4459 [2020-10-14 09:12:49,189 INFO L226 Difference]: Without dead ends: 3721 [2020-10-14 09:12:49,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:12:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2020-10-14 09:12:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 1505. [2020-10-14 09:12:49,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2020-10-14 09:12:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2304 transitions. [2020-10-14 09:12:49,317 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2304 transitions. Word has length 56 [2020-10-14 09:12:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:49,317 INFO L479 AbstractCegarLoop]: Abstraction has 1505 states and 2304 transitions. [2020-10-14 09:12:49,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:12:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2304 transitions. [2020-10-14 09:12:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 09:12:49,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:49,318 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] [2020-10-14 09:12:49,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:12:49,319 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:49,319 INFO L82 PathProgramCache]: Analyzing trace with hash 38879762, now seen corresponding path program 1 times [2020-10-14 09:12:49,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:49,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177328953] [2020-10-14 09:12:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:49,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:49,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:49,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 09:12:49,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:12:49,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-14 09:12:49,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:49,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:49,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:12:49,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 09:12:49,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:12:49,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:49,903 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:12:49,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:49,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:49,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:49,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:49,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:49,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:12:49,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:49,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:49,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:49,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:49,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:49,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:49,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177328953] [2020-10-14 09:12:49,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:12:49,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:12:49,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440706127] [2020-10-14 09:12:49,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:12:49,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:12:49,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:12:49,935 INFO L87 Difference]: Start difference. First operand 1505 states and 2304 transitions. Second operand 5 states. [2020-10-14 09:12:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:50,764 INFO L93 Difference]: Finished difference Result 3043 states and 4641 transitions. [2020-10-14 09:12:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:12:50,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-14 09:12:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:50,780 INFO L225 Difference]: With dead ends: 3043 [2020-10-14 09:12:50,780 INFO L226 Difference]: Without dead ends: 3041 [2020-10-14 09:12:50,782 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 [2020-10-14 09:12:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2020-10-14 09:12:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1569. [2020-10-14 09:12:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1569 states. [2020-10-14 09:12:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2368 transitions. [2020-10-14 09:12:50,938 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2368 transitions. Word has length 57 [2020-10-14 09:12:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:50,938 INFO L479 AbstractCegarLoop]: Abstraction has 1569 states and 2368 transitions. [2020-10-14 09:12:50,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:12:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2368 transitions. [2020-10-14 09:12:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 09:12:50,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:50,940 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] [2020-10-14 09:12:50,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:12:50,941 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:50,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:50,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1214892364, now seen corresponding path program 1 times [2020-10-14 09:12:50,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:50,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376535655] [2020-10-14 09:12:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:50,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:51,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:51,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:51,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 09:12:51,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:12:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-14 09:12:51,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:51,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:51,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:12:51,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:12:51,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 09:12:51,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:51,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:51,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:51,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:51,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:51,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:51,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:12:51,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:51,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:51,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:51,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:51,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:51,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:51,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376535655] [2020-10-14 09:12:51,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:12:51,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:12:51,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223466104] [2020-10-14 09:12:51,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:12:51,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:51,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:12:51,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:12:51,508 INFO L87 Difference]: Start difference. First operand 1569 states and 2368 transitions. Second operand 4 states. [2020-10-14 09:12:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:52,328 INFO L93 Difference]: Finished difference Result 3895 states and 5900 transitions. [2020-10-14 09:12:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:12:52,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-14 09:12:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:52,340 INFO L225 Difference]: With dead ends: 3895 [2020-10-14 09:12:52,341 INFO L226 Difference]: Without dead ends: 2357 [2020-10-14 09:12:52,344 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 [2020-10-14 09:12:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2020-10-14 09:12:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2355. [2020-10-14 09:12:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2355 states. [2020-10-14 09:12:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3546 transitions. [2020-10-14 09:12:52,531 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3546 transitions. Word has length 58 [2020-10-14 09:12:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:52,533 INFO L479 AbstractCegarLoop]: Abstraction has 2355 states and 3546 transitions. [2020-10-14 09:12:52,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:12:52,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3546 transitions. [2020-10-14 09:12:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:12:52,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:52,535 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:12:52,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:12:52,536 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1349339258, now seen corresponding path program 1 times [2020-10-14 09:12:52,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:52,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227027852] [2020-10-14 09:12:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:52,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:52,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:53,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:53,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:12:53,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:12:53,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-14 09:12:53,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:53,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:12:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:12:53,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 09:12:53,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:53,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:53,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:53,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:53,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:53,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:12:53,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:53,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:53,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:53,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:53,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:53,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:12:53,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227027852] [2020-10-14 09:12:53,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:12:53,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 09:12:53,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349040821] [2020-10-14 09:12:53,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:12:53,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:53,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:12:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:12:53,507 INFO L87 Difference]: Start difference. First operand 2355 states and 3546 transitions. Second operand 5 states. [2020-10-14 09:12:53,702 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-14 09:12:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:12:54,579 INFO L93 Difference]: Finished difference Result 5369 states and 8125 transitions. [2020-10-14 09:12:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:12:54,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-14 09:12:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:12:54,599 INFO L225 Difference]: With dead ends: 5369 [2020-10-14 09:12:54,599 INFO L226 Difference]: Without dead ends: 3831 [2020-10-14 09:12:54,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:12:54,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2020-10-14 09:12:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3827. [2020-10-14 09:12:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3827 states. [2020-10-14 09:12:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 5754 transitions. [2020-10-14 09:12:54,981 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 5754 transitions. Word has length 79 [2020-10-14 09:12:54,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:12:54,981 INFO L479 AbstractCegarLoop]: Abstraction has 3827 states and 5754 transitions. [2020-10-14 09:12:54,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:12:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 5754 transitions. [2020-10-14 09:12:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:12:54,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:12:54,990 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:12:54,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:12:54,990 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:12:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:12:54,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1384911737, now seen corresponding path program 1 times [2020-10-14 09:12:54,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:12:54,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326713367] [2020-10-14 09:12:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:12:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:55,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:55,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:56,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:59,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:59,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:12:59,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:12:59,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4025 [2020-10-14 09:12:59,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:59,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:12:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:12:59,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:12:59,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:12:59,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:12:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:12:59,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:12:59,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:12:59,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:12:59,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:12:59,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:12:59,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:12:59,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:12:59,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:12:59,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:12:59,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:12:59,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:12:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:12:59,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326713367] [2020-10-14 09:12:59,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:12:59,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:12:59,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261389977] [2020-10-14 09:12:59,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:12:59,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:12:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:12:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:12:59,209 INFO L87 Difference]: Start difference. First operand 3827 states and 5754 transitions. Second operand 4 states. [2020-10-14 09:12:59,339 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:13:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:00,175 INFO L93 Difference]: Finished difference Result 10975 states and 16476 transitions. [2020-10-14 09:13:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:00,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:13:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:00,208 INFO L225 Difference]: With dead ends: 10975 [2020-10-14 09:13:00,208 INFO L226 Difference]: Without dead ends: 7181 [2020-10-14 09:13:00,221 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 [2020-10-14 09:13:00,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7181 states. [2020-10-14 09:13:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7181 to 7179. [2020-10-14 09:13:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7179 states. [2020-10-14 09:13:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 10674 transitions. [2020-10-14 09:13:00,817 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 10674 transitions. Word has length 80 [2020-10-14 09:13:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:00,818 INFO L479 AbstractCegarLoop]: Abstraction has 7179 states and 10674 transitions. [2020-10-14 09:13:00,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 10674 transitions. [2020-10-14 09:13:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:13:00,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:00,821 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:13:00,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:13:00,822 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:00,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1871747568, now seen corresponding path program 1 times [2020-10-14 09:13:00,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:00,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728522708] [2020-10-14 09:13:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:00,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:00,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:01,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:01,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:04,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:04,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:13:04,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:13:04,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3986 [2020-10-14 09:13:04,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:04,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:04,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:04,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:13:04,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 09:13:04,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:05,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:05,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:05,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:05,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:05,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:13:05,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:05,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:05,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:05,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:05,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728522708] [2020-10-14 09:13:05,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:05,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:05,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244381781] [2020-10-14 09:13:05,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:05,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:05,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:05,034 INFO L87 Difference]: Start difference. First operand 7179 states and 10674 transitions. Second operand 4 states. [2020-10-14 09:13:05,168 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:13:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:06,768 INFO L93 Difference]: Finished difference Result 20591 states and 30516 transitions. [2020-10-14 09:13:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:06,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:13:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:06,829 INFO L225 Difference]: With dead ends: 20591 [2020-10-14 09:13:06,829 INFO L226 Difference]: Without dead ends: 13445 [2020-10-14 09:13:06,847 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 [2020-10-14 09:13:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13445 states. [2020-10-14 09:13:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13445 to 13443. [2020-10-14 09:13:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13443 states. [2020-10-14 09:13:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13443 states to 13443 states and 19714 transitions. [2020-10-14 09:13:07,881 INFO L78 Accepts]: Start accepts. Automaton has 13443 states and 19714 transitions. Word has length 80 [2020-10-14 09:13:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:07,882 INFO L479 AbstractCegarLoop]: Abstraction has 13443 states and 19714 transitions. [2020-10-14 09:13:07,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 13443 states and 19714 transitions. [2020-10-14 09:13:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:13:07,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:07,887 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:13:07,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:13:07,887 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash 93539112, now seen corresponding path program 1 times [2020-10-14 09:13:07,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:07,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984955482] [2020-10-14 09:13:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:07,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:07,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:07,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:08,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:08,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:11,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:11,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:13:11,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:13:11,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3788 [2020-10-14 09:13:11,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:11,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 09:13:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 09:13:11,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:11,863 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:13:11,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:11,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:11,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:11,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:11,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:11,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:13:11,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:11,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:11,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:11,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:11,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984955482] [2020-10-14 09:13:11,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:11,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:11,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132950491] [2020-10-14 09:13:11,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:11,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:11,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:11,907 INFO L87 Difference]: Start difference. First operand 13443 states and 19714 transitions. Second operand 4 states. [2020-10-14 09:13:12,044 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:13:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:13,546 INFO L93 Difference]: Finished difference Result 38503 states and 56196 transitions. [2020-10-14 09:13:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:13,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:13:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:13,623 INFO L225 Difference]: With dead ends: 38503 [2020-10-14 09:13:13,623 INFO L226 Difference]: Without dead ends: 25093 [2020-10-14 09:13:13,649 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 [2020-10-14 09:13:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25093 states. [2020-10-14 09:13:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25093 to 25091. [2020-10-14 09:13:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25091 states. [2020-10-14 09:13:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25091 states to 25091 states and 36194 transitions. [2020-10-14 09:13:15,925 INFO L78 Accepts]: Start accepts. Automaton has 25091 states and 36194 transitions. Word has length 80 [2020-10-14 09:13:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:15,926 INFO L479 AbstractCegarLoop]: Abstraction has 25091 states and 36194 transitions. [2020-10-14 09:13:15,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25091 states and 36194 transitions. [2020-10-14 09:13:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:13:15,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:15,934 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:13:15,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:13:15,934 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:15,934 INFO L82 PathProgramCache]: Analyzing trace with hash 987723763, now seen corresponding path program 1 times [2020-10-14 09:13:15,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:15,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170981756] [2020-10-14 09:13:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:15,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:16,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:16,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:18,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:18,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:13:18,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:13:18,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2527 [2020-10-14 09:13:18,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:18,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:13:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 09:13:18,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 09:13:18,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:13:18,634 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:13:18,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:18,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:18,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:18,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:18,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:18,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:13:18,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:18,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:18,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:18,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:18,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:18,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:13:18,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170981756] [2020-10-14 09:13:18,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:13:18,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:13:18,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977143076] [2020-10-14 09:13:18,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:13:18,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:18,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:13:18,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:13:18,681 INFO L87 Difference]: Start difference. First operand 25091 states and 36194 transitions. Second operand 4 states. [2020-10-14 09:13:18,868 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-14 09:13:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:21,064 INFO L93 Difference]: Finished difference Result 71239 states and 102116 transitions. [2020-10-14 09:13:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:13:21,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-14 09:13:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:21,200 INFO L225 Difference]: With dead ends: 71239 [2020-10-14 09:13:21,201 INFO L226 Difference]: Without dead ends: 46181 [2020-10-14 09:13:21,246 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 [2020-10-14 09:13:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46181 states. [2020-10-14 09:13:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46181 to 46179. [2020-10-14 09:13:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46179 states. [2020-10-14 09:13:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46179 states to 46179 states and 65314 transitions. [2020-10-14 09:13:23,424 INFO L78 Accepts]: Start accepts. Automaton has 46179 states and 65314 transitions. Word has length 80 [2020-10-14 09:13:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:23,424 INFO L479 AbstractCegarLoop]: Abstraction has 46179 states and 65314 transitions. [2020-10-14 09:13:23,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:13:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 46179 states and 65314 transitions. [2020-10-14 09:13:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:13:23,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:23,437 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:13:23,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:13:23,437 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:23,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash 354678689, now seen corresponding path program 1 times [2020-10-14 09:13:23,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:23,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977740550] [2020-10-14 09:13:23,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:23,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:23,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:23,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:23,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:23,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:24,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:28,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:28,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:13:28,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:13:28,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:13:28,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:28,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:13:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 09:13:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 09:13:28,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:13:28,663 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:13:28,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:28,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:28,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:28,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:28,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:28,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:13:28,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:28,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:28,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:28,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:28,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:28,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 09:13:28,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977740550] [2020-10-14 09:13:28,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:13:28,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:13:28,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100594669] [2020-10-14 09:13:28,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:13:28,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:13:28,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:13:28,714 INFO L87 Difference]: Start difference. First operand 46179 states and 65314 transitions. Second operand 7 states. [2020-10-14 09:13:28,949 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 09:13:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:37,237 INFO L93 Difference]: Finished difference Result 194225 states and 278931 transitions. [2020-10-14 09:13:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:13:37,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 09:13:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:37,645 INFO L225 Difference]: With dead ends: 194225 [2020-10-14 09:13:37,645 INFO L226 Difference]: Without dead ends: 170767 [2020-10-14 09:13:37,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:13:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170767 states. [2020-10-14 09:13:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170767 to 75587. [2020-10-14 09:13:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75587 states. [2020-10-14 09:13:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75587 states to 75587 states and 107042 transitions. [2020-10-14 09:13:43,622 INFO L78 Accepts]: Start accepts. Automaton has 75587 states and 107042 transitions. Word has length 82 [2020-10-14 09:13:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:13:43,623 INFO L479 AbstractCegarLoop]: Abstraction has 75587 states and 107042 transitions. [2020-10-14 09:13:43,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:13:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 75587 states and 107042 transitions. [2020-10-14 09:13:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:13:43,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:13:43,634 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:13:43,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:13:43,635 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:13:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:13:43,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1688404959, now seen corresponding path program 1 times [2020-10-14 09:13:43,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:13:43,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211615280] [2020-10-14 09:13:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:13:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:43,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:43,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:43,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:44,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:45,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:45,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:13:45,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:13:45,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2039 [2020-10-14 09:13:45,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:45,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:13:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:13:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 09:13:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:13:45,860 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-14 09:13:45,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:13:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:13:45,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:13:45,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:13:45,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:13:45,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:13:45,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:13:45,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:13:45,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:13:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:13:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:13:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:13:45,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:13:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 09:13:45,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211615280] [2020-10-14 09:13:45,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:13:45,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:13:45,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778007314] [2020-10-14 09:13:45,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:13:45,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:13:45,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:13:45,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:13:45,902 INFO L87 Difference]: Start difference. First operand 75587 states and 107042 transitions. Second operand 7 states. [2020-10-14 09:13:46,071 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 09:13:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:13:56,230 INFO L93 Difference]: Finished difference Result 219825 states and 312595 transitions. [2020-10-14 09:13:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:13:56,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 09:13:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:13:56,571 INFO L225 Difference]: With dead ends: 219825 [2020-10-14 09:13:56,572 INFO L226 Difference]: Without dead ends: 175855 [2020-10-14 09:13:56,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:13:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175855 states. [2020-10-14 09:14:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175855 to 87011. [2020-10-14 09:14:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87011 states. [2020-10-14 09:14:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87011 states to 87011 states and 123298 transitions. [2020-10-14 09:14:01,962 INFO L78 Accepts]: Start accepts. Automaton has 87011 states and 123298 transitions. Word has length 82 [2020-10-14 09:14:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:01,962 INFO L479 AbstractCegarLoop]: Abstraction has 87011 states and 123298 transitions. [2020-10-14 09:14:01,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:14:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 87011 states and 123298 transitions. [2020-10-14 09:14:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:14:01,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:01,972 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:14:01,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:14:01,972 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2017842320, now seen corresponding path program 1 times [2020-10-14 09:14:01,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:01,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270914716] [2020-10-14 09:14:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:02,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:02,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:02,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:04,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:05,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:05,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:14:05,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:14:05,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3065 [2020-10-14 09:14:05,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:05,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:14:05,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:14:05,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 09:14:05,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:05,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:05,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:05,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:05,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:05,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:14:05,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:05,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:05,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 09:14:05,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270914716] [2020-10-14 09:14:05,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:14:05,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:14:05,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406275704] [2020-10-14 09:14:05,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:14:05,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:05,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:14:05,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:14:05,232 INFO L87 Difference]: Start difference. First operand 87011 states and 123298 transitions. Second operand 7 states. [2020-10-14 09:14:05,386 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 09:14:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:15,852 INFO L93 Difference]: Finished difference Result 232889 states and 331011 transitions. [2020-10-14 09:14:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:14:15,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 09:14:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:16,138 INFO L225 Difference]: With dead ends: 232889 [2020-10-14 09:14:16,143 INFO L226 Difference]: Without dead ends: 188919 [2020-10-14 09:14:16,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:14:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188919 states. [2020-10-14 09:14:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188919 to 98435. [2020-10-14 09:14:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98435 states. [2020-10-14 09:14:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98435 states to 98435 states and 139554 transitions. [2020-10-14 09:14:25,416 INFO L78 Accepts]: Start accepts. Automaton has 98435 states and 139554 transitions. Word has length 82 [2020-10-14 09:14:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:25,417 INFO L479 AbstractCegarLoop]: Abstraction has 98435 states and 139554 transitions. [2020-10-14 09:14:25,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:14:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 98435 states and 139554 transitions. [2020-10-14 09:14:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 09:14:25,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:25,426 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:14:25,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:14:25,426 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:25,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1311972802, now seen corresponding path program 1 times [2020-10-14 09:14:25,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:25,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789474793] [2020-10-14 09:14:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:25,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:25,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:25,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:25,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:27,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:30,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:30,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 09:14:30,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:14:30,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 09:14:30,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:30,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:30,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 09:14:30,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:14:30,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 09:14:30,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:30,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:30,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:30,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:30,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:30,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:30,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:14:30,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:30,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:30,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:30,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 09:14:30,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789474793] [2020-10-14 09:14:30,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:14:30,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 09:14:30,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474060677] [2020-10-14 09:14:30,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 09:14:30,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 09:14:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:14:30,612 INFO L87 Difference]: Start difference. First operand 98435 states and 139554 transitions. Second operand 7 states. [2020-10-14 09:14:30,781 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 09:14:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:14:42,853 INFO L93 Difference]: Finished difference Result 244553 states and 347417 transitions. [2020-10-14 09:14:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:14:42,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 09:14:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:14:43,100 INFO L225 Difference]: With dead ends: 244553 [2020-10-14 09:14:43,101 INFO L226 Difference]: Without dead ends: 200583 [2020-10-14 09:14:43,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 09:14:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200583 states. [2020-10-14 09:14:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200583 to 109859. [2020-10-14 09:14:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109859 states. [2020-10-14 09:14:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109859 states to 109859 states and 155810 transitions. [2020-10-14 09:14:51,382 INFO L78 Accepts]: Start accepts. Automaton has 109859 states and 155810 transitions. Word has length 82 [2020-10-14 09:14:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:14:51,383 INFO L479 AbstractCegarLoop]: Abstraction has 109859 states and 155810 transitions. [2020-10-14 09:14:51,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 09:14:51,383 INFO L276 IsEmpty]: Start isEmpty. Operand 109859 states and 155810 transitions. [2020-10-14 09:14:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 09:14:51,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:14:51,396 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:14:51,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:14:51,397 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:14:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:14:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash 24442727, now seen corresponding path program 1 times [2020-10-14 09:14:51,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:14:51,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578388485] [2020-10-14 09:14:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:14:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:51,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:51,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:51,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:52,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:53,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:53,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:53,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:53,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:56,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:56,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:56,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:56,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 09:14:56,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 09:14:56,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:14:56,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:56,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:56,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:14:56,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:14:56,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 09:14:56,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:56,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:14:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:14:56,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:14:56,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:14:56,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:14:56,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:14:56,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 09:14:56,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:14:56,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:14:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:14:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:14:56,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:14:56,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:14:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:14:56,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578388485] [2020-10-14 09:14:56,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 09:14:56,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 09:14:56,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129249911] [2020-10-14 09:14:56,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:14:56,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:14:56,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:14:56,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:14:56,569 INFO L87 Difference]: Start difference. First operand 109859 states and 155810 transitions. Second operand 6 states. [2020-10-14 09:15:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:15:36,031 INFO L93 Difference]: Finished difference Result 667931 states and 941066 transitions. [2020-10-14 09:15:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 09:15:36,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-14 09:15:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:15:36,761 INFO L225 Difference]: With dead ends: 667931 [2020-10-14 09:15:36,762 INFO L226 Difference]: Without dead ends: 558105 [2020-10-14 09:15:36,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-14 09:15:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558105 states. [2020-10-14 09:16:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558105 to 410147. [2020-10-14 09:16:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410147 states. [2020-10-14 09:16:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410147 states to 410147 states and 577250 transitions. [2020-10-14 09:16:11,525 INFO L78 Accepts]: Start accepts. Automaton has 410147 states and 577250 transitions. Word has length 87 [2020-10-14 09:16:11,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:16:11,526 INFO L479 AbstractCegarLoop]: Abstraction has 410147 states and 577250 transitions. [2020-10-14 09:16:11,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:16:11,526 INFO L276 IsEmpty]: Start isEmpty. Operand 410147 states and 577250 transitions. [2020-10-14 09:16:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 09:16:11,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:16:11,555 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 09:16:11,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:16:11,555 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:16:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:16:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1050889652, now seen corresponding path program 1 times [2020-10-14 09:16:11,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:16:11,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548725643] [2020-10-14 09:16:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:16:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:16:11,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:11,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:16:11,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking...