/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:09:54,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:09:54,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:09:54,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:09:54,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:09:54,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:09:54,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:09:54,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:09:54,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:09:54,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:09:54,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:09:54,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:09:54,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:09:54,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:09:54,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:09:54,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:09:54,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:09:54,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:09:54,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:09:54,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:09:54,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:09:54,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:09:54,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:09:54,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:09:54,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:09:54,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:09:54,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:09:54,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:09:54,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:09:54,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:09:54,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:09:54,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:09:54,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:09:54,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:09:54,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:09:54,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:09:54,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:09:54,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:09:54,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:09:54,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:09:54,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:09:54,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 15:09:54,564 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:09:54,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:09:54,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:09:54,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:09:54,566 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:09:54,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:09:54,567 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:09:54,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:09:54,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:09:54,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:09:54,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:09:54,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:09:54,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:09:54,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:09:54,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:09:54,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:09:54,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:09:54,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:09:54,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:09:54,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:09:54,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:09:54,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:09:54,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:09:54,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:09:54,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:09:54,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:09:54,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:09:54,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:09:54,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:09:54,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 15:09:54,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:09:54,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:09:54,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:09:54,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:09:54,883 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:09:54,884 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:09:54,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f61e7a7de/770cd14ee0d040ada304bfde4d223c1a/FLAG18b2b918c [2020-10-13 15:09:55,679 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:09:55,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:09:55,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f61e7a7de/770cd14ee0d040ada304bfde4d223c1a/FLAG18b2b918c [2020-10-13 15:09:55,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f61e7a7de/770cd14ee0d040ada304bfde4d223c1a [2020-10-13 15:09:55,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:09:55,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:09:55,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:09:55,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:09:55,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:09:55,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:09:55" (1/1) ... [2020-10-13 15:09:55,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368a0f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:55, skipping insertion in model container [2020-10-13 15:09:55,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:09:55" (1/1) ... [2020-10-13 15:09:55,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:09:56,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:09:57,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:09:57,681 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:09:59,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:09:59,374 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:09:59,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59 WrapperNode [2020-10-13 15:09:59,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:09:59,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:09:59,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:09:59,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:09:59,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (1/1) ... [2020-10-13 15:09:59,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (1/1) ... [2020-10-13 15:09:59,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (1/1) ... [2020-10-13 15:09:59,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (1/1) ... [2020-10-13 15:09:59,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (1/1) ... [2020-10-13 15:09:59,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (1/1) ... [2020-10-13 15:09:59,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (1/1) ... [2020-10-13 15:09:59,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:09:59,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:09:59,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:09:59,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:09:59,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:09:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:09:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:09:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:09:59,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:09:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:09:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 15:09:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 15:09:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 15:09:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:09:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:09:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 15:09:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 15:09:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 15:09:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 15:09:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 15:09:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 15:09:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 15:09:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 15:09:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 15:09:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:09:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:09:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:10:03,988 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:10:03,989 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 15:10:04,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:10:04 BoogieIcfgContainer [2020-10-13 15:10:04,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:10:04,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:10:04,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:10:04,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:10:04,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:09:55" (1/3) ... [2020-10-13 15:10:04,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7002b964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:10:04, skipping insertion in model container [2020-10-13 15:10:04,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:09:59" (2/3) ... [2020-10-13 15:10:04,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7002b964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:10:04, skipping insertion in model container [2020-10-13 15:10:04,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:10:04" (3/3) ... [2020-10-13 15:10:04,009 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-13 15:10:04,018 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:10:04,027 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:10:04,039 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:10:04,067 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:10:04,068 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:10:04,068 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:10:04,068 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:10:04,068 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:10:04,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:10:04,068 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:10:04,068 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:10:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-10-13 15:10:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-13 15:10:04,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:04,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:04,159 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-10-13 15:10:04,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:04,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949652613] [2020-10-13 15:10:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:07,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:09,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:10,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:11,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:11,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:11,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 493 [2020-10-13 15:10:11,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 15:10:11,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5241 [2020-10-13 15:10:11,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:11,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:10:11,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:10:11,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-13 15:10:11,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 15:10:12,877 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:10:12,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:10:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:12,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:12,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:12,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:10:12,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:10:12,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 15:10:12,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:10:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:10:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:10:12,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:10:13,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949652613] [2020-10-13 15:10:13,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:10:13,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:10:13,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048632270] [2020-10-13 15:10:13,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:10:13,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:10:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:10:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:10:13,328 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 5 states. [2020-10-13 15:10:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:10:31,294 INFO L93 Difference]: Finished difference Result 4172 states and 7512 transitions. [2020-10-13 15:10:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 15:10:31,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-10-13 15:10:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:10:31,334 INFO L225 Difference]: With dead ends: 4172 [2020-10-13 15:10:31,334 INFO L226 Difference]: Without dead ends: 2814 [2020-10-13 15:10:31,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:10:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-10-13 15:10:31,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2020-10-13 15:10:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-10-13 15:10:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4642 transitions. [2020-10-13 15:10:31,603 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4642 transitions. Word has length 487 [2020-10-13 15:10:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:10:31,605 INFO L479 AbstractCegarLoop]: Abstraction has 2812 states and 4642 transitions. [2020-10-13 15:10:31,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:10:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4642 transitions. [2020-10-13 15:10:31,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-13 15:10:31,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:31,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:31,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:10:31,623 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times [2020-10-13 15:10:31,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:31,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534194078] [2020-10-13 15:10:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:31,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:32,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:33,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:33,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:34,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:34,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:34,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:35,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:35,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:36,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:36,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:36,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 495 [2020-10-13 15:10:36,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:10:36,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5154 [2020-10-13 15:10:36,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:10:36,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:10:36,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-13 15:10:36,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 15:10:38,486 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:10:38,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:10:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:38,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:38,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:38,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:10:38,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:10:38,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 15:10:38,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:10:38,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:10:38,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:10:38,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:10:39,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534194078] [2020-10-13 15:10:39,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:10:39,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:10:39,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920801127] [2020-10-13 15:10:39,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:10:39,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:10:39,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:10:39,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:10:39,015 INFO L87 Difference]: Start difference. First operand 2812 states and 4642 transitions. Second operand 5 states. [2020-10-13 15:10:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:10:53,314 INFO L93 Difference]: Finished difference Result 8344 states and 13773 transitions. [2020-10-13 15:10:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:10:53,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 489 [2020-10-13 15:10:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:10:53,344 INFO L225 Difference]: With dead ends: 8344 [2020-10-13 15:10:53,345 INFO L226 Difference]: Without dead ends: 5550 [2020-10-13 15:10:53,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:10:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2020-10-13 15:10:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5548. [2020-10-13 15:10:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5548 states. [2020-10-13 15:10:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5548 states to 5548 states and 9119 transitions. [2020-10-13 15:10:53,625 INFO L78 Accepts]: Start accepts. Automaton has 5548 states and 9119 transitions. Word has length 489 [2020-10-13 15:10:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:10:53,627 INFO L479 AbstractCegarLoop]: Abstraction has 5548 states and 9119 transitions. [2020-10-13 15:10:53,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:10:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 5548 states and 9119 transitions. [2020-10-13 15:10:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-13 15:10:53,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:10:53,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:10:53,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:10:53,648 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:10:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:10:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1329199647, now seen corresponding path program 1 times [2020-10-13 15:10:53,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:10:53,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804877343] [2020-10-13 15:10:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:10:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:54,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:54,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:54,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:55,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:56,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:56,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:58,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:58,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 499 [2020-10-13 15:10:58,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 15:10:58,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 15:10:58,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:58,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:10:58,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:10:58,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-13 15:10:58,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:10:59,950 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:10:59,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:10:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:10:59,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:10:59,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:10:59,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:10:59,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:10:59,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 15:10:59,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:10:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:10:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:10:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:10:59,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:11:00,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804877343] [2020-10-13 15:11:00,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:11:00,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:11:00,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953829206] [2020-10-13 15:11:00,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:11:00,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:11:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:11:00,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:11:00,330 INFO L87 Difference]: Start difference. First operand 5548 states and 9119 transitions. Second operand 5 states. [2020-10-13 15:11:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:11:15,208 INFO L93 Difference]: Finished difference Result 16469 states and 27061 transitions. [2020-10-13 15:11:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:11:15,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-10-13 15:11:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:11:15,257 INFO L225 Difference]: With dead ends: 16469 [2020-10-13 15:11:15,258 INFO L226 Difference]: Without dead ends: 10956 [2020-10-13 15:11:15,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:11:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10956 states. [2020-10-13 15:11:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10956 to 10954. [2020-10-13 15:11:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10954 states. [2020-10-13 15:11:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10954 states to 10954 states and 17922 transitions. [2020-10-13 15:11:15,829 INFO L78 Accepts]: Start accepts. Automaton has 10954 states and 17922 transitions. Word has length 493 [2020-10-13 15:11:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:11:15,831 INFO L479 AbstractCegarLoop]: Abstraction has 10954 states and 17922 transitions. [2020-10-13 15:11:15,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:11:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 10954 states and 17922 transitions. [2020-10-13 15:11:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-10-13 15:11:15,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:11:15,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:11:15,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:11:15,866 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:11:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:11:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash 985173439, now seen corresponding path program 1 times [2020-10-13 15:11:15,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:11:15,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009314462] [2020-10-13 15:11:15,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:11:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:15,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:16,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:17,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:18,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:18,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:18,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:18,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:19,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:20,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:20,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 502 [2020-10-13 15:11:20,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 15:11:20,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 15:11:20,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:20,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:11:20,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 15:11:20,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:11:20,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:22,341 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:11:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:11:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:22,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:22,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:11:22,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:11:22,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 15:11:22,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:22,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:11:22,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:11:22,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:11:22,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:11:22,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009314462] [2020-10-13 15:11:22,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:11:22,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:11:22,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731214693] [2020-10-13 15:11:22,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:11:22,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:11:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:11:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:11:22,534 INFO L87 Difference]: Start difference. First operand 10954 states and 17922 transitions. Second operand 4 states. [2020-10-13 15:11:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:11:42,766 INFO L93 Difference]: Finished difference Result 32723 states and 53530 transitions. [2020-10-13 15:11:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:11:42,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-10-13 15:11:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:11:42,830 INFO L225 Difference]: With dead ends: 32723 [2020-10-13 15:11:42,830 INFO L226 Difference]: Without dead ends: 21835 [2020-10-13 15:11:42,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:11:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21835 states. [2020-10-13 15:11:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21835 to 11017. [2020-10-13 15:11:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11017 states. [2020-10-13 15:11:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11017 states to 11017 states and 18007 transitions. [2020-10-13 15:11:43,427 INFO L78 Accepts]: Start accepts. Automaton has 11017 states and 18007 transitions. Word has length 496 [2020-10-13 15:11:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:11:43,428 INFO L479 AbstractCegarLoop]: Abstraction has 11017 states and 18007 transitions. [2020-10-13 15:11:43,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:11:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 11017 states and 18007 transitions. [2020-10-13 15:11:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-10-13 15:11:43,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:11:43,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:11:43,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:11:43,450 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:11:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:11:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1705424078, now seen corresponding path program 1 times [2020-10-13 15:11:43,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:11:43,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911232358] [2020-10-13 15:11:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:11:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:43,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:43,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:44,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:44,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:44,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:44,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:44,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:45,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:45,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:45,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:46,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:46,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:47,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:47,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:47,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:47,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:48,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:48,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:48,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:48,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 503 [2020-10-13 15:11:48,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 15:11:48,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 15:11:48,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:11:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-10-13 15:11:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 15:11:48,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:49,488 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:11:49,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:11:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:11:49,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:11:49,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:11:49,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:11:49,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:11:49,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-13 15:11:49,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:11:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:11:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:11:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:11:49,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:11:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:11:49,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911232358] [2020-10-13 15:11:49,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:11:49,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:11:49,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999470845] [2020-10-13 15:11:49,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:11:49,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:11:49,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:11:49,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:11:49,716 INFO L87 Difference]: Start difference. First operand 11017 states and 18007 transitions. Second operand 4 states. [2020-10-13 15:12:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:12:02,842 INFO L93 Difference]: Finished difference Result 21392 states and 34508 transitions. [2020-10-13 15:12:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:12:02,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-10-13 15:12:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:12:02,885 INFO L225 Difference]: With dead ends: 21392 [2020-10-13 15:12:02,886 INFO L226 Difference]: Without dead ends: 14773 [2020-10-13 15:12:02,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:12:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14773 states. [2020-10-13 15:12:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14773 to 12571. [2020-10-13 15:12:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12571 states. [2020-10-13 15:12:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12571 states to 12571 states and 20593 transitions. [2020-10-13 15:12:03,453 INFO L78 Accepts]: Start accepts. Automaton has 12571 states and 20593 transitions. Word has length 497 [2020-10-13 15:12:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:12:03,453 INFO L479 AbstractCegarLoop]: Abstraction has 12571 states and 20593 transitions. [2020-10-13 15:12:03,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:12:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 12571 states and 20593 transitions. [2020-10-13 15:12:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-13 15:12:03,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:03,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:12:03,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:12:03,467 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:03,468 INFO L82 PathProgramCache]: Analyzing trace with hash 532673534, now seen corresponding path program 1 times [2020-10-13 15:12:03,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:03,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364643793] [2020-10-13 15:12:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:04,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:04,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:05,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:05,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:05,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:05,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:08,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:08,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-10-13 15:12:08,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 15:12:08,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-13 15:12:08,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:08,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:12:08,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 15:12:08,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 15:12:08,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:12:09,771 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:12:09,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:12:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:09,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:09,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:09,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:12:09,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:12:09,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:12:09,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:09,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:12:09,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:12:09,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:12:09,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:12:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:12:09,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364643793] [2020-10-13 15:12:09,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:12:09,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:12:09,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111908061] [2020-10-13 15:12:09,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:12:09,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:12:09,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:12:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:12:09,970 INFO L87 Difference]: Start difference. First operand 12571 states and 20593 transitions. Second operand 5 states. [2020-10-13 15:12:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:12:30,033 INFO L93 Difference]: Finished difference Result 36211 states and 59115 transitions. [2020-10-13 15:12:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:12:30,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-10-13 15:12:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:12:30,080 INFO L225 Difference]: With dead ends: 36211 [2020-10-13 15:12:30,081 INFO L226 Difference]: Without dead ends: 24919 [2020-10-13 15:12:30,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:12:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24919 states. [2020-10-13 15:12:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24919 to 13779. [2020-10-13 15:12:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13779 states. [2020-10-13 15:12:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13779 states to 13779 states and 22781 transitions. [2020-10-13 15:12:30,813 INFO L78 Accepts]: Start accepts. Automaton has 13779 states and 22781 transitions. Word has length 499 [2020-10-13 15:12:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:12:30,813 INFO L479 AbstractCegarLoop]: Abstraction has 13779 states and 22781 transitions. [2020-10-13 15:12:30,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:12:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 13779 states and 22781 transitions. [2020-10-13 15:12:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-13 15:12:30,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:30,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:12:30,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:12:30,829 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:30,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1583669253, now seen corresponding path program 1 times [2020-10-13 15:12:30,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:30,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142846915] [2020-10-13 15:12:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:31,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:31,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:31,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:31,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:31,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:32,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:32,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:32,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:32,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:33,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:33,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:33,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:33,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:33,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:34,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:34,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:34,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:35,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:35,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-10-13 15:12:35,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 15:12:35,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 15:12:35,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:12:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:12:36,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 15:12:36,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:12:36,975 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:12:36,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:12:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:36,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:12:36,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:12:36,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:12:36,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:12:36,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:12:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:12:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:12:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:12:36,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:12:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:12:37,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142846915] [2020-10-13 15:12:37,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:12:37,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:12:37,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400451991] [2020-10-13 15:12:37,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:12:37,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:12:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:12:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:12:37,167 INFO L87 Difference]: Start difference. First operand 13779 states and 22781 transitions. Second operand 5 states. [2020-10-13 15:12:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:12:58,479 INFO L93 Difference]: Finished difference Result 38895 states and 63933 transitions. [2020-10-13 15:12:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:12:58,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-10-13 15:12:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:12:58,522 INFO L225 Difference]: With dead ends: 38895 [2020-10-13 15:12:58,523 INFO L226 Difference]: Without dead ends: 27411 [2020-10-13 15:12:58,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:12:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27411 states. [2020-10-13 15:12:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27411 to 16303. [2020-10-13 15:12:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16303 states. [2020-10-13 15:12:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 27311 transitions. [2020-10-13 15:12:59,411 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 27311 transitions. Word has length 499 [2020-10-13 15:12:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:12:59,412 INFO L479 AbstractCegarLoop]: Abstraction has 16303 states and 27311 transitions. [2020-10-13 15:12:59,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:12:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 27311 transitions. [2020-10-13 15:12:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-10-13 15:12:59,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:12:59,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:12:59,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:12:59,432 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:12:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:12:59,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1016842434, now seen corresponding path program 1 times [2020-10-13 15:12:59,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:12:59,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484163949] [2020-10-13 15:12:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:12:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:12:59,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:59,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:12:59,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:00,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:00,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:00,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:00,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:01,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:02,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:02,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:02,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:02,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:02,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:02,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:03,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:04,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:04,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-10-13 15:13:04,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 15:13:04,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 15:13:04,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:13:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:13:04,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-13 15:13:04,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:05,542 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:13:05,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:05,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:05,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:05,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:05,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:05,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:13:05,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:05,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:05,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:05,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:05,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:13:05,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484163949] [2020-10-13 15:13:05,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:05,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:13:05,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056500282] [2020-10-13 15:13:05,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:13:05,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:05,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:13:05,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:13:05,828 INFO L87 Difference]: Start difference. First operand 16303 states and 27311 transitions. Second operand 5 states. [2020-10-13 15:13:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:13:23,644 INFO L93 Difference]: Finished difference Result 46894 states and 78410 transitions. [2020-10-13 15:13:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:13:23,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 499 [2020-10-13 15:13:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:13:23,693 INFO L225 Difference]: With dead ends: 46894 [2020-10-13 15:13:23,693 INFO L226 Difference]: Without dead ends: 30833 [2020-10-13 15:13:23,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:13:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30833 states. [2020-10-13 15:13:25,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30833 to 30831. [2020-10-13 15:13:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30831 states. [2020-10-13 15:13:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30831 states to 30831 states and 51251 transitions. [2020-10-13 15:13:25,439 INFO L78 Accepts]: Start accepts. Automaton has 30831 states and 51251 transitions. Word has length 499 [2020-10-13 15:13:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:13:25,439 INFO L479 AbstractCegarLoop]: Abstraction has 30831 states and 51251 transitions. [2020-10-13 15:13:25,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:13:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30831 states and 51251 transitions. [2020-10-13 15:13:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-10-13 15:13:25,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:13:25,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:13:25,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:13:25,468 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:13:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:13:25,468 INFO L82 PathProgramCache]: Analyzing trace with hash -280185248, now seen corresponding path program 1 times [2020-10-13 15:13:25,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:13:25,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315592050] [2020-10-13 15:13:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:13:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:25,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:25,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:26,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:26,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:26,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:26,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:26,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:27,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:27,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:27,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:27,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:28,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:28,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:28,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:29,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:29,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:29,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:30,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:30,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 508 [2020-10-13 15:13:30,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 15:13:30,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 15:13:30,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:30,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:13:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 15:13:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-13 15:13:30,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:31,521 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 403 [2020-10-13 15:13:31,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:13:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:13:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:13:31,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:13:31,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:13:31,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:13:31,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 15:13:31,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:13:31,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:13:31,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:13:31,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:13:31,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:13:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:13:31,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315592050] [2020-10-13 15:13:31,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:13:31,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:13:31,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276992365] [2020-10-13 15:13:31,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:13:31,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:13:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:13:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:13:31,942 INFO L87 Difference]: Start difference. First operand 30831 states and 51251 transitions. Second operand 4 states.