/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:40:48,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:40:48,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:40:48,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:40:48,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:40:48,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:40:48,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:40:48,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:40:48,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:40:48,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:40:48,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:40:48,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:40:48,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:40:48,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:40:48,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:40:48,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:40:48,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:40:48,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:40:48,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:40:48,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:40:48,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:40:48,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:40:48,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:40:48,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:40:48,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:40:48,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:40:48,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:40:48,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:40:48,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:40:48,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:40:48,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:40:48,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:40:48,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:40:48,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:40:48,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:40:48,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:40:48,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:40:48,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:40:48,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:40:48,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:40:48,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:40:48,632 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 [2020-10-27 23:40:48,674 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:40:48,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:40:48,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:40:48,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:40:48,677 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:40:48,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:40:48,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:40:48,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:40:48,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:40:48,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:40:48,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:40:48,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:40:48,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:40:48,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:40:48,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:40:48,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:40:48,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:40:48,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:40:48,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:40:48,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:40:48,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:40:48,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:40:48,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:40:48,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:40:48,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:40:48,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:40:48,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:40:48,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:40:48,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:40:48,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:40:49,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:40:49,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:40:49,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:40:49,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:40:49,138 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:40:49,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:40:49,237 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c16a162a9/b9bf79851b004433a7242ee5b363cab0/FLAG254fc195c [2020-10-27 23:40:49,912 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:40:49,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:40:49,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c16a162a9/b9bf79851b004433a7242ee5b363cab0/FLAG254fc195c [2020-10-27 23:40:50,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c16a162a9/b9bf79851b004433a7242ee5b363cab0 [2020-10-27 23:40:50,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:40:50,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:40:50,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:40:50,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:40:50,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:40:50,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d0f3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50, skipping insertion in model container [2020-10-27 23:40:50,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:40:50,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:40:50,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:40:50,505 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:40:50,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:40:50,704 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:40:50,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50 WrapperNode [2020-10-27 23:40:50,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:40:50,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:40:50,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:40:50,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:40:50,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:40:50,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:40:50,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:40:50,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:40:50,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (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 [2020-10-27 23:40:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:40:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:40:50,865 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:40:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:40:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:40:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:40:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:40:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:40:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:40:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:40:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:40:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:40:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:40:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:40:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:40:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:40:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:40:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:40:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:40:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:40:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:40:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:40:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:40:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:40:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:40:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:40:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:40:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:40:51,774 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:40:51,774 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:40:51,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:40:51 BoogieIcfgContainer [2020-10-27 23:40:51,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:40:51,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:40:51,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:40:51,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:40:51,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:40:50" (1/3) ... [2020-10-27 23:40:51,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb477bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:40:51, skipping insertion in model container [2020-10-27 23:40:51,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (2/3) ... [2020-10-27 23:40:51,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb477bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:40:51, skipping insertion in model container [2020-10-27 23:40:51,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:40:51" (3/3) ... [2020-10-27 23:40:51,787 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 23:40:51,799 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:40:51,805 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:40:51,819 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:40:51,849 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:40:51,849 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:40:51,849 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:40:51,850 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:40:51,850 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:40:51,850 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:40:51,850 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:40:51,850 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:40:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-27 23:40:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:40:51,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:51,882 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] [2020-10-27 23:40:51,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1104418387, now seen corresponding path program 1 times [2020-10-27 23:40:51,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:51,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56605369] [2020-10-27 23:40:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:52,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:52,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:52,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:52,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:52,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:56,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:57,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:57,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:40:57,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:40:57,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:40:57,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:57,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:40:57,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 23:40:57,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 23:40:57,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:40:57,458 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:40:57,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:57,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:57,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:57,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:57,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:57,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:40:57,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:57,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:57,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 17 [2020-10-27 23:40:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:40:57,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56605369] [2020-10-27 23:40:57,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:57,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:40:57,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265637551] [2020-10-27 23:40:57,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:40:57,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:40:57,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:40:57,554 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2020-10-27 23:40:57,778 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:40:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:40:58,459 INFO L93 Difference]: Finished difference Result 227 states and 365 transitions. [2020-10-27 23:40:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:40:58,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-27 23:40:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:40:58,473 INFO L225 Difference]: With dead ends: 227 [2020-10-27 23:40:58,474 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 23:40:58,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:40:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 23:40:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2020-10-27 23:40:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 23:40:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 227 transitions. [2020-10-27 23:40:58,539 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 227 transitions. Word has length 52 [2020-10-27 23:40:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:40:58,540 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 227 transitions. [2020-10-27 23:40:58,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:40:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 227 transitions. [2020-10-27 23:40:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:40:58,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:58,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:40:58,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:40:58,543 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1128688483, now seen corresponding path program 1 times [2020-10-27 23:40:58,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:58,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954998704] [2020-10-27 23:40:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:58,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:58,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:58,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:58,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:58,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:59,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:59,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:03,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:41:03,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:41:03,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:41:03,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 23:41:03,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 23:41:03,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:03,832 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:03,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:03,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:03,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:03,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:03,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:41:03,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:03,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:03,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:03,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954998704] [2020-10-27 23:41:03,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:03,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:41:03,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353336298] [2020-10-27 23:41:03,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:41:03,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:41:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:41:03,904 INFO L87 Difference]: Start difference. First operand 160 states and 227 transitions. Second operand 4 states. [2020-10-27 23:41:04,097 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:41:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:04,675 INFO L93 Difference]: Finished difference Result 252 states and 366 transitions. [2020-10-27 23:41:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:41:04,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-27 23:41:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:04,678 INFO L225 Difference]: With dead ends: 252 [2020-10-27 23:41:04,679 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 23:41:04,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 23:41:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-27 23:41:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-27 23:41:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 228 transitions. [2020-10-27 23:41:04,700 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 228 transitions. Word has length 53 [2020-10-27 23:41:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:04,700 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 228 transitions. [2020-10-27 23:41:04,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:41:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 228 transitions. [2020-10-27 23:41:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:41:04,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:04,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:04,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:41:04,703 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:04,704 INFO L82 PathProgramCache]: Analyzing trace with hash -95828956, now seen corresponding path program 1 times [2020-10-27 23:41:04,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:04,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228449471] [2020-10-27 23:41:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:04,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:04,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:04,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:04,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:04,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:09,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:41:09,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:41:09,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:41:09,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:09,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:41:09,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:09,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:41:09,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:10,028 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2020-10-27 23:41:10,248 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:10,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:10,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:10,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:10,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:10,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:41:10,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:10,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:10,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:10,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:10,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:10,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228449471] [2020-10-27 23:41:10,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:10,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:41:10,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130586202] [2020-10-27 23:41:10,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:41:10,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:10,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:41:10,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:41:10,286 INFO L87 Difference]: Start difference. First operand 162 states and 228 transitions. Second operand 10 states. [2020-10-27 23:41:10,511 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:41:11,349 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:41:12,617 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:41:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:12,774 INFO L93 Difference]: Finished difference Result 681 states and 1002 transitions. [2020-10-27 23:41:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 23:41:12,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:41:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:12,786 INFO L225 Difference]: With dead ends: 681 [2020-10-27 23:41:12,787 INFO L226 Difference]: Without dead ends: 574 [2020-10-27 23:41:12,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2020-10-27 23:41:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-27 23:41:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 179. [2020-10-27 23:41:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 23:41:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 246 transitions. [2020-10-27 23:41:12,847 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 246 transitions. Word has length 54 [2020-10-27 23:41:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:12,848 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 246 transitions. [2020-10-27 23:41:12,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:41:12,848 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 246 transitions. [2020-10-27 23:41:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:41:12,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:12,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:12,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:41:12,854 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:12,857 INFO L82 PathProgramCache]: Analyzing trace with hash 464608014, now seen corresponding path program 1 times [2020-10-27 23:41:12,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:12,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921939962] [2020-10-27 23:41:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:12,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:12,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:17,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:17,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:41:17,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:41:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:41:17,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:41:17,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:41:17,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:18,126 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:18,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:18,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:18,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:18,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:18,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:41:18,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:18,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:18,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:18,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:18,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:18,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921939962] [2020-10-27 23:41:18,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:18,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:18,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558977267] [2020-10-27 23:41:18,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:18,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:18,162 INFO L87 Difference]: Start difference. First operand 179 states and 246 transitions. Second operand 6 states. [2020-10-27 23:41:18,341 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:41:18,868 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:41:19,084 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:41:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:19,892 INFO L93 Difference]: Finished difference Result 924 states and 1370 transitions. [2020-10-27 23:41:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:19,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:41:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:19,899 INFO L225 Difference]: With dead ends: 924 [2020-10-27 23:41:19,899 INFO L226 Difference]: Without dead ends: 831 [2020-10-27 23:41:19,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:41:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-10-27 23:41:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 466. [2020-10-27 23:41:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-27 23:41:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 681 transitions. [2020-10-27 23:41:19,957 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 681 transitions. Word has length 54 [2020-10-27 23:41:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:19,957 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 681 transitions. [2020-10-27 23:41:19,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 681 transitions. [2020-10-27 23:41:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:41:19,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:19,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:19,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:41:19,960 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1201199661, now seen corresponding path program 1 times [2020-10-27 23:41:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:19,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373643459] [2020-10-27 23:41:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:20,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:21,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:21,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:25,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:41:25,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:41:25,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:41:25,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:41:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:41:25,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:41:25,361 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:25,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:25,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:25,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:25,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:41:25,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:25,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:25,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:25,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:25,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:25,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373643459] [2020-10-27 23:41:25,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:25,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:41:25,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868816177] [2020-10-27 23:41:25,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:41:25,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:25,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:41:25,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:41:25,405 INFO L87 Difference]: Start difference. First operand 466 states and 681 transitions. Second operand 10 states. [2020-10-27 23:41:25,610 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:41:26,381 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:41:27,440 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:41:27,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:27,873 INFO L93 Difference]: Finished difference Result 4378 states and 6595 transitions. [2020-10-27 23:41:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:41:27,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:41:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:27,902 INFO L225 Difference]: With dead ends: 4378 [2020-10-27 23:41:27,903 INFO L226 Difference]: Without dead ends: 3987 [2020-10-27 23:41:27,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:41:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3987 states. [2020-10-27 23:41:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3987 to 498. [2020-10-27 23:41:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-27 23:41:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 709 transitions. [2020-10-27 23:41:28,020 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 709 transitions. Word has length 54 [2020-10-27 23:41:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:28,021 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 709 transitions. [2020-10-27 23:41:28,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:41:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 709 transitions. [2020-10-27 23:41:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:41:28,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:28,025 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] [2020-10-27 23:41:28,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:41:28,025 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:28,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:28,026 INFO L82 PathProgramCache]: Analyzing trace with hash -552316116, now seen corresponding path program 1 times [2020-10-27 23:41:28,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:28,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971772633] [2020-10-27 23:41:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:28,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:33,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:41:33,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:41:33,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:41:33,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:41:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:33,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:41:33,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:33,273 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:33,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:33,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:33,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:33,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:33,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:41:33,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:33,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:33,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:33,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:33,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971772633] [2020-10-27 23:41:33,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:33,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:41:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105574609] [2020-10-27 23:41:33,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:41:33,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:41:33,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:41:33,314 INFO L87 Difference]: Start difference. First operand 498 states and 709 transitions. Second operand 7 states. [2020-10-27 23:41:33,548 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:41:34,143 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 23:41:34,331 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:41:34,542 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:41:34,739 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:41:35,526 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:41:35,722 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:41:36,104 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:41:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:36,169 INFO L93 Difference]: Finished difference Result 2244 states and 3332 transitions. [2020-10-27 23:41:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:41:36,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 23:41:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:36,180 INFO L225 Difference]: With dead ends: 2244 [2020-10-27 23:41:36,180 INFO L226 Difference]: Without dead ends: 1925 [2020-10-27 23:41:36,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:41:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2020-10-27 23:41:36,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 752. [2020-10-27 23:41:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-10-27 23:41:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1088 transitions. [2020-10-27 23:41:36,288 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1088 transitions. Word has length 55 [2020-10-27 23:41:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:36,288 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 1088 transitions. [2020-10-27 23:41:36,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:41:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1088 transitions. [2020-10-27 23:41:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:41:36,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:36,290 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] [2020-10-27 23:41:36,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:41:36,290 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1502868669, now seen corresponding path program 1 times [2020-10-27 23:41:36,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:36,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614090403] [2020-10-27 23:41:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:36,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:36,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:36,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:36,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:36,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:36,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:41,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:41:41,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:41:41,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:41:41,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:41,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:41,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:41:41,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:41:41,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:41,524 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:41,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:41,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:41,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:41,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:41:41,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:41,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:41,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:41,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:41,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:41,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614090403] [2020-10-27 23:41:41,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:41,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:41,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380424942] [2020-10-27 23:41:41,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:41,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:41,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:41,563 INFO L87 Difference]: Start difference. First operand 752 states and 1088 transitions. Second operand 6 states. [2020-10-27 23:41:41,771 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:41:42,182 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:41:42,389 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:41:42,575 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:41:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:43,039 INFO L93 Difference]: Finished difference Result 2955 states and 4422 transitions. [2020-10-27 23:41:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:41:43,040 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:41:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:43,052 INFO L225 Difference]: With dead ends: 2955 [2020-10-27 23:41:43,052 INFO L226 Difference]: Without dead ends: 2402 [2020-10-27 23:41:43,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:41:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2020-10-27 23:41:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1583. [2020-10-27 23:41:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2020-10-27 23:41:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2329 transitions. [2020-10-27 23:41:43,248 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2329 transitions. Word has length 55 [2020-10-27 23:41:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:43,248 INFO L481 AbstractCegarLoop]: Abstraction has 1583 states and 2329 transitions. [2020-10-27 23:41:43,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2329 transitions. [2020-10-27 23:41:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:41:43,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:43,250 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] [2020-10-27 23:41:43,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:41:43,251 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:43,252 INFO L82 PathProgramCache]: Analyzing trace with hash -942431699, now seen corresponding path program 1 times [2020-10-27 23:41:43,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:43,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352882741] [2020-10-27 23:41:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:43,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:48,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:41:48,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:41:48,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:41:48,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:41:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:41:48,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:48,637 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:48,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:48,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:41:48,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:48,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:48,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352882741] [2020-10-27 23:41:48,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:48,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:41:48,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423848165] [2020-10-27 23:41:48,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:41:48,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:48,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:41:48,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:41:48,688 INFO L87 Difference]: Start difference. First operand 1583 states and 2329 transitions. Second operand 10 states. [2020-10-27 23:41:48,925 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:41:49,787 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:41:50,777 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:41:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:51,411 INFO L93 Difference]: Finished difference Result 9675 states and 14260 transitions. [2020-10-27 23:41:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:41:51,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:41:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:51,455 INFO L225 Difference]: With dead ends: 9675 [2020-10-27 23:41:51,456 INFO L226 Difference]: Without dead ends: 8295 [2020-10-27 23:41:51,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2020-10-27 23:41:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2020-10-27 23:41:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 1612. [2020-10-27 23:41:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1612 states. [2020-10-27 23:41:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2328 transitions. [2020-10-27 23:41:51,797 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2328 transitions. Word has length 55 [2020-10-27 23:41:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:51,797 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 2328 transitions. [2020-10-27 23:41:51,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:41:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2328 transitions. [2020-10-27 23:41:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:41:51,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:51,799 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] [2020-10-27 23:41:51,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:41:51,799 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2098664318, now seen corresponding path program 1 times [2020-10-27 23:41:51,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:51,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628256755] [2020-10-27 23:41:51,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:56,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:41:56,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:41:56,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:41:56,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:56,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:41:56,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:56,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:41:56,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:57,034 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 25 [2020-10-27 23:41:57,332 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:41:57,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:57,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:57,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:57,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:57,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:41:57,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:57,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:57,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628256755] [2020-10-27 23:41:57,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:57,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:41:57,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777992263] [2020-10-27 23:41:57,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:41:57,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:41:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:57,366 INFO L87 Difference]: Start difference. First operand 1612 states and 2328 transitions. Second operand 12 states. [2020-10-27 23:41:57,705 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 23:41:58,929 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 23:41:59,170 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 23:42:00,953 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:42:01,190 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:42:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:02,264 INFO L93 Difference]: Finished difference Result 14374 states and 20764 transitions. [2020-10-27 23:42:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 23:42:02,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-27 23:42:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:02,322 INFO L225 Difference]: With dead ends: 14374 [2020-10-27 23:42:02,322 INFO L226 Difference]: Without dead ends: 13563 [2020-10-27 23:42:02,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 23:42:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13563 states. [2020-10-27 23:42:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13563 to 1627. [2020-10-27 23:42:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1627 states. [2020-10-27 23:42:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2350 transitions. [2020-10-27 23:42:02,707 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2350 transitions. Word has length 56 [2020-10-27 23:42:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:02,707 INFO L481 AbstractCegarLoop]: Abstraction has 1627 states and 2350 transitions. [2020-10-27 23:42:02,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:42:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2350 transitions. [2020-10-27 23:42:02,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:42:02,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:02,709 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] [2020-10-27 23:42:02,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:42:02,709 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:02,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1269745709, now seen corresponding path program 1 times [2020-10-27 23:42:02,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:02,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811481874] [2020-10-27 23:42:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:07,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:42:07,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:42:07,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:42:07,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:07,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:07,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:07,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:42:07,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:07,949 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:07,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:07,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:07,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:07,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:07,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:42:07,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:07,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:07,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811481874] [2020-10-27 23:42:07,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:07,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:07,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618466565] [2020-10-27 23:42:07,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:07,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:07,982 INFO L87 Difference]: Start difference. First operand 1627 states and 2350 transitions. Second operand 6 states. [2020-10-27 23:42:08,190 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:08,958 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:09,208 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:11,254 INFO L93 Difference]: Finished difference Result 10387 states and 15410 transitions. [2020-10-27 23:42:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:11,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-27 23:42:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:11,278 INFO L225 Difference]: With dead ends: 10387 [2020-10-27 23:42:11,278 INFO L226 Difference]: Without dead ends: 9211 [2020-10-27 23:42:11,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2020-10-27 23:42:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 4748. [2020-10-27 23:42:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4748 states. [2020-10-27 23:42:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 6981 transitions. [2020-10-27 23:42:12,170 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 6981 transitions. Word has length 56 [2020-10-27 23:42:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:12,170 INFO L481 AbstractCegarLoop]: Abstraction has 4748 states and 6981 transitions. [2020-10-27 23:42:12,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 6981 transitions. [2020-10-27 23:42:12,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:42:12,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:12,172 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] [2020-10-27 23:42:12,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:42:12,172 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:12,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1684316739, now seen corresponding path program 1 times [2020-10-27 23:42:12,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:12,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103144138] [2020-10-27 23:42:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:17,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:42:17,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:42:17,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:42:17,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:17,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:42:17,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:17,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:42:17,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:17,539 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-27 23:42:17,786 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:17,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:17,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:17,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:17,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:17,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:42:17,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:17,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:17,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:17,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:17,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:17,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103144138] [2020-10-27 23:42:17,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:17,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:42:17,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115724314] [2020-10-27 23:42:17,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:42:17,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:17,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:42:17,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:42:17,819 INFO L87 Difference]: Start difference. First operand 4748 states and 6981 transitions. Second operand 11 states. [2020-10-27 23:42:18,331 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 147 [2020-10-27 23:42:18,610 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 23:42:19,630 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:22,984 INFO L93 Difference]: Finished difference Result 14448 states and 21241 transitions. [2020-10-27 23:42:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:42:22,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 23:42:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:23,027 INFO L225 Difference]: With dead ends: 14448 [2020-10-27 23:42:23,028 INFO L226 Difference]: Without dead ends: 13521 [2020-10-27 23:42:23,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-10-27 23:42:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2020-10-27 23:42:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 4768. [2020-10-27 23:42:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4768 states. [2020-10-27 23:42:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 7009 transitions. [2020-10-27 23:42:23,905 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 7009 transitions. Word has length 56 [2020-10-27 23:42:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:23,905 INFO L481 AbstractCegarLoop]: Abstraction has 4768 states and 7009 transitions. [2020-10-27 23:42:23,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:42:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 7009 transitions. [2020-10-27 23:42:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:42:23,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:23,907 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] [2020-10-27 23:42:23,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:42:23,908 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash 239208695, now seen corresponding path program 1 times [2020-10-27 23:42:23,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:23,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523805641] [2020-10-27 23:42:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:23,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:28,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:42:28,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 23:42:28,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:42:28,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:42:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:42:28,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:29,262 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 28 [2020-10-27 23:42:29,524 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:29,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:29,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:29,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:29,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:29,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:29,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:29,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:29,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:29,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:29,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:42:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:29,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523805641] [2020-10-27 23:42:29,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:29,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:42:29,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992918473] [2020-10-27 23:42:29,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:42:29,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:42:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:42:29,553 INFO L87 Difference]: Start difference. First operand 4768 states and 7009 transitions. Second operand 11 states. [2020-10-27 23:42:29,891 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 23:42:30,896 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:32,466 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:35,995 INFO L93 Difference]: Finished difference Result 28635 states and 41709 transitions. [2020-10-27 23:42:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 23:42:35,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 23:42:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:36,066 INFO L225 Difference]: With dead ends: 28635 [2020-10-27 23:42:36,066 INFO L226 Difference]: Without dead ends: 27836 [2020-10-27 23:42:36,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-27 23:42:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27836 states. [2020-10-27 23:42:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27836 to 4771. [2020-10-27 23:42:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4771 states. [2020-10-27 23:42:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4771 states to 4771 states and 7012 transitions. [2020-10-27 23:42:37,139 INFO L78 Accepts]: Start accepts. Automaton has 4771 states and 7012 transitions. Word has length 56 [2020-10-27 23:42:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:37,140 INFO L481 AbstractCegarLoop]: Abstraction has 4771 states and 7012 transitions. [2020-10-27 23:42:37,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:42:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4771 states and 7012 transitions. [2020-10-27 23:42:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:42:37,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:37,142 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] [2020-10-27 23:42:37,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:42:37,142 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:37,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:37,143 INFO L82 PathProgramCache]: Analyzing trace with hash -350208595, now seen corresponding path program 1 times [2020-10-27 23:42:37,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:37,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558965853] [2020-10-27 23:42:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:37,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:42,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:42:42,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:42:42,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:42:42,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:42,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:42:42,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:42:42,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:42:42,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:42,374 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:42,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:42,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:42,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:42,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:42,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:42,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:42,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:42,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:42,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:42,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:42,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558965853] [2020-10-27 23:42:42,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:42,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:42:42,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350727708] [2020-10-27 23:42:42,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:42:42,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:42:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:42:42,403 INFO L87 Difference]: Start difference. First operand 4771 states and 7012 transitions. Second operand 7 states. [2020-10-27 23:42:42,626 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:42:43,220 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 23:42:43,425 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:42:43,615 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:43,811 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:45,199 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:42:45,513 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 23:42:46,887 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:42:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:47,126 INFO L93 Difference]: Finished difference Result 17332 states and 25832 transitions. [2020-10-27 23:42:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:42:47,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-27 23:42:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:47,159 INFO L225 Difference]: With dead ends: 17332 [2020-10-27 23:42:47,159 INFO L226 Difference]: Without dead ends: 13979 [2020-10-27 23:42:47,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:42:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13979 states. [2020-10-27 23:42:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13979 to 4164. [2020-10-27 23:42:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4164 states. [2020-10-27 23:42:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 6096 transitions. [2020-10-27 23:42:48,339 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 6096 transitions. Word has length 56 [2020-10-27 23:42:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:48,339 INFO L481 AbstractCegarLoop]: Abstraction has 4164 states and 6096 transitions. [2020-10-27 23:42:48,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:42:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 6096 transitions. [2020-10-27 23:42:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:42:48,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:48,340 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] [2020-10-27 23:42:48,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:42:48,341 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:48,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1554694256, now seen corresponding path program 1 times [2020-10-27 23:42:48,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:48,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837003856] [2020-10-27 23:42:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:52,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:42:52,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:42:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4040 [2020-10-27 23:42:52,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:42:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:42:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:52,599 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:42:52,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:52,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:52,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:52,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:42:52,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:52,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:52,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:52,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:52,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:52,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837003856] [2020-10-27 23:42:52,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:52,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:52,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076469605] [2020-10-27 23:42:52,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:52,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:52,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:52,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:52,622 INFO L87 Difference]: Start difference. First operand 4164 states and 6096 transitions. Second operand 6 states. [2020-10-27 23:42:52,846 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:42:53,338 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:42:53,542 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:42:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:54,863 INFO L93 Difference]: Finished difference Result 8583 states and 12676 transitions. [2020-10-27 23:42:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 23:42:54,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 23:42:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:54,873 INFO L225 Difference]: With dead ends: 8583 [2020-10-27 23:42:54,873 INFO L226 Difference]: Without dead ends: 6368 [2020-10-27 23:42:54,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:42:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6368 states. [2020-10-27 23:42:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6368 to 5710. [2020-10-27 23:42:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5710 states. [2020-10-27 23:42:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 8433 transitions. [2020-10-27 23:42:56,174 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 8433 transitions. Word has length 57 [2020-10-27 23:42:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:56,174 INFO L481 AbstractCegarLoop]: Abstraction has 5710 states and 8433 transitions. [2020-10-27 23:42:56,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 8433 transitions. [2020-10-27 23:42:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:42:56,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:56,176 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] [2020-10-27 23:42:56,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:42:56,176 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1851690260, now seen corresponding path program 1 times [2020-10-27 23:42:56,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:56,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923450443] [2020-10-27 23:42:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:56,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:56,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:01,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:43:01,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:43:01,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:43:01,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:01,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:01,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:01,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:43:01,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:01,600 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:01,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:01,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:01,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:01,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:01,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:01,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:01,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:01,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:01,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:01,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:01,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923450443] [2020-10-27 23:43:01,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:01,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:01,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599742360] [2020-10-27 23:43:01,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:01,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:01,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:01,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:01,628 INFO L87 Difference]: Start difference. First operand 5710 states and 8433 transitions. Second operand 11 states. [2020-10-27 23:43:01,982 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 23:43:03,286 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:43:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:10,086 INFO L93 Difference]: Finished difference Result 35352 states and 52642 transitions. [2020-10-27 23:43:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 23:43:10,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 23:43:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:10,138 INFO L225 Difference]: With dead ends: 35352 [2020-10-27 23:43:10,139 INFO L226 Difference]: Without dead ends: 31633 [2020-10-27 23:43:10,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-27 23:43:10,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31633 states. [2020-10-27 23:43:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31633 to 5712. [2020-10-27 23:43:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5712 states. [2020-10-27 23:43:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5712 states to 5712 states and 8436 transitions. [2020-10-27 23:43:11,779 INFO L78 Accepts]: Start accepts. Automaton has 5712 states and 8436 transitions. Word has length 57 [2020-10-27 23:43:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:11,779 INFO L481 AbstractCegarLoop]: Abstraction has 5712 states and 8436 transitions. [2020-10-27 23:43:11,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5712 states and 8436 transitions. [2020-10-27 23:43:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:43:11,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:11,781 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] [2020-10-27 23:43:11,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:43:11,781 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:11,781 INFO L82 PathProgramCache]: Analyzing trace with hash 631882348, now seen corresponding path program 1 times [2020-10-27 23:43:11,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:11,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557345212] [2020-10-27 23:43:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:11,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:16,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:16,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:16,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:43:16,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 23:43:16,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:43:16,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:43:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:43:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:17,188 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:17,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:17,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:17,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:17,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:17,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:17,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:17,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:17,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:17,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:17,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:17,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557345212] [2020-10-27 23:43:17,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:17,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:17,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034889134] [2020-10-27 23:43:17,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:17,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:17,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:17,215 INFO L87 Difference]: Start difference. First operand 5712 states and 8436 transitions. Second operand 11 states. [2020-10-27 23:43:17,470 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 23:43:18,460 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:43:21,743 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:43:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:29,016 INFO L93 Difference]: Finished difference Result 43247 states and 62665 transitions. [2020-10-27 23:43:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:43:29,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 23:43:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:29,069 INFO L225 Difference]: With dead ends: 43247 [2020-10-27 23:43:29,070 INFO L226 Difference]: Without dead ends: 40540 [2020-10-27 23:43:29,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2020-10-27 23:43:29,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40540 states. [2020-10-27 23:43:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40540 to 5755. [2020-10-27 23:43:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5755 states. [2020-10-27 23:43:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 8490 transitions. [2020-10-27 23:43:30,753 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 8490 transitions. Word has length 57 [2020-10-27 23:43:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:30,753 INFO L481 AbstractCegarLoop]: Abstraction has 5755 states and 8490 transitions. [2020-10-27 23:43:30,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 8490 transitions. [2020-10-27 23:43:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:43:30,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:30,755 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] [2020-10-27 23:43:30,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:43:30,755 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:30,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1284391065, now seen corresponding path program 1 times [2020-10-27 23:43:30,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:30,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105490487] [2020-10-27 23:43:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:30,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:35,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:43:35,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:43:35,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4459 [2020-10-27 23:43:35,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:35,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:35,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 23:43:35,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:43:35,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:35,426 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:35,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:35,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:35,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:35,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:35,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:35,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:35,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:35,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:35,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105490487] [2020-10-27 23:43:35,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:35,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:35,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834131812] [2020-10-27 23:43:35,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:35,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:35,451 INFO L87 Difference]: Start difference. First operand 5755 states and 8490 transitions. Second operand 6 states. [2020-10-27 23:43:35,672 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 23:43:36,178 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:43:36,424 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:43:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:38,290 INFO L93 Difference]: Finished difference Result 10984 states and 16269 transitions. [2020-10-27 23:43:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 23:43:38,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 23:43:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:38,302 INFO L225 Difference]: With dead ends: 10984 [2020-10-27 23:43:38,303 INFO L226 Difference]: Without dead ends: 8005 [2020-10-27 23:43:38,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8005 states. [2020-10-27 23:43:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8005 to 7287. [2020-10-27 23:43:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7287 states. [2020-10-27 23:43:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7287 states to 7287 states and 10809 transitions. [2020-10-27 23:43:40,163 INFO L78 Accepts]: Start accepts. Automaton has 7287 states and 10809 transitions. Word has length 57 [2020-10-27 23:43:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:40,163 INFO L481 AbstractCegarLoop]: Abstraction has 7287 states and 10809 transitions. [2020-10-27 23:43:40,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 7287 states and 10809 transitions. [2020-10-27 23:43:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:43:40,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:40,165 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] [2020-10-27 23:43:40,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:43:40,165 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1873808355, now seen corresponding path program 1 times [2020-10-27 23:43:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:40,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380183502] [2020-10-27 23:43:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:40,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:43:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:45,383 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:43:45,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:45,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:45,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:45,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:43:45,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:45,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:45,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:45,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:45,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380183502] [2020-10-27 23:43:45,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:45,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:45,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448654041] [2020-10-27 23:43:45,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:45,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:45,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:45,415 INFO L87 Difference]: Start difference. First operand 7287 states and 10809 transitions. Second operand 6 states. [2020-10-27 23:43:45,611 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:43:46,300 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:43:49,267 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:43:55,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:55,125 INFO L93 Difference]: Finished difference Result 42549 states and 63959 transitions. [2020-10-27 23:43:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:43:55,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 23:43:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:55,170 INFO L225 Difference]: With dead ends: 42549 [2020-10-27 23:43:55,171 INFO L226 Difference]: Without dead ends: 36303 [2020-10-27 23:43:55,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:43:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36303 states. [2020-10-27 23:44:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36303 to 24119. [2020-10-27 23:44:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24119 states. [2020-10-27 23:44:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24119 states to 24119 states and 36075 transitions. [2020-10-27 23:44:00,854 INFO L78 Accepts]: Start accepts. Automaton has 24119 states and 36075 transitions. Word has length 57 [2020-10-27 23:44:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:00,854 INFO L481 AbstractCegarLoop]: Abstraction has 24119 states and 36075 transitions. [2020-10-27 23:44:00,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:44:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24119 states and 36075 transitions. [2020-10-27 23:44:00,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 23:44:00,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:00,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:00,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:44:00,857 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:00,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1330590989, now seen corresponding path program 1 times [2020-10-27 23:44:00,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:00,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594737354] [2020-10-27 23:44:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:00,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:02,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:02,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:05,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:05,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:44:05,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:06,296 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-27 23:44:06,538 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 23:44:06,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:06,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:06,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:06,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:06,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:44:06,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:06,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:06,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:06,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:06,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:06,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594737354] [2020-10-27 23:44:06,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:06,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:06,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919925572] [2020-10-27 23:44:06,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:06,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:06,561 INFO L87 Difference]: Start difference. First operand 24119 states and 36075 transitions. Second operand 10 states. [2020-10-27 23:44:06,836 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-27 23:44:07,813 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 23:44:12,187 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 128