/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:54:59,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:54:59,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:54:59,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:54:59,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:54:59,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:54:59,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:54:59,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:54:59,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:54:59,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:54:59,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:54:59,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:54:59,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:54:59,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:54:59,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:54:59,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:54:59,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:54:59,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:54:59,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:54:59,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:54:59,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:54:59,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:54:59,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:54:59,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:54:59,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:54:59,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:54:59,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:54:59,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:54:59,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:54:59,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:54:59,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:54:59,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:54:59,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:54:59,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:54:59,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:54:59,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:54:59,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:54:59,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:54:59,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:54:59,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:54:59,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:54:59,595 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 [2020-10-12 19:54:59,617 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:54:59,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:54:59,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:54:59,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:54:59,619 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:54:59,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:54:59,620 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:54:59,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:54:59,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:54:59,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:54:59,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:54:59,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:54:59,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:54:59,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:54:59,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:54:59,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:54:59,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:54:59,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:54:59,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:54:59,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:54:59,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:54:59,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:54:59,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:54:59,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:54:59,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:54:59,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:54:59,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:54:59,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:54:59,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:54:59,625 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:54:59,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:54:59,981 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:54:59,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:54:59,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:54:59,986 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:54:59,987 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:55:00,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b58c1222c/9e33ec6ea4c248a3a6987d53b90b3a5e/FLAG69b9ba6e1 [2020-10-12 19:55:00,602 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:55:00,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:55:00,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b58c1222c/9e33ec6ea4c248a3a6987d53b90b3a5e/FLAG69b9ba6e1 [2020-10-12 19:55:00,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b58c1222c/9e33ec6ea4c248a3a6987d53b90b3a5e [2020-10-12 19:55:00,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:55:00,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:55:00,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:55:00,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:55:00,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:55:00,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:55:00" (1/1) ... [2020-10-12 19:55:00,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e093328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:00, skipping insertion in model container [2020-10-12 19:55:00,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:55:00" (1/1) ... [2020-10-12 19:55:00,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:55:01,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:55:01,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:55:01,421 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:55:01,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:55:01,561 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:55:01,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01 WrapperNode [2020-10-12 19:55:01,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:55:01,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:55:01,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:55:01,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:55:01,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (1/1) ... [2020-10-12 19:55:01,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (1/1) ... [2020-10-12 19:55:01,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (1/1) ... [2020-10-12 19:55:01,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (1/1) ... [2020-10-12 19:55:01,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (1/1) ... [2020-10-12 19:55:01,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (1/1) ... [2020-10-12 19:55:01,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (1/1) ... [2020-10-12 19:55:01,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:55:01,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:55:01,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:55:01,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:55:01,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (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 [2020-10-12 19:55:01,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:55:01,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:55:01,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:55:01,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:55:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:55:01,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:55:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:55:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:55:01,690 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:55:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:55:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:55:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:55:01,691 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:55:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:55:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:55:01,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:55:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:55:02,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:55:02,481 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:55:02,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:55:02 BoogieIcfgContainer [2020-10-12 19:55:02,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:55:02,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:55:02,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:55:02,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:55:02,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:55:00" (1/3) ... [2020-10-12 19:55:02,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fee2f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:55:02, skipping insertion in model container [2020-10-12 19:55:02,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:55:01" (2/3) ... [2020-10-12 19:55:02,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fee2f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:55:02, skipping insertion in model container [2020-10-12 19:55:02,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:55:02" (3/3) ... [2020-10-12 19:55:02,498 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:55:02,510 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:55:02,519 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:55:02,534 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:55:02,562 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:55:02,562 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:55:02,562 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:55:02,562 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:55:02,563 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:55:02,563 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:55:02,563 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:55:02,563 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:55:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-10-12 19:55:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 19:55:02,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:02,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:02,598 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1362834774, now seen corresponding path program 1 times [2020-10-12 19:55:02,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:02,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643551703] [2020-10-12 19:55:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:03,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:04,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:04,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 19:55:04,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:55:04,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1673 [2020-10-12 19:55:04,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:04,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:55:04,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:55:04,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 19:55:04,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:55:04,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:04,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:04,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:04,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:04,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:04,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:55:04,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:04,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:04,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:04,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643551703] [2020-10-12 19:55:04,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:04,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:04,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531609838] [2020-10-12 19:55:04,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:55:04,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:55:04,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:04,888 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 6 states. [2020-10-12 19:55:05,076 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:55:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:05,961 INFO L93 Difference]: Finished difference Result 476 states and 764 transitions. [2020-10-12 19:55:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:55:05,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-12 19:55:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:05,983 INFO L225 Difference]: With dead ends: 476 [2020-10-12 19:55:05,983 INFO L226 Difference]: Without dead ends: 397 [2020-10-12 19:55:05,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:55:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-12 19:55:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 235. [2020-10-12 19:55:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-12 19:55:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 351 transitions. [2020-10-12 19:55:06,069 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 351 transitions. Word has length 52 [2020-10-12 19:55:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:06,070 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 351 transitions. [2020-10-12 19:55:06,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:55:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 351 transitions. [2020-10-12 19:55:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:55:06,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:06,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:06,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:55:06,074 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:06,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2068505343, now seen corresponding path program 1 times [2020-10-12 19:55:06,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:06,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537257627] [2020-10-12 19:55:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:06,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:06,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:09,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:09,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:55:09,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:55:09,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3796 [2020-10-12 19:55:09,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:55:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:09,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:55:09,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:10,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:10,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:10,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:10,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:10,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:10,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:55:10,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:10,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:10,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:10,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:10,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:10,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537257627] [2020-10-12 19:55:10,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:10,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:55:10,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553331688] [2020-10-12 19:55:10,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:55:10,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:10,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:55:10,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:10,247 INFO L87 Difference]: Start difference. First operand 235 states and 351 transitions. Second operand 8 states. [2020-10-12 19:55:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:11,260 INFO L93 Difference]: Finished difference Result 819 states and 1257 transitions. [2020-10-12 19:55:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:55:11,261 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-12 19:55:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:11,266 INFO L225 Difference]: With dead ends: 819 [2020-10-12 19:55:11,266 INFO L226 Difference]: Without dead ends: 640 [2020-10-12 19:55:11,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:55:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-12 19:55:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 242. [2020-10-12 19:55:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-12 19:55:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 354 transitions. [2020-10-12 19:55:11,305 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 354 transitions. Word has length 55 [2020-10-12 19:55:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:11,305 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 354 transitions. [2020-10-12 19:55:11,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:55:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 354 transitions. [2020-10-12 19:55:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:55:11,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:11,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:11,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:55:11,309 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2084656831, now seen corresponding path program 1 times [2020-10-12 19:55:11,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:11,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122778964] [2020-10-12 19:55:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:11,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:11,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:11,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:11,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:11,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:14,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:14,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:55:14,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:55:14,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2988 [2020-10-12 19:55:14,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:14,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:55:14,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:14,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:55:14,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:14,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:14,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:14,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:14,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-12 19:55:14,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:14,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:14,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:14,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:14,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122778964] [2020-10-12 19:55:14,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:14,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:55:14,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892798906] [2020-10-12 19:55:14,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:55:14,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:14,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:55:14,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:14,572 INFO L87 Difference]: Start difference. First operand 242 states and 354 transitions. Second operand 8 states. [2020-10-12 19:55:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:15,603 INFO L93 Difference]: Finished difference Result 874 states and 1300 transitions. [2020-10-12 19:55:15,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:55:15,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-12 19:55:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:15,610 INFO L225 Difference]: With dead ends: 874 [2020-10-12 19:55:15,611 INFO L226 Difference]: Without dead ends: 797 [2020-10-12 19:55:15,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:55:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2020-10-12 19:55:15,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 293. [2020-10-12 19:55:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-12 19:55:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 427 transitions. [2020-10-12 19:55:15,661 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 427 transitions. Word has length 55 [2020-10-12 19:55:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:15,664 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 427 transitions. [2020-10-12 19:55:15,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:55:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 427 transitions. [2020-10-12 19:55:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 19:55:15,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:15,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:15,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:55:15,677 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:15,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash 63018877, now seen corresponding path program 1 times [2020-10-12 19:55:15,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:15,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013149756] [2020-10-12 19:55:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:15,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:15,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:15,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:15,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:16,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:18,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 19:55:18,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:55:18,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2343 [2020-10-12 19:55:18,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:18,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:55:18,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:18,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:55:18,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:18,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:18,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:18,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:18,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:18,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:55:18,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:18,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:18,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:18,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 19:55:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:18,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013149756] [2020-10-12 19:55:18,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:18,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:55:18,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140198328] [2020-10-12 19:55:18,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:55:18,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:55:18,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:18,347 INFO L87 Difference]: Start difference. First operand 293 states and 427 transitions. Second operand 8 states. [2020-10-12 19:55:18,486 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 19:55:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:19,422 INFO L93 Difference]: Finished difference Result 1233 states and 1849 transitions. [2020-10-12 19:55:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:55:19,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-12 19:55:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:19,428 INFO L225 Difference]: With dead ends: 1233 [2020-10-12 19:55:19,428 INFO L226 Difference]: Without dead ends: 1045 [2020-10-12 19:55:19,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:55:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-10-12 19:55:19,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 369. [2020-10-12 19:55:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-12 19:55:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 519 transitions. [2020-10-12 19:55:19,474 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 519 transitions. Word has length 55 [2020-10-12 19:55:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:19,475 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 519 transitions. [2020-10-12 19:55:19,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:55:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 519 transitions. [2020-10-12 19:55:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:55:19,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:19,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:19,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:55:19,478 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1001437705, now seen corresponding path program 1 times [2020-10-12 19:55:19,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:19,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27524557] [2020-10-12 19:55:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:19,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:19,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:20,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:20,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:21,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:21,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:24,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:24,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:55:24,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:55:24,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:55:24,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:24,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:55:24,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:24,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:55:24,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:24,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:24,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:24,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:24,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:24,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:24,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:55:24,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:24,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:24,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:24,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:24,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27524557] [2020-10-12 19:55:24,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:24,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:55:24,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111888577] [2020-10-12 19:55:24,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:55:24,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:55:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:24,815 INFO L87 Difference]: Start difference. First operand 369 states and 519 transitions. Second operand 11 states. [2020-10-12 19:55:27,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:27,874 INFO L93 Difference]: Finished difference Result 2691 states and 3967 transitions. [2020-10-12 19:55:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 19:55:27,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-12 19:55:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:27,889 INFO L225 Difference]: With dead ends: 2691 [2020-10-12 19:55:27,890 INFO L226 Difference]: Without dead ends: 2449 [2020-10-12 19:55:27,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=1367, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 19:55:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2020-10-12 19:55:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1245. [2020-10-12 19:55:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1245 states. [2020-10-12 19:55:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1832 transitions. [2020-10-12 19:55:28,032 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1832 transitions. Word has length 56 [2020-10-12 19:55:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:28,033 INFO L479 AbstractCegarLoop]: Abstraction has 1245 states and 1832 transitions. [2020-10-12 19:55:28,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:55:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1832 transitions. [2020-10-12 19:55:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 19:55:28,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:28,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:28,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:55:28,035 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash 185330120, now seen corresponding path program 1 times [2020-10-12 19:55:28,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:28,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144053336] [2020-10-12 19:55:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:28,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:28,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:30,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:32,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 19:55:32,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:55:32,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4876 [2020-10-12 19:55:32,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:32,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:55:32,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:32,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:55:32,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:33,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:33,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:33,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:33,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:33,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 19:55:33,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:33,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:33,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:33,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144053336] [2020-10-12 19:55:33,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:33,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:55:33,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666552293] [2020-10-12 19:55:33,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:55:33,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:33,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:55:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:33,190 INFO L87 Difference]: Start difference. First operand 1245 states and 1832 transitions. Second operand 11 states. [2020-10-12 19:55:33,363 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-12 19:55:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:37,262 INFO L93 Difference]: Finished difference Result 12781 states and 19196 transitions. [2020-10-12 19:55:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 19:55:37,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-12 19:55:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:37,321 INFO L225 Difference]: With dead ends: 12781 [2020-10-12 19:55:37,321 INFO L226 Difference]: Without dead ends: 11665 [2020-10-12 19:55:37,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 19:55:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11665 states. [2020-10-12 19:55:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11665 to 2147. [2020-10-12 19:55:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2020-10-12 19:55:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 3182 transitions. [2020-10-12 19:55:37,695 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 3182 transitions. Word has length 56 [2020-10-12 19:55:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:37,697 INFO L479 AbstractCegarLoop]: Abstraction has 2147 states and 3182 transitions. [2020-10-12 19:55:37,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:55:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 3182 transitions. [2020-10-12 19:55:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:55:37,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:37,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:37,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:55:37,700 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1839354297, now seen corresponding path program 1 times [2020-10-12 19:55:37,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:37,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187511675] [2020-10-12 19:55:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:37,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:37,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:37,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:37,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:42,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:42,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:55:42,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:55:42,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:55:42,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:42,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:55:42,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:55:42,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:55:42,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:43,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:43,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:43,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:43,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:43,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:43,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:55:43,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:43,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:43,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:43,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:43,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:43,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187511675] [2020-10-12 19:55:43,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:43,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:55:43,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031096817] [2020-10-12 19:55:43,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:55:43,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:43,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:55:43,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:43,059 INFO L87 Difference]: Start difference. First operand 2147 states and 3182 transitions. Second operand 11 states. [2020-10-12 19:55:43,335 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2020-10-12 19:55:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:46,806 INFO L93 Difference]: Finished difference Result 10015 states and 15011 transitions. [2020-10-12 19:55:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 19:55:46,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-12 19:55:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:46,847 INFO L225 Difference]: With dead ends: 10015 [2020-10-12 19:55:46,847 INFO L226 Difference]: Without dead ends: 9185 [2020-10-12 19:55:46,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:55:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9185 states. [2020-10-12 19:55:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9185 to 2147. [2020-10-12 19:55:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2020-10-12 19:55:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 3176 transitions. [2020-10-12 19:55:47,213 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 3176 transitions. Word has length 57 [2020-10-12 19:55:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:47,213 INFO L479 AbstractCegarLoop]: Abstraction has 2147 states and 3176 transitions. [2020-10-12 19:55:47,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:55:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 3176 transitions. [2020-10-12 19:55:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:55:47,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:47,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:47,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:55:47,216 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash -953848150, now seen corresponding path program 1 times [2020-10-12 19:55:47,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:47,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146169693] [2020-10-12 19:55:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:47,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:47,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:47,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:48,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:55:48,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:55:48,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-12 19:55:48,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:48,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:55:48,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:55:48,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:55:48,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:48,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:48,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:48,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:48,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:48,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:55:48,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:48,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:48,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:48,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146169693] [2020-10-12 19:55:48,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:48,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:55:48,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906620581] [2020-10-12 19:55:48,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:55:48,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:48,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:55:48,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:55:48,361 INFO L87 Difference]: Start difference. First operand 2147 states and 3176 transitions. Second operand 10 states. [2020-10-12 19:55:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:51,810 INFO L93 Difference]: Finished difference Result 8433 states and 12732 transitions. [2020-10-12 19:55:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 19:55:51,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-12 19:55:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:51,875 INFO L225 Difference]: With dead ends: 8433 [2020-10-12 19:55:51,876 INFO L226 Difference]: Without dead ends: 8081 [2020-10-12 19:55:51,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-10-12 19:55:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2020-10-12 19:55:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 2035. [2020-10-12 19:55:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2035 states. [2020-10-12 19:55:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 3024 transitions. [2020-10-12 19:55:52,480 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 3024 transitions. Word has length 57 [2020-10-12 19:55:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:52,481 INFO L479 AbstractCegarLoop]: Abstraction has 2035 states and 3024 transitions. [2020-10-12 19:55:52,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:55:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 3024 transitions. [2020-10-12 19:55:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 19:55:52,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:52,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:52,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:55:52,483 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash 42801802, now seen corresponding path program 1 times [2020-10-12 19:55:52,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:52,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046627348] [2020-10-12 19:55:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:52,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:52,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:52,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:53,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:53,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 19:55:53,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:55:53,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-12 19:55:53,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:55:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:55:53,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:55:53,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:53,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:53,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:53,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:53,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:53,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:53,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:55:53,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:53,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:53,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:53,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:53,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:53,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046627348] [2020-10-12 19:55:53,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:53,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:55:53,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345361950] [2020-10-12 19:55:53,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:55:53,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:53,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:55:53,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:55:53,784 INFO L87 Difference]: Start difference. First operand 2035 states and 3024 transitions. Second operand 10 states. [2020-10-12 19:55:54,344 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-12 19:55:54,480 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-12 19:55:54,644 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-12 19:55:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:57,022 INFO L93 Difference]: Finished difference Result 8269 states and 12489 transitions. [2020-10-12 19:55:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 19:55:57,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-12 19:55:57,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:57,045 INFO L225 Difference]: With dead ends: 8269 [2020-10-12 19:55:57,045 INFO L226 Difference]: Without dead ends: 7343 [2020-10-12 19:55:57,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-12 19:55:57,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2020-10-12 19:55:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 1813. [2020-10-12 19:55:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1813 states. [2020-10-12 19:55:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2696 transitions. [2020-10-12 19:55:57,600 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2696 transitions. Word has length 57 [2020-10-12 19:55:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:57,600 INFO L479 AbstractCegarLoop]: Abstraction has 1813 states and 2696 transitions. [2020-10-12 19:55:57,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:55:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2696 transitions. [2020-10-12 19:55:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:55:57,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:57,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:57,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:55:57,606 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash -683451666, now seen corresponding path program 1 times [2020-10-12 19:55:57,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:57,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913309709] [2020-10-12 19:55:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:57,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:58,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:58,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:55:58,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:55:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1109 [2020-10-12 19:55:58,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:55:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:55:58,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:55:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:58,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:58,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:58,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:58,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:58,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:58,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:55:58,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:58,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:58,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:58,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913309709] [2020-10-12 19:55:58,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:58,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:58,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939473045] [2020-10-12 19:55:58,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:55:58,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:55:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:58,903 INFO L87 Difference]: Start difference. First operand 1813 states and 2696 transitions. Second operand 6 states. [2020-10-12 19:56:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:00,497 INFO L93 Difference]: Finished difference Result 5606 states and 8467 transitions. [2020-10-12 19:56:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:56:00,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-12 19:56:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:00,507 INFO L225 Difference]: With dead ends: 5606 [2020-10-12 19:56:00,507 INFO L226 Difference]: Without dead ends: 3940 [2020-10-12 19:56:00,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3940 states. [2020-10-12 19:56:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3940 to 3936. [2020-10-12 19:56:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3936 states. [2020-10-12 19:56:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 5868 transitions. [2020-10-12 19:56:01,555 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 5868 transitions. Word has length 69 [2020-10-12 19:56:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:01,555 INFO L479 AbstractCegarLoop]: Abstraction has 3936 states and 5868 transitions. [2020-10-12 19:56:01,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 5868 transitions. [2020-10-12 19:56:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:56:01,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:01,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:01,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:56:01,561 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 79841318, now seen corresponding path program 1 times [2020-10-12 19:56:01,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:01,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770310327] [2020-10-12 19:56:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:01,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:01,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:01,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:01,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:02,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:02,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:56:02,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:56:02,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-12 19:56:02,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:02,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:56:02,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:02,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:56:02,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:02,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:02,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:02,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:02,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:02,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:02,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:56:02,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:02,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:02,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770310327] [2020-10-12 19:56:02,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:02,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:56:02,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967001265] [2020-10-12 19:56:02,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:56:02,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:02,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:56:02,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:02,463 INFO L87 Difference]: Start difference. First operand 3936 states and 5868 transitions. Second operand 6 states. [2020-10-12 19:56:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:03,590 INFO L93 Difference]: Finished difference Result 5916 states and 8882 transitions. [2020-10-12 19:56:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:56:03,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 19:56:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:03,602 INFO L225 Difference]: With dead ends: 5916 [2020-10-12 19:56:03,603 INFO L226 Difference]: Without dead ends: 2243 [2020-10-12 19:56:03,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:56:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2020-10-12 19:56:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 2241. [2020-10-12 19:56:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2241 states. [2020-10-12 19:56:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3308 transitions. [2020-10-12 19:56:04,305 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3308 transitions. Word has length 70 [2020-10-12 19:56:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:04,305 INFO L479 AbstractCegarLoop]: Abstraction has 2241 states and 3308 transitions. [2020-10-12 19:56:04,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3308 transitions. [2020-10-12 19:56:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:56:04,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:04,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:04,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:56:04,309 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -217559561, now seen corresponding path program 1 times [2020-10-12 19:56:04,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:04,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959456303] [2020-10-12 19:56:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:04,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:04,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:04,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:56:04,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:56:04,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-12 19:56:04,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:04,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:56:04,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 19:56:04,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 19:56:04,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:05,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:05,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:05,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:05,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:05,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:05,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:56:05,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:05,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:05,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:05,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:05,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:05,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959456303] [2020-10-12 19:56:05,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:05,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:56:05,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017934343] [2020-10-12 19:56:05,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:56:05,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:05,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:56:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:05,095 INFO L87 Difference]: Start difference. First operand 2241 states and 3308 transitions. Second operand 6 states. [2020-10-12 19:56:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:06,802 INFO L93 Difference]: Finished difference Result 5177 states and 7589 transitions. [2020-10-12 19:56:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:56:06,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 19:56:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:06,810 INFO L225 Difference]: With dead ends: 5177 [2020-10-12 19:56:06,810 INFO L226 Difference]: Without dead ends: 5175 [2020-10-12 19:56:06,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:56:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2020-10-12 19:56:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 2373. [2020-10-12 19:56:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-10-12 19:56:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 3440 transitions. [2020-10-12 19:56:07,634 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 3440 transitions. Word has length 70 [2020-10-12 19:56:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:07,634 INFO L479 AbstractCegarLoop]: Abstraction has 2373 states and 3440 transitions. [2020-10-12 19:56:07,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 3440 transitions. [2020-10-12 19:56:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:56:07,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:07,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:07,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:56:07,638 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -437089086, now seen corresponding path program 1 times [2020-10-12 19:56:07,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:07,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381892525] [2020-10-12 19:56:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:07,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:07,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:07,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:07,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:07,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:08,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:08,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:56:08,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:56:08,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-12 19:56:08,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:56:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 19:56:08,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:08,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:08,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:08,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:08,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:08,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:08,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:56:08,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:08,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:08,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:08,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381892525] [2020-10-12 19:56:08,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:08,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:56:08,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654383748] [2020-10-12 19:56:08,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:56:08,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:08,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:56:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:08,617 INFO L87 Difference]: Start difference. First operand 2373 states and 3440 transitions. Second operand 6 states. [2020-10-12 19:56:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:10,015 INFO L93 Difference]: Finished difference Result 5643 states and 8267 transitions. [2020-10-12 19:56:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:56:10,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 19:56:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:10,019 INFO L225 Difference]: With dead ends: 5643 [2020-10-12 19:56:10,019 INFO L226 Difference]: Without dead ends: 3381 [2020-10-12 19:56:10,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:56:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2020-10-12 19:56:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 3379. [2020-10-12 19:56:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3379 states. [2020-10-12 19:56:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 4910 transitions. [2020-10-12 19:56:10,762 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 4910 transitions. Word has length 71 [2020-10-12 19:56:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:10,762 INFO L479 AbstractCegarLoop]: Abstraction has 3379 states and 4910 transitions. [2020-10-12 19:56:10,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 4910 transitions. [2020-10-12 19:56:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:56:10,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:10,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:10,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:56:10,766 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:10,766 INFO L82 PathProgramCache]: Analyzing trace with hash -980757664, now seen corresponding path program 1 times [2020-10-12 19:56:10,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:10,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155584057] [2020-10-12 19:56:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:10,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:10,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:10,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:10,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:11,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:12,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:12,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:56:12,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:56:12,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2090 [2020-10-12 19:56:12,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:12,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:56:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:56:12,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:13,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:13,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:13,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:13,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:13,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:13,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:56:13,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:13,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:13,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:13,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:13,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:13,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155584057] [2020-10-12 19:56:13,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:13,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:56:13,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204043706] [2020-10-12 19:56:13,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:56:13,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:56:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:56:13,143 INFO L87 Difference]: Start difference. First operand 3379 states and 4910 transitions. Second operand 11 states. [2020-10-12 19:56:13,304 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:56:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:18,681 INFO L93 Difference]: Finished difference Result 17524 states and 25606 transitions. [2020-10-12 19:56:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 19:56:18,686 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 19:56:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:18,704 INFO L225 Difference]: With dead ends: 17524 [2020-10-12 19:56:18,705 INFO L226 Difference]: Without dead ends: 14346 [2020-10-12 19:56:18,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2020-10-12 19:56:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14346 states. [2020-10-12 19:56:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14346 to 3425. [2020-10-12 19:56:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3425 states. [2020-10-12 19:56:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 4959 transitions. [2020-10-12 19:56:19,759 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 4959 transitions. Word has length 72 [2020-10-12 19:56:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:19,759 INFO L479 AbstractCegarLoop]: Abstraction has 3425 states and 4959 transitions. [2020-10-12 19:56:19,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:56:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 4959 transitions. [2020-10-12 19:56:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:56:19,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:19,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:19,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:56:19,762 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:19,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:19,762 INFO L82 PathProgramCache]: Analyzing trace with hash 583787322, now seen corresponding path program 1 times [2020-10-12 19:56:19,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:19,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100844836] [2020-10-12 19:56:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:19,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:20,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:21,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:21,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:56:21,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:56:21,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1735 [2020-10-12 19:56:21,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:21,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:56:21,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:56:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:56:21,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:21,722 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-12 19:56:21,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:21,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:21,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:21,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:21,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:21,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:56:21,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:21,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:21,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:21,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100844836] [2020-10-12 19:56:21,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:21,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:56:21,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669658682] [2020-10-12 19:56:21,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:56:21,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:21,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:56:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:21,750 INFO L87 Difference]: Start difference. First operand 3425 states and 4959 transitions. Second operand 6 states. [2020-10-12 19:56:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:23,684 INFO L93 Difference]: Finished difference Result 7079 states and 10201 transitions. [2020-10-12 19:56:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:56:23,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-12 19:56:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:23,691 INFO L225 Difference]: With dead ends: 7079 [2020-10-12 19:56:23,691 INFO L226 Difference]: Without dead ends: 5701 [2020-10-12 19:56:23,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2020-10-12 19:56:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4903. [2020-10-12 19:56:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4903 states. [2020-10-12 19:56:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 6983 transitions. [2020-10-12 19:56:24,995 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 6983 transitions. Word has length 72 [2020-10-12 19:56:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:24,995 INFO L479 AbstractCegarLoop]: Abstraction has 4903 states and 6983 transitions. [2020-10-12 19:56:24,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 6983 transitions. [2020-10-12 19:56:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:56:24,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:24,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:24,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:56:24,998 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash 645234624, now seen corresponding path program 1 times [2020-10-12 19:56:24,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:24,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294493637] [2020-10-12 19:56:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:25,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:25,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:25,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:25,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:27,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:27,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:56:27,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:56:27,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2076 [2020-10-12 19:56:27,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:27,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:56:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:56:27,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:27,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:27,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:27,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:27,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:27,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:27,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:56:27,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:27,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:27,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:27,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:27,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:27,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294493637] [2020-10-12 19:56:27,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:27,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:56:27,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759122394] [2020-10-12 19:56:27,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:56:27,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:27,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:56:27,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:56:27,355 INFO L87 Difference]: Start difference. First operand 4903 states and 6983 transitions. Second operand 11 states. [2020-10-12 19:56:27,547 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 19:56:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:33,226 INFO L93 Difference]: Finished difference Result 16288 states and 23337 transitions. [2020-10-12 19:56:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 19:56:33,226 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 19:56:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:33,241 INFO L225 Difference]: With dead ends: 16288 [2020-10-12 19:56:33,241 INFO L226 Difference]: Without dead ends: 14597 [2020-10-12 19:56:33,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-10-12 19:56:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14597 states. [2020-10-12 19:56:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14597 to 4903. [2020-10-12 19:56:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4903 states. [2020-10-12 19:56:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 6979 transitions. [2020-10-12 19:56:34,433 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 6979 transitions. Word has length 72 [2020-10-12 19:56:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:34,434 INFO L479 AbstractCegarLoop]: Abstraction has 4903 states and 6979 transitions. [2020-10-12 19:56:34,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:56:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 6979 transitions. [2020-10-12 19:56:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 19:56:34,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:34,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:34,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:56:34,437 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1425640385, now seen corresponding path program 1 times [2020-10-12 19:56:34,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:34,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365199206] [2020-10-12 19:56:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:34,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:34,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:34,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:34,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 19:56:34,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:56:34,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-12 19:56:34,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:56:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:56:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:56:34,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:34,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:34,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:34,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:34,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:34,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:34,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:56:34,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:34,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:34,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:34,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:34,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:34,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365199206] [2020-10-12 19:56:34,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:34,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:56:34,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451226102] [2020-10-12 19:56:34,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:56:34,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:56:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:56:34,953 INFO L87 Difference]: Start difference. First operand 4903 states and 6979 transitions. Second operand 5 states. [2020-10-12 19:56:35,108 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-12 19:56:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:37,741 INFO L93 Difference]: Finished difference Result 12715 states and 18185 transitions. [2020-10-12 19:56:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:56:37,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-12 19:56:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:37,753 INFO L225 Difference]: With dead ends: 12715 [2020-10-12 19:56:37,753 INFO L226 Difference]: Without dead ends: 8203 [2020-10-12 19:56:37,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:56:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2020-10-12 19:56:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8115. [2020-10-12 19:56:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8115 states. [2020-10-12 19:56:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8115 states to 8115 states and 11408 transitions. [2020-10-12 19:56:39,846 INFO L78 Accepts]: Start accepts. Automaton has 8115 states and 11408 transitions. Word has length 73 [2020-10-12 19:56:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:39,846 INFO L479 AbstractCegarLoop]: Abstraction has 8115 states and 11408 transitions. [2020-10-12 19:56:39,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:56:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8115 states and 11408 transitions. [2020-10-12 19:56:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 19:56:39,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:39,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:39,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:56:39,851 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1002767952, now seen corresponding path program 1 times [2020-10-12 19:56:39,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:39,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69455063] [2020-10-12 19:56:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:39,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:39,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:39,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:40,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:41,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:41,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 19:56:41,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:56:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1519 [2020-10-12 19:56:41,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:56:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:56:41,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 19:56:41,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:41,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:41,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:41,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:41,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:41,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:56:41,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:41,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69455063] [2020-10-12 19:56:41,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:41,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:56:41,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599604302] [2020-10-12 19:56:41,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:56:41,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:41,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:56:41,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:41,551 INFO L87 Difference]: Start difference. First operand 8115 states and 11408 transitions. Second operand 6 states. [2020-10-12 19:56:41,676 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-12 19:56:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:45,253 INFO L93 Difference]: Finished difference Result 16595 states and 23651 transitions. [2020-10-12 19:56:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:56:45,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-12 19:56:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:45,266 INFO L225 Difference]: With dead ends: 16595 [2020-10-12 19:56:45,266 INFO L226 Difference]: Without dead ends: 12179 [2020-10-12 19:56:45,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:56:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12179 states. [2020-10-12 19:56:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12179 to 12077. [2020-10-12 19:56:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12077 states. [2020-10-12 19:56:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12077 states to 12077 states and 16990 transitions. [2020-10-12 19:56:48,398 INFO L78 Accepts]: Start accepts. Automaton has 12077 states and 16990 transitions. Word has length 74 [2020-10-12 19:56:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:48,398 INFO L479 AbstractCegarLoop]: Abstraction has 12077 states and 16990 transitions. [2020-10-12 19:56:48,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:56:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 12077 states and 16990 transitions. [2020-10-12 19:56:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 19:56:48,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:48,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:48,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:56:48,403 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash 642154242, now seen corresponding path program 1 times [2020-10-12 19:56:48,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:48,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153904435] [2020-10-12 19:56:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:48,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:48,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:48,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:48,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:49,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:49,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 19:56:49,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:56:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-12 19:56:49,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:56:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:56:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 19:56:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:49,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:49,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:49,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:49,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:49,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:56:49,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:49,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153904435] [2020-10-12 19:56:49,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:56:49,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:56:49,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601466807] [2020-10-12 19:56:49,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:56:49,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:49,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:56:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:56:49,161 INFO L87 Difference]: Start difference. First operand 12077 states and 16990 transitions. Second operand 6 states. [2020-10-12 19:56:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:55,643 INFO L93 Difference]: Finished difference Result 28212 states and 40148 transitions. [2020-10-12 19:56:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:56:55,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-12 19:56:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:55,662 INFO L225 Difference]: With dead ends: 28212 [2020-10-12 19:56:55,663 INFO L226 Difference]: Without dead ends: 22456 [2020-10-12 19:56:55,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:56:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22456 states. [2020-10-12 19:57:01,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22456 to 19092. [2020-10-12 19:57:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19092 states. [2020-10-12 19:57:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19092 states to 19092 states and 26962 transitions. [2020-10-12 19:57:01,208 INFO L78 Accepts]: Start accepts. Automaton has 19092 states and 26962 transitions. Word has length 74 [2020-10-12 19:57:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:01,209 INFO L479 AbstractCegarLoop]: Abstraction has 19092 states and 26962 transitions. [2020-10-12 19:57:01,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:57:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 19092 states and 26962 transitions. [2020-10-12 19:57:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 19:57:01,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:01,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:01,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:57:01,213 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2123005751, now seen corresponding path program 1 times [2020-10-12 19:57:01,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:01,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517207001] [2020-10-12 19:57:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:01,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:01,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:01,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:01,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:01,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:01,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:01,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:02,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:03,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:03,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 19:57:03,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:57:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1981 [2020-10-12 19:57:03,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:57:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:57:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 19:57:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:03,391 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-10-12 19:57:03,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:03,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:03,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:03,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:03,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:03,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:57:03,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:57:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:03,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:57:03,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:03,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517207001] [2020-10-12 19:57:03,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:03,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:57:03,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009658512] [2020-10-12 19:57:03,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:57:03,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:57:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:57:03,584 INFO L87 Difference]: Start difference. First operand 19092 states and 26962 transitions. Second operand 12 states. [2020-10-12 19:57:03,745 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-12 19:57:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:24,269 INFO L93 Difference]: Finished difference Result 75474 states and 104968 transitions. [2020-10-12 19:57:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 19:57:24,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-10-12 19:57:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:24,350 INFO L225 Difference]: With dead ends: 75474 [2020-10-12 19:57:24,350 INFO L226 Difference]: Without dead ends: 67318 [2020-10-12 19:57:24,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 19:57:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67318 states. [2020-10-12 19:57:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67318 to 24962. [2020-10-12 19:57:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24962 states. [2020-10-12 19:57:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24962 states to 24962 states and 35104 transitions. [2020-10-12 19:57:31,499 INFO L78 Accepts]: Start accepts. Automaton has 24962 states and 35104 transitions. Word has length 74 [2020-10-12 19:57:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:31,499 INFO L479 AbstractCegarLoop]: Abstraction has 24962 states and 35104 transitions. [2020-10-12 19:57:31,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:57:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 24962 states and 35104 transitions. [2020-10-12 19:57:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 19:57:31,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:31,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:31,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:57:31,505 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:31,506 INFO L82 PathProgramCache]: Analyzing trace with hash -20804725, now seen corresponding path program 1 times [2020-10-12 19:57:31,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:31,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624112612] [2020-10-12 19:57:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:31,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:31,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:31,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:32,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:32,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 19:57:32,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:57:32,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1111 [2020-10-12 19:57:32,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:32,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:57:32,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:32,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 19:57:32,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:32,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:32,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:32,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:32,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:32,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:32,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:57:32,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:32,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:32,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:32,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:32,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:32,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624112612] [2020-10-12 19:57:32,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:32,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:57:32,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502678191] [2020-10-12 19:57:32,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:57:32,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:57:32,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:57:32,866 INFO L87 Difference]: Start difference. First operand 24962 states and 35104 transitions. Second operand 8 states. [2020-10-12 19:57:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:57:48,296 INFO L93 Difference]: Finished difference Result 70484 states and 98070 transitions. [2020-10-12 19:57:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:57:48,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-10-12 19:57:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:57:48,352 INFO L225 Difference]: With dead ends: 70484 [2020-10-12 19:57:48,353 INFO L226 Difference]: Without dead ends: 46887 [2020-10-12 19:57:48,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:57:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46887 states. [2020-10-12 19:57:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46887 to 22368. [2020-10-12 19:57:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22368 states. [2020-10-12 19:57:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22368 states to 22368 states and 31221 transitions. [2020-10-12 19:57:54,655 INFO L78 Accepts]: Start accepts. Automaton has 22368 states and 31221 transitions. Word has length 74 [2020-10-12 19:57:54,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:57:54,655 INFO L479 AbstractCegarLoop]: Abstraction has 22368 states and 31221 transitions. [2020-10-12 19:57:54,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:57:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 22368 states and 31221 transitions. [2020-10-12 19:57:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 19:57:54,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:57:54,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:57:54,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:57:54,659 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:57:54,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:57:54,659 INFO L82 PathProgramCache]: Analyzing trace with hash -151908559, now seen corresponding path program 1 times [2020-10-12 19:57:54,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:57:54,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021560762] [2020-10-12 19:57:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:57:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:54,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:54,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:54,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:54,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:54,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:54,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:55,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:58,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:58,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 19:57:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:57:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3959 [2020-10-12 19:57:58,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:57:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:57:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 19:57:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:58,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:57:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:57:58,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:57:58,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:57:58,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:57:58,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:57:58,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:57:58,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:57:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:57:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:57:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:57:58,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:57:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:57:58,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021560762] [2020-10-12 19:57:58,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:57:58,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:57:58,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830065501] [2020-10-12 19:57:58,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:57:58,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:57:58,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:57:58,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:57:58,876 INFO L87 Difference]: Start difference. First operand 22368 states and 31221 transitions. Second operand 8 states. [2020-10-12 19:58:10,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:58:10,573 INFO L93 Difference]: Finished difference Result 51867 states and 71642 transitions. [2020-10-12 19:58:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:58:10,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-12 19:58:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:58:10,620 INFO L225 Difference]: With dead ends: 51867 [2020-10-12 19:58:10,620 INFO L226 Difference]: Without dead ends: 35275 [2020-10-12 19:58:10,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:58:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35275 states. [2020-10-12 19:58:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35275 to 22293. [2020-10-12 19:58:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22293 states. [2020-10-12 19:58:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22293 states to 22293 states and 31096 transitions. [2020-10-12 19:58:16,893 INFO L78 Accepts]: Start accepts. Automaton has 22293 states and 31096 transitions. Word has length 75 [2020-10-12 19:58:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:58:16,894 INFO L479 AbstractCegarLoop]: Abstraction has 22293 states and 31096 transitions. [2020-10-12 19:58:16,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:58:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 22293 states and 31096 transitions. [2020-10-12 19:58:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:58:16,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:58:16,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:58:16,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:58:16,905 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:58:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:58:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash 956345622, now seen corresponding path program 1 times [2020-10-12 19:58:16,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:58:16,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400274754] [2020-10-12 19:58:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:58:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:16,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:16,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:16,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:17,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:17,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:17,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:21,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:21,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:58:21,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:58:21,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4693 [2020-10-12 19:58:21,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:21,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:58:21,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:58:21,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 19:58:21,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:21,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:58:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:21,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:21,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:21,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:58:21,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:58:21,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:58:21,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:58:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:58:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:58:21,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 19:58:21,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400274754] [2020-10-12 19:58:21,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:58:21,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:58:21,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770853560] [2020-10-12 19:58:21,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:58:21,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:58:21,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:58:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:58:21,765 INFO L87 Difference]: Start difference. First operand 22293 states and 31096 transitions. Second operand 6 states. [2020-10-12 19:58:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:58:33,482 INFO L93 Difference]: Finished difference Result 61763 states and 86658 transitions. [2020-10-12 19:58:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:58:33,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-10-12 19:58:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:58:33,532 INFO L225 Difference]: With dead ends: 61763 [2020-10-12 19:58:33,532 INFO L226 Difference]: Without dead ends: 40381 [2020-10-12 19:58:33,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:58:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40381 states. [2020-10-12 19:58:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40381 to 40379. [2020-10-12 19:58:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40379 states. [2020-10-12 19:58:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40379 states to 40379 states and 56233 transitions. [2020-10-12 19:58:45,800 INFO L78 Accepts]: Start accepts. Automaton has 40379 states and 56233 transitions. Word has length 93 [2020-10-12 19:58:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:58:45,800 INFO L479 AbstractCegarLoop]: Abstraction has 40379 states and 56233 transitions. [2020-10-12 19:58:45,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:58:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 40379 states and 56233 transitions. [2020-10-12 19:58:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:58:45,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:58:45,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:58:45,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:58:45,819 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:58:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:58:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash -235783717, now seen corresponding path program 1 times [2020-10-12 19:58:45,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:58:45,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39169537] [2020-10-12 19:58:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:58:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:45,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:45,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:45,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:45,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:46,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:46,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:46,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:50,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:50,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:58:50,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:58:50,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:58:50,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:50,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:58:50,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:58:50,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 19:58:50,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:51,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:58:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:58:51,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:58:51,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:58:51,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:58:51,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:58:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:58:51,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:58:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:58:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:58:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:58:51,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:58:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:58:51,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39169537] [2020-10-12 19:58:51,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:58:51,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:58:51,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780172935] [2020-10-12 19:58:51,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:58:51,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:58:51,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:58:51,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:58:51,078 INFO L87 Difference]: Start difference. First operand 40379 states and 56233 transitions. Second operand 8 states.