/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_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:19:56,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:19:56,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:19:56,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:19:56,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:19:56,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:19:56,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:19:56,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:19:56,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:19:56,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:19:56,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:19:56,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:19:56,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:19:56,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:19:56,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:19:56,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:19:56,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:19:56,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:19:56,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:19:56,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:19:56,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:19:56,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:19:56,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:19:56,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:19:56,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:19:56,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:19:56,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:19:56,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:19:56,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:19:56,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:19:56,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:19:56,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:19:56,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:19:56,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:19:56,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:19:56,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:19:56,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:19:56,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:19:56,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:19:56,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:19:56,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:19:56,604 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 08:19:56,648 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:19:56,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:19:56,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:19:56,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:19:56,650 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:19:56,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:19:56,650 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:19:56,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:19:56,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:19:56,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:19:56,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:19:56,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:19:56,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:19:56,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:19:56,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:19:56,653 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:19:56,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:19:56,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:19:56,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:19:56,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:19:56,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:19:56,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:19:56,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:19:56,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:19:56,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:19:56,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:19:56,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:19:56,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:19:56,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:19:56,656 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 08:19:56,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:19:56,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:19:56,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:19:56,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:19:56,949 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:19:56,949 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:19:57,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f0bad7a4/3becfd2fbc994fcf973175e9de9ce448/FLAGa7a7ca49e [2020-10-14 08:19:57,535 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:19:57,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:19:57,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f0bad7a4/3becfd2fbc994fcf973175e9de9ce448/FLAGa7a7ca49e [2020-10-14 08:19:57,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f0bad7a4/3becfd2fbc994fcf973175e9de9ce448 [2020-10-14 08:19:57,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:19:57,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:19:57,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:19:57,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:19:57,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:19:57,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:19:57" (1/1) ... [2020-10-14 08:19:57,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9260ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:57, skipping insertion in model container [2020-10-14 08:19:57,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:19:57" (1/1) ... [2020-10-14 08:19:57,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:19:57,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:19:58,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:19:58,397 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:19:58,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:19:58,532 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:19:58,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58 WrapperNode [2020-10-14 08:19:58,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:19:58,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:19:58,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:19:58,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:19:58,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (1/1) ... [2020-10-14 08:19:58,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (1/1) ... [2020-10-14 08:19:58,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (1/1) ... [2020-10-14 08:19:58,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (1/1) ... [2020-10-14 08:19:58,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (1/1) ... [2020-10-14 08:19:58,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (1/1) ... [2020-10-14 08:19:58,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (1/1) ... [2020-10-14 08:19:58,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:19:58,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:19:58,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:19:58,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:19:58,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (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 08:19:58,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:19:58,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:19:58,669 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:19:58,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:19:58,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:19:58,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:19:58,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:19:58,670 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:19:58,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:19:58,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:19:58,670 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:19:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:19:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:19:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:19:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:19:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:19:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:19:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:19:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:19:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:19:59,446 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:19:59,446 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:19:59,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:19:59 BoogieIcfgContainer [2020-10-14 08:19:59,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:19:59,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:19:59,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:19:59,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:19:59,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:19:57" (1/3) ... [2020-10-14 08:19:59,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ca03f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:19:59, skipping insertion in model container [2020-10-14 08:19:59,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:19:58" (2/3) ... [2020-10-14 08:19:59,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ca03f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:19:59, skipping insertion in model container [2020-10-14 08:19:59,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:19:59" (3/3) ... [2020-10-14 08:19:59,461 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:19:59,473 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:19:59,482 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:19:59,497 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:19:59,525 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:19:59,525 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:19:59,525 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:19:59,525 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:19:59,526 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:19:59,526 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:19:59,526 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:19:59,526 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:19:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-14 08:19:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 08:19:59,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:19:59,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:19:59,563 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:19:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:19:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1817058804, now seen corresponding path program 1 times [2020-10-14 08:19:59,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:19:59,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438416015] [2020-10-14 08:19:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:19:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:00,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:00,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:00,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:01,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:02,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 08:20:02,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:20:02,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2071 [2020-10-14 08:20:02,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:02,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:20:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:20:02,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 08:20:02,339 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:02,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:02,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:02,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:02,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:02,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:02,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-14 08:20:02,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:02,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:02,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:02,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438416015] [2020-10-14 08:20:02,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:02,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:02,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454435736] [2020-10-14 08:20:02,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:02,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:02,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:02,450 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2020-10-14 08:20:02,707 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:20:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:03,455 INFO L93 Difference]: Finished difference Result 297 states and 502 transitions. [2020-10-14 08:20:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:03,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-14 08:20:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:03,471 INFO L225 Difference]: With dead ends: 297 [2020-10-14 08:20:03,471 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 08:20:03,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 08:20:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-10-14 08:20:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-14 08:20:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 325 transitions. [2020-10-14 08:20:03,538 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 325 transitions. Word has length 61 [2020-10-14 08:20:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:03,539 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 325 transitions. [2020-10-14 08:20:03,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 325 transitions. [2020-10-14 08:20:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 08:20:03,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:03,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:03,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:20:03,543 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:03,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1858684161, now seen corresponding path program 1 times [2020-10-14 08:20:03,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:03,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823393761] [2020-10-14 08:20:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:03,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:03,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:03,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:04,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:04,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:07,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:07,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 08:20:07,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:20:07,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4121 [2020-10-14 08:20:07,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:07,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 08:20:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:20:07,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:07,957 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:07,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:07,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:07,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:07,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:07,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:07,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:20:07,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:07,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:07,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:07,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:07,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:07,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:08,006 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 08:20:08,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823393761] [2020-10-14 08:20:08,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:08,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:08,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465462957] [2020-10-14 08:20:08,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:08,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:08,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:08,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:08,011 INFO L87 Difference]: Start difference. First operand 205 states and 325 transitions. Second operand 4 states. [2020-10-14 08:20:08,275 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:20:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:09,070 INFO L93 Difference]: Finished difference Result 485 states and 797 transitions. [2020-10-14 08:20:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:09,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-14 08:20:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:09,074 INFO L225 Difference]: With dead ends: 485 [2020-10-14 08:20:09,074 INFO L226 Difference]: Without dead ends: 338 [2020-10-14 08:20:09,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-14 08:20:09,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2020-10-14 08:20:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-14 08:20:09,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 545 transitions. [2020-10-14 08:20:09,106 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 545 transitions. Word has length 63 [2020-10-14 08:20:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:09,107 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 545 transitions. [2020-10-14 08:20:09,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:09,107 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 545 transitions. [2020-10-14 08:20:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 08:20:09,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:09,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:09,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:20:09,111 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash 488010793, now seen corresponding path program 1 times [2020-10-14 08:20:09,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:09,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294970094] [2020-10-14 08:20:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:09,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:09,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:09,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:09,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:10,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:11,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:14,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:14,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 08:20:14,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:20:14,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 08:20:14,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:14,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 08:20:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 08:20:14,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:14,439 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:14,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:14,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:14,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:14,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:14,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:14,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:20:14,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:14,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:14,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:14,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:14,480 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 08:20:14,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294970094] [2020-10-14 08:20:14,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:14,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:14,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532812866] [2020-10-14 08:20:14,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:14,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:14,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:14,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:14,487 INFO L87 Difference]: Start difference. First operand 336 states and 545 transitions. Second operand 4 states. [2020-10-14 08:20:14,699 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-14 08:20:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:15,471 INFO L93 Difference]: Finished difference Result 856 states and 1415 transitions. [2020-10-14 08:20:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:15,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 08:20:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:15,478 INFO L225 Difference]: With dead ends: 856 [2020-10-14 08:20:15,478 INFO L226 Difference]: Without dead ends: 578 [2020-10-14 08:20:15,481 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 08:20:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-10-14 08:20:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 576. [2020-10-14 08:20:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-10-14 08:20:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 925 transitions. [2020-10-14 08:20:15,568 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 925 transitions. Word has length 65 [2020-10-14 08:20:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:15,569 INFO L479 AbstractCegarLoop]: Abstraction has 576 states and 925 transitions. [2020-10-14 08:20:15,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 925 transitions. [2020-10-14 08:20:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:20:15,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:15,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:15,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:20:15,572 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:15,573 INFO L82 PathProgramCache]: Analyzing trace with hash -424133459, now seen corresponding path program 1 times [2020-10-14 08:20:15,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:15,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739059267] [2020-10-14 08:20:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:15,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:15,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:15,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:15,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:15,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:16,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:16,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:16,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:20,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:20,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:20:20,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:20:20,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:20:20,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:20,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:20,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:20,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:20:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 08:20:20,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 08:20:20,830 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:20,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:20,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:20,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:20,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:20,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:20,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:20:20,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:20,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:20,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:20,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:20,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:20,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:20,863 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 08:20:20,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739059267] [2020-10-14 08:20:20,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:20,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:20,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289901460] [2020-10-14 08:20:20,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:20,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:20,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:20,867 INFO L87 Difference]: Start difference. First operand 576 states and 925 transitions. Second operand 4 states. [2020-10-14 08:20:21,044 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:20:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:21,818 INFO L93 Difference]: Finished difference Result 1071 states and 1741 transitions. [2020-10-14 08:20:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:21,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:20:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:21,823 INFO L225 Difference]: With dead ends: 1071 [2020-10-14 08:20:21,824 INFO L226 Difference]: Without dead ends: 797 [2020-10-14 08:20:21,825 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 08:20:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2020-10-14 08:20:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 795. [2020-10-14 08:20:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-10-14 08:20:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1281 transitions. [2020-10-14 08:20:21,865 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1281 transitions. Word has length 67 [2020-10-14 08:20:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:21,865 INFO L479 AbstractCegarLoop]: Abstraction has 795 states and 1281 transitions. [2020-10-14 08:20:21,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1281 transitions. [2020-10-14 08:20:21,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:20:21,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:21,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:21,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:20:21,868 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1589480936, now seen corresponding path program 1 times [2020-10-14 08:20:21,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:21,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271913518] [2020-10-14 08:20:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:21,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:21,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:22,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:22,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:22,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:22,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:23,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:23,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:26,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:26,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:20:26,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:20:26,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 08:20:26,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:26,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:26,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:26,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:20:26,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 08:20:26,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:27,116 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:27,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:27,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:27,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:27,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:27,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 08:20:27,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:27,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:27,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:27,173 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 08:20:27,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271913518] [2020-10-14 08:20:27,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:27,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:27,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106616381] [2020-10-14 08:20:27,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:27,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:27,177 INFO L87 Difference]: Start difference. First operand 795 states and 1281 transitions. Second operand 4 states. [2020-10-14 08:20:27,454 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:20:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:28,550 INFO L93 Difference]: Finished difference Result 1451 states and 2391 transitions. [2020-10-14 08:20:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:28,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:20:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:28,563 INFO L225 Difference]: With dead ends: 1451 [2020-10-14 08:20:28,564 INFO L226 Difference]: Without dead ends: 1058 [2020-10-14 08:20:28,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2020-10-14 08:20:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1056. [2020-10-14 08:20:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2020-10-14 08:20:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1718 transitions. [2020-10-14 08:20:28,649 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1718 transitions. Word has length 67 [2020-10-14 08:20:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:28,650 INFO L479 AbstractCegarLoop]: Abstraction has 1056 states and 1718 transitions. [2020-10-14 08:20:28,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1718 transitions. [2020-10-14 08:20:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:20:28,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:28,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:28,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:20:28,655 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1413057439, now seen corresponding path program 1 times [2020-10-14 08:20:28,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:28,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274964297] [2020-10-14 08:20:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:28,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:28,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:28,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:29,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:30,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:30,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:33,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:33,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:20:33,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:20:33,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:20:33,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:33,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:20:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:20:33,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 08:20:33,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:33,933 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:33,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:33,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:33,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:33,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:33,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:20:33,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:33,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:33,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:33,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:33,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:33,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:33,979 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 08:20:33,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274964297] [2020-10-14 08:20:33,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:33,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:20:33,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542286709] [2020-10-14 08:20:33,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:20:33,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:20:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:33,982 INFO L87 Difference]: Start difference. First operand 1056 states and 1718 transitions. Second operand 5 states. [2020-10-14 08:20:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:35,040 INFO L93 Difference]: Finished difference Result 3053 states and 4976 transitions. [2020-10-14 08:20:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:35,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-14 08:20:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:35,054 INFO L225 Difference]: With dead ends: 3053 [2020-10-14 08:20:35,054 INFO L226 Difference]: Without dead ends: 2022 [2020-10-14 08:20:35,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:20:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2020-10-14 08:20:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 2020. [2020-10-14 08:20:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-14 08:20:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3271 transitions. [2020-10-14 08:20:35,195 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3271 transitions. Word has length 67 [2020-10-14 08:20:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:35,199 INFO L479 AbstractCegarLoop]: Abstraction has 2020 states and 3271 transitions. [2020-10-14 08:20:35,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:20:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3271 transitions. [2020-10-14 08:20:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:20:35,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:35,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:35,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:20:35,203 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:35,203 INFO L82 PathProgramCache]: Analyzing trace with hash 865363584, now seen corresponding path program 1 times [2020-10-14 08:20:35,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:35,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843723284] [2020-10-14 08:20:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:35,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:35,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:35,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:35,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:35,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:35,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:35,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:37,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:40,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:40,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:20:40,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:20:40,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:20:40,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:40,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:20:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 08:20:40,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:40,483 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:40,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:40,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:40,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:40,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:40,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:40,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:20:40,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:40,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:40,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:40,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:40,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:40,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:40,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843723284] [2020-10-14 08:20:40,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:40,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:40,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903892495] [2020-10-14 08:20:40,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:40,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:40,539 INFO L87 Difference]: Start difference. First operand 2020 states and 3271 transitions. Second operand 4 states. [2020-10-14 08:20:40,769 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:20:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:41,584 INFO L93 Difference]: Finished difference Result 3754 states and 6148 transitions. [2020-10-14 08:20:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:41,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:20:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:41,602 INFO L225 Difference]: With dead ends: 3754 [2020-10-14 08:20:41,603 INFO L226 Difference]: Without dead ends: 2747 [2020-10-14 08:20:41,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2020-10-14 08:20:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2745. [2020-10-14 08:20:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2745 states. [2020-10-14 08:20:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 4452 transitions. [2020-10-14 08:20:41,837 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 4452 transitions. Word has length 67 [2020-10-14 08:20:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:41,837 INFO L479 AbstractCegarLoop]: Abstraction has 2745 states and 4452 transitions. [2020-10-14 08:20:41,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 4452 transitions. [2020-10-14 08:20:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:20:41,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:41,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:41,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:20:41,845 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:41,845 INFO L82 PathProgramCache]: Analyzing trace with hash -904568620, now seen corresponding path program 1 times [2020-10-14 08:20:41,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:41,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621309290] [2020-10-14 08:20:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:41,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:41,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:41,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:42,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:42,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:44,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:46,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:46,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:20:46,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:20:46,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:20:46,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:46,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:20:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:20:46,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:47,076 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:47,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:47,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:47,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:47,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:47,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:20:47,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:47,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:47,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:47,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:47,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:47,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:47,102 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 08:20:47,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621309290] [2020-10-14 08:20:47,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:47,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:47,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696332380] [2020-10-14 08:20:47,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:47,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:47,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:47,105 INFO L87 Difference]: Start difference. First operand 2745 states and 4452 transitions. Second operand 4 states. [2020-10-14 08:20:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:48,127 INFO L93 Difference]: Finished difference Result 8091 states and 13146 transitions. [2020-10-14 08:20:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:20:48,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 08:20:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:48,153 INFO L225 Difference]: With dead ends: 8091 [2020-10-14 08:20:48,154 INFO L226 Difference]: Without dead ends: 5449 [2020-10-14 08:20:48,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2020-10-14 08:20:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 2748. [2020-10-14 08:20:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2748 states. [2020-10-14 08:20:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 4456 transitions. [2020-10-14 08:20:48,338 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 4456 transitions. Word has length 68 [2020-10-14 08:20:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:48,339 INFO L479 AbstractCegarLoop]: Abstraction has 2748 states and 4456 transitions. [2020-10-14 08:20:48,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 4456 transitions. [2020-10-14 08:20:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:20:48,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:48,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:48,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:20:48,342 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1182974592, now seen corresponding path program 1 times [2020-10-14 08:20:48,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:48,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203261165] [2020-10-14 08:20:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:48,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:48,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:48,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:48,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:48,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:49,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:49,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:53,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:53,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:20:53,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:20:53,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:20:53,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:53,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:20:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:20:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:20:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:53,621 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:20:53,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:53,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:53,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:53,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:53,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:53,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:20:53,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:53,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:53,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:53,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:53,667 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 08:20:53,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203261165] [2020-10-14 08:20:53,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:53,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:20:53,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342753984] [2020-10-14 08:20:53,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:20:53,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:53,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:20:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:53,670 INFO L87 Difference]: Start difference. First operand 2748 states and 4456 transitions. Second operand 5 states. [2020-10-14 08:20:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:54,937 INFO L93 Difference]: Finished difference Result 7896 states and 12862 transitions. [2020-10-14 08:20:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:54,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-14 08:20:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:54,966 INFO L225 Difference]: With dead ends: 7896 [2020-10-14 08:20:54,966 INFO L226 Difference]: Without dead ends: 5307 [2020-10-14 08:20:54,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:20:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5307 states. [2020-10-14 08:20:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5307 to 5305. [2020-10-14 08:20:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5305 states. [2020-10-14 08:20:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5305 states to 5305 states and 8561 transitions. [2020-10-14 08:20:55,360 INFO L78 Accepts]: Start accepts. Automaton has 5305 states and 8561 transitions. Word has length 69 [2020-10-14 08:20:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:55,361 INFO L479 AbstractCegarLoop]: Abstraction has 5305 states and 8561 transitions. [2020-10-14 08:20:55,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:20:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5305 states and 8561 transitions. [2020-10-14 08:20:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:20:55,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:55,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:55,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:20:55,363 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:55,363 INFO L82 PathProgramCache]: Analyzing trace with hash -492781771, now seen corresponding path program 1 times [2020-10-14 08:20:55,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:55,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242527128] [2020-10-14 08:20:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:55,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:55,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:55,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:55,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:55,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:58,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:00,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:00,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:21:00,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:00,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:21:00,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:00,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:21:00,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:21:00,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:00,564 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:00,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:00,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:00,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:00,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:00,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:00,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:21:00,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:00,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:00,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:00,586 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 08:21:00,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242527128] [2020-10-14 08:21:00,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:00,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:00,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233795621] [2020-10-14 08:21:00,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:00,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:00,588 INFO L87 Difference]: Start difference. First operand 5305 states and 8561 transitions. Second operand 4 states. [2020-10-14 08:21:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:01,573 INFO L93 Difference]: Finished difference Result 15833 states and 25547 transitions. [2020-10-14 08:21:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:21:01,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:21:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:01,617 INFO L225 Difference]: With dead ends: 15833 [2020-10-14 08:21:01,617 INFO L226 Difference]: Without dead ends: 10575 [2020-10-14 08:21:01,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10575 states. [2020-10-14 08:21:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10575 to 5317. [2020-10-14 08:21:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5317 states. [2020-10-14 08:21:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 8577 transitions. [2020-10-14 08:21:02,066 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 8577 transitions. Word has length 70 [2020-10-14 08:21:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:02,067 INFO L479 AbstractCegarLoop]: Abstraction has 5317 states and 8577 transitions. [2020-10-14 08:21:02,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 8577 transitions. [2020-10-14 08:21:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:21:02,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:02,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:02,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:21:02,069 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1550216662, now seen corresponding path program 1 times [2020-10-14 08:21:02,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:02,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656713917] [2020-10-14 08:21:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:02,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:02,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:02,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:02,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:02,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:04,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:07,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:07,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:21:07,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:21:07,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:21:07,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:07,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:21:07,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 08:21:07,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:07,325 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:07,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:07,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:07,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:07,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:07,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:07,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:21:07,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:07,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:07,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:07,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:07,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:07,346 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 08:21:07,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656713917] [2020-10-14 08:21:07,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:07,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:07,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611627818] [2020-10-14 08:21:07,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:07,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:07,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:07,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:07,348 INFO L87 Difference]: Start difference. First operand 5317 states and 8577 transitions. Second operand 4 states. [2020-10-14 08:21:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:08,683 INFO L93 Difference]: Finished difference Result 15293 states and 24775 transitions. [2020-10-14 08:21:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:21:08,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 08:21:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:08,709 INFO L225 Difference]: With dead ends: 15293 [2020-10-14 08:21:08,709 INFO L226 Difference]: Without dead ends: 10235 [2020-10-14 08:21:08,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2020-10-14 08:21:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 10233. [2020-10-14 08:21:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10233 states. [2020-10-14 08:21:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 16419 transitions. [2020-10-14 08:21:09,344 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 16419 transitions. Word has length 71 [2020-10-14 08:21:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:09,344 INFO L479 AbstractCegarLoop]: Abstraction has 10233 states and 16419 transitions. [2020-10-14 08:21:09,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 16419 transitions. [2020-10-14 08:21:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:21:09,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:09,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:09,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:21:09,347 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash 341159213, now seen corresponding path program 1 times [2020-10-14 08:21:09,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:09,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570390994] [2020-10-14 08:21:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:09,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:10,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:11,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:11,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:14,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:14,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:21:14,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:21:14,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:21:14,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:14,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:14,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:21:14,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:21:14,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 08:21:14,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:14,600 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:14,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:14,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:14,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:14,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:14,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:14,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:21:14,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:14,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:14,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:14,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:14,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:14,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:14,631 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 08:21:14,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570390994] [2020-10-14 08:21:14,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:14,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:21:14,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296411621] [2020-10-14 08:21:14,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:21:14,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:14,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:21:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:14,634 INFO L87 Difference]: Start difference. First operand 10233 states and 16419 transitions. Second operand 5 states. [2020-10-14 08:21:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:16,646 INFO L93 Difference]: Finished difference Result 29469 states and 47491 transitions. [2020-10-14 08:21:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:16,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-14 08:21:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:16,692 INFO L225 Difference]: With dead ends: 29469 [2020-10-14 08:21:16,692 INFO L226 Difference]: Without dead ends: 19543 [2020-10-14 08:21:16,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:21:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19543 states. [2020-10-14 08:21:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19543 to 19541. [2020-10-14 08:21:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19541 states. [2020-10-14 08:21:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19541 states to 19541 states and 31247 transitions. [2020-10-14 08:21:18,034 INFO L78 Accepts]: Start accepts. Automaton has 19541 states and 31247 transitions. Word has length 71 [2020-10-14 08:21:18,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:18,034 INFO L479 AbstractCegarLoop]: Abstraction has 19541 states and 31247 transitions. [2020-10-14 08:21:18,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:21:18,034 INFO L276 IsEmpty]: Start isEmpty. Operand 19541 states and 31247 transitions. [2020-10-14 08:21:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:21:18,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:18,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:18,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:21:18,038 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:18,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1570471009, now seen corresponding path program 1 times [2020-10-14 08:21:18,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:18,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104309560] [2020-10-14 08:21:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:18,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:18,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:18,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:18,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:18,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:19,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:23,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:23,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:21:23,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:23,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:21:23,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:23,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:23,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:21:23,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:21:23,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 08:21:23,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:23,285 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:23,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:23,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:23,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:23,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:23,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:21:23,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:23,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:23,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:23,312 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 08:21:23,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104309560] [2020-10-14 08:21:23,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:23,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:21:23,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426914875] [2020-10-14 08:21:23,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:21:23,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:23,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:21:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:23,314 INFO L87 Difference]: Start difference. First operand 19541 states and 31247 transitions. Second operand 5 states. [2020-10-14 08:21:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:25,706 INFO L93 Difference]: Finished difference Result 38934 states and 62297 transitions. [2020-10-14 08:21:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:25,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-14 08:21:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:25,735 INFO L225 Difference]: With dead ends: 38934 [2020-10-14 08:21:25,735 INFO L226 Difference]: Without dead ends: 19872 [2020-10-14 08:21:25,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:21:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19872 states. [2020-10-14 08:21:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19872 to 19738. [2020-10-14 08:21:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19738 states. [2020-10-14 08:21:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19738 states to 19738 states and 31480 transitions. [2020-10-14 08:21:28,044 INFO L78 Accepts]: Start accepts. Automaton has 19738 states and 31480 transitions. Word has length 71 [2020-10-14 08:21:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:28,045 INFO L479 AbstractCegarLoop]: Abstraction has 19738 states and 31480 transitions. [2020-10-14 08:21:28,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:21:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 19738 states and 31480 transitions. [2020-10-14 08:21:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 08:21:28,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:28,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:28,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:21:28,049 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash 814614678, now seen corresponding path program 1 times [2020-10-14 08:21:28,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:28,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089902327] [2020-10-14 08:21:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:28,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:30,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:33,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:33,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 08:21:33,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:33,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:21:33,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:33,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:33,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:21:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:21:33,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:33,241 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:33,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:33,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:33,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:33,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:33,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:33,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:21:33,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:33,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:33,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:33,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:33,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:33,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:33,266 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 08:21:33,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089902327] [2020-10-14 08:21:33,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:33,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:33,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206045026] [2020-10-14 08:21:33,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:33,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:33,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:33,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:33,269 INFO L87 Difference]: Start difference. First operand 19738 states and 31480 transitions. Second operand 4 states. [2020-10-14 08:21:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:36,570 INFO L93 Difference]: Finished difference Result 58919 states and 94059 transitions. [2020-10-14 08:21:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:21:36,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-14 08:21:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:36,627 INFO L225 Difference]: With dead ends: 58919 [2020-10-14 08:21:36,627 INFO L226 Difference]: Without dead ends: 39440 [2020-10-14 08:21:36,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39440 states. [2020-10-14 08:21:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39440 to 19741. [2020-10-14 08:21:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19741 states. [2020-10-14 08:21:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19741 states to 19741 states and 31484 transitions. [2020-10-14 08:21:38,503 INFO L78 Accepts]: Start accepts. Automaton has 19741 states and 31484 transitions. Word has length 72 [2020-10-14 08:21:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:38,503 INFO L479 AbstractCegarLoop]: Abstraction has 19741 states and 31484 transitions. [2020-10-14 08:21:38,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 19741 states and 31484 transitions. [2020-10-14 08:21:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:21:38,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:38,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:38,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:21:38,507 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1815120194, now seen corresponding path program 1 times [2020-10-14 08:21:38,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:38,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328469828] [2020-10-14 08:21:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:38,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:38,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:38,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:38,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:38,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:43,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:43,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:21:43,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:43,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:21:43,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:43,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:21:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:21:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:21:43,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:43,718 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:43,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:43,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:43,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:43,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:43,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:43,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:21:43,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:43,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:43,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:43,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:43,739 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 08:21:43,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328469828] [2020-10-14 08:21:43,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:43,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:21:43,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003160897] [2020-10-14 08:21:43,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:21:43,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:21:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:21:43,741 INFO L87 Difference]: Start difference. First operand 19741 states and 31484 transitions. Second operand 6 states. [2020-10-14 08:21:43,943 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-14 08:21:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:50,650 INFO L93 Difference]: Finished difference Result 99817 states and 162650 transitions. [2020-10-14 08:21:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:21:50,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-14 08:21:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:50,757 INFO L225 Difference]: With dead ends: 99817 [2020-10-14 08:21:50,757 INFO L226 Difference]: Without dead ends: 81095 [2020-10-14 08:21:50,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:21:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81095 states. [2020-10-14 08:21:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81095 to 37229. [2020-10-14 08:21:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37229 states. [2020-10-14 08:21:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37229 states to 37229 states and 59292 transitions. [2020-10-14 08:21:54,134 INFO L78 Accepts]: Start accepts. Automaton has 37229 states and 59292 transitions. Word has length 73 [2020-10-14 08:21:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:54,134 INFO L479 AbstractCegarLoop]: Abstraction has 37229 states and 59292 transitions. [2020-10-14 08:21:54,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:21:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 37229 states and 59292 transitions. [2020-10-14 08:21:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 08:21:54,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:54,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:54,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:21:54,138 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:54,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash -495761630, now seen corresponding path program 1 times [2020-10-14 08:21:54,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:54,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196447155] [2020-10-14 08:21:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:54,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:54,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:59,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:59,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 08:21:59,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:59,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:21:59,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:59,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:21:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:21:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:21:59,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:59,337 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:21:59,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:59,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:59,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:59,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:59,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:59,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:21:59,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:59,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:59,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:59,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:59,359 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 08:21:59,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196447155] [2020-10-14 08:21:59,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:59,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:21:59,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997802991] [2020-10-14 08:21:59,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:21:59,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:59,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:21:59,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:59,361 INFO L87 Difference]: Start difference. First operand 37229 states and 59292 transitions. Second operand 5 states. [2020-10-14 08:21:59,552 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:22:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:06,493 INFO L93 Difference]: Finished difference Result 120563 states and 194623 transitions. [2020-10-14 08:22:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:22:06,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 08:22:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:06,616 INFO L225 Difference]: With dead ends: 120563 [2020-10-14 08:22:06,616 INFO L226 Difference]: Without dead ends: 84353 [2020-10-14 08:22:06,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:22:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84353 states. [2020-10-14 08:22:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84353 to 60517. [2020-10-14 08:22:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60517 states. [2020-10-14 08:22:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60517 states to 60517 states and 96572 transitions. [2020-10-14 08:22:13,134 INFO L78 Accepts]: Start accepts. Automaton has 60517 states and 96572 transitions. Word has length 74 [2020-10-14 08:22:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:13,134 INFO L479 AbstractCegarLoop]: Abstraction has 60517 states and 96572 transitions. [2020-10-14 08:22:13,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:22:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 60517 states and 96572 transitions. [2020-10-14 08:22:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 08:22:13,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:13,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:13,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:22:13,138 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1754206213, now seen corresponding path program 1 times [2020-10-14 08:22:13,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:13,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692796577] [2020-10-14 08:22:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:13,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:13,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:18,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:18,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 08:22:18,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:18,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:22:18,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:18,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:18,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:18,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:22:18,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:22:18,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:18,349 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:18,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:18,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:18,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:18,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:18,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:18,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:22:18,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:18,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:18,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:18,369 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 08:22:18,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692796577] [2020-10-14 08:22:18,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:18,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:18,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398067628] [2020-10-14 08:22:18,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:18,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:18,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:18,371 INFO L87 Difference]: Start difference. First operand 60517 states and 96572 transitions. Second operand 5 states. [2020-10-14 08:22:18,566 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:22:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:31,629 INFO L93 Difference]: Finished difference Result 193443 states and 310415 transitions. [2020-10-14 08:22:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:22:31,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-14 08:22:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:31,851 INFO L225 Difference]: With dead ends: 193443 [2020-10-14 08:22:31,851 INFO L226 Difference]: Without dead ends: 133945 [2020-10-14 08:22:31,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:22:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133945 states. [2020-10-14 08:22:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133945 to 96797. [2020-10-14 08:22:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96797 states. [2020-10-14 08:22:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96797 states to 96797 states and 153668 transitions. [2020-10-14 08:22:40,542 INFO L78 Accepts]: Start accepts. Automaton has 96797 states and 153668 transitions. Word has length 75 [2020-10-14 08:22:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:40,542 INFO L479 AbstractCegarLoop]: Abstraction has 96797 states and 153668 transitions. [2020-10-14 08:22:40,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:22:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 96797 states and 153668 transitions. [2020-10-14 08:22:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 08:22:40,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:40,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:40,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:22:40,546 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:40,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1506676663, now seen corresponding path program 1 times [2020-10-14 08:22:40,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:40,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562339684] [2020-10-14 08:22:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:40,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:40,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:40,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:40,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:40,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:40,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:40,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:45,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:45,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 08:22:45,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:22:45,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-14 08:22:45,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:45,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:45,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:22:45,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 08:22:45,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:45,782 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:22:45,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:45,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:45,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:45,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:45,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:45,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:22:45,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:45,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:45,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:45,801 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 08:22:45,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562339684] [2020-10-14 08:22:45,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:45,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:45,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442160080] [2020-10-14 08:22:45,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:45,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:45,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:45,803 INFO L87 Difference]: Start difference. First operand 96797 states and 153668 transitions. Second operand 5 states. [2020-10-14 08:22:45,993 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 08:23:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:04,313 INFO L93 Difference]: Finished difference Result 302915 states and 482687 transitions. [2020-10-14 08:23:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:23:04,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 08:23:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:04,663 INFO L225 Difference]: With dead ends: 302915 [2020-10-14 08:23:04,663 INFO L226 Difference]: Without dead ends: 207137 [2020-10-14 08:23:04,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:23:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207137 states. [2020-10-14 08:23:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207137 to 151309. [2020-10-14 08:23:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151309 states. [2020-10-14 08:23:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151309 states to 151309 states and 238684 transitions. [2020-10-14 08:23:21,626 INFO L78 Accepts]: Start accepts. Automaton has 151309 states and 238684 transitions. Word has length 76 [2020-10-14 08:23:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:21,626 INFO L479 AbstractCegarLoop]: Abstraction has 151309 states and 238684 transitions. [2020-10-14 08:23:21,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 151309 states and 238684 transitions. [2020-10-14 08:23:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 08:23:21,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:21,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:23:21,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:23:21,629 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2001930023, now seen corresponding path program 1 times [2020-10-14 08:23:21,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:21,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942728023] [2020-10-14 08:23:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:21,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:21,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:21,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:21,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:26,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:26,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 08:23:26,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:23:26,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:23:26,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:26,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:26,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:23:26,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:23:26,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 08:23:26,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:26,866 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 08:23:26,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:26,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:26,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:26,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:26,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:26,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:23:26,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:26,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:26,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:26,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:26,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:26,889 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 08:23:26,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942728023] [2020-10-14 08:23:26,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:26,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:23:26,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842692373] [2020-10-14 08:23:26,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:23:26,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:26,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:23:26,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:23:26,891 INFO L87 Difference]: Start difference. First operand 151309 states and 238684 transitions. Second operand 6 states. [2020-10-14 08:23:27,136 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 168