/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=SHALLOWEST --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.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:11:32,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:11:32,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:11:32,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:11:32,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:11:32,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:11:32,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:11:32,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:11:32,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:11:32,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:11:32,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:11:32,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:11:32,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:11:32,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:11:32,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:11:32,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:11:32,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:11:32,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:11:32,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:11:32,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:11:32,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:11:32,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:11:32,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:11:32,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:11:32,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:11:32,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:11:32,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:11:32,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:11:32,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:11:32,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:11:32,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:11:32,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:11:32,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:11:32,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:11:32,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:11:32,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:11:32,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:11:32,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:11:32,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:11:32,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:11:32,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:11:32,857 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 05:11:32,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:11:32,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:11:32,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:11:32,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:11:32,922 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:11:32,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:11:32,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:11:32,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:11:32,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:11:32,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:11:32,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:11:32,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:11:32,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:11:32,924 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:11:32,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:11:32,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:11:32,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:11:32,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:11:32,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:11:32,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:11:32,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:11:32,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:11:32,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:11:32,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:11:32,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:11:32,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:11:32,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:11:32,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:11:32,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:11:32,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:11:33,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:11:33,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:11:33,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:11:33,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:11:33,332 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:11:33,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:11:33,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e99497710/bd1d1f381eb24cbdbf587b3ec001fcde/FLAG6940bb963 [2020-10-27 05:11:34,100 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:11:34,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:11:34,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e99497710/bd1d1f381eb24cbdbf587b3ec001fcde/FLAG6940bb963 [2020-10-27 05:11:34,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e99497710/bd1d1f381eb24cbdbf587b3ec001fcde [2020-10-27 05:11:34,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:11:34,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:11:34,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:11:34,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:11:34,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:11:34,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:11:34" (1/1) ... [2020-10-27 05:11:34,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4157292c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:34, skipping insertion in model container [2020-10-27 05:11:34,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:11:34" (1/1) ... [2020-10-27 05:11:34,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:11:34,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:11:35,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:11:35,041 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:11:35,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:11:35,321 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:11:35,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35 WrapperNode [2020-10-27 05:11:35,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:11:35,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:11:35,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:11:35,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:11:35,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (1/1) ... [2020-10-27 05:11:35,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (1/1) ... [2020-10-27 05:11:35,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (1/1) ... [2020-10-27 05:11:35,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (1/1) ... [2020-10-27 05:11:35,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (1/1) ... [2020-10-27 05:11:35,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (1/1) ... [2020-10-27 05:11:35,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (1/1) ... [2020-10-27 05:11:35,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:11:35,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:11:35,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:11:35,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:11:35,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (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 05:11:35,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:11:35,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:11:35,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:11:35,548 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:11:35,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:11:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:11:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:11:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:11:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:11:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:11:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:11:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:11:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:11:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:11:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:11:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:11:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:11:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:11:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:11:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:11:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:11:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:11:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:11:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:11:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:11:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:11:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:11:36,808 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:11:36,808 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:11:36,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:11:36 BoogieIcfgContainer [2020-10-27 05:11:36,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:11:36,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:11:36,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:11:36,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:11:36,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:11:34" (1/3) ... [2020-10-27 05:11:36,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f2ac54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:11:36, skipping insertion in model container [2020-10-27 05:11:36,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:11:35" (2/3) ... [2020-10-27 05:11:36,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f2ac54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:11:36, skipping insertion in model container [2020-10-27 05:11:36,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:11:36" (3/3) ... [2020-10-27 05:11:36,819 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:11:36,832 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:11:36,837 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:11:36,857 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:11:36,885 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:11:36,886 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:11:36,886 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:11:36,886 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:11:36,886 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:11:36,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:11:36,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:11:36,886 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:11:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2020-10-27 05:11:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 05:11:36,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:36,921 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 05:11:36,921 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash 288360738, now seen corresponding path program 1 times [2020-10-27 05:11:36,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:36,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605992716] [2020-10-27 05:11:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:37,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:37,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:37,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:38,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:39,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:41,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:41,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:41,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:42,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:42,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 05:11:42,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:11:42,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:11:42,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:11:42,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:42,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:11:42,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:11:42,689 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:11:42,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:42,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:42,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:42,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:42,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:42,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 05:11:42,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:42,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:42,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:42,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:42,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:42,810 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 05:11:42,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605992716] [2020-10-27 05:11:42,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:42,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:11:42,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551359766] [2020-10-27 05:11:42,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:11:42,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:42,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:11:42,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:11:42,849 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 6 states. [2020-10-27 05:11:43,260 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:11:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:44,519 INFO L93 Difference]: Finished difference Result 346 states and 590 transitions. [2020-10-27 05:11:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:11:44,524 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 05:11:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:44,535 INFO L225 Difference]: With dead ends: 346 [2020-10-27 05:11:44,536 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 05:11:44,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:11:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 05:11:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-27 05:11:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 05:11:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 221 transitions. [2020-10-27 05:11:44,640 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 221 transitions. Word has length 52 [2020-10-27 05:11:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:44,640 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 221 transitions. [2020-10-27 05:11:44,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:11:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 221 transitions. [2020-10-27 05:11:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:44,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:44,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:11:44,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:11:44,654 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:44,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:44,655 INFO L82 PathProgramCache]: Analyzing trace with hash 467101882, now seen corresponding path program 1 times [2020-10-27 05:11:44,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:44,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947200863] [2020-10-27 05:11:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:44,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:44,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:45,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:46,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:48,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:48,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:49,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:49,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:11:49,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:11:49,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:11:49,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:11:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:11:49,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:11:49,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:50,371 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:11:50,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:11:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:50,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:50,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:11:50,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:11:50,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:11:50,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 05:11:50,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:11:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:11:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:11:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:11:50,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:11:50,476 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 05:11:50,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947200863] [2020-10-27 05:11:50,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:11:50,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:11:50,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973157345] [2020-10-27 05:11:50,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:11:50,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:11:50,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:11:50,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:11:50,482 INFO L87 Difference]: Start difference. First operand 174 states and 221 transitions. Second operand 12 states. [2020-10-27 05:11:51,417 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 199 [2020-10-27 05:11:53,667 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 197 [2020-10-27 05:11:54,094 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:11:54,712 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 190 [2020-10-27 05:11:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:11:55,475 INFO L93 Difference]: Finished difference Result 610 states and 836 transitions. [2020-10-27 05:11:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:11:55,476 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-27 05:11:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:11:55,485 INFO L225 Difference]: With dead ends: 610 [2020-10-27 05:11:55,486 INFO L226 Difference]: Without dead ends: 533 [2020-10-27 05:11:55,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:11:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-10-27 05:11:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 185. [2020-10-27 05:11:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-27 05:11:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 236 transitions. [2020-10-27 05:11:55,542 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 236 transitions. Word has length 53 [2020-10-27 05:11:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:11:55,542 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 236 transitions. [2020-10-27 05:11:55,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:11:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 236 transitions. [2020-10-27 05:11:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 05:11:55,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:11:55,547 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 05:11:55,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:11:55,547 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:11:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:11:55,550 INFO L82 PathProgramCache]: Analyzing trace with hash 558658039, now seen corresponding path program 1 times [2020-10-27 05:11:55,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:11:55,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730084482] [2020-10-27 05:11:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:11:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:11:55,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:55,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:55,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:55,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:55,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:56,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:56,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:57,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:57,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:57,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:58,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:11:59,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:00,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 05:12:00,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 05:12:00,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:12:00,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:12:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:12:00,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:00,952 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:12:00,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:00,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:00,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:00,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:00,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:00,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:12:00,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:00,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:00,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:00,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:00,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:01,014 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 05:12:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730084482] [2020-10-27 05:12:01,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:01,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:12:01,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257395976] [2020-10-27 05:12:01,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:12:01,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:01,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:12:01,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:12:01,017 INFO L87 Difference]: Start difference. First operand 185 states and 236 transitions. Second operand 7 states. [2020-10-27 05:12:01,352 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:12:02,278 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:12:03,027 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:12:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:03,121 INFO L93 Difference]: Finished difference Result 479 states and 650 transitions. [2020-10-27 05:12:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:12:03,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-27 05:12:03,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:03,126 INFO L225 Difference]: With dead ends: 479 [2020-10-27 05:12:03,126 INFO L226 Difference]: Without dead ends: 358 [2020-10-27 05:12:03,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:12:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-27 05:12:03,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 193. [2020-10-27 05:12:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-27 05:12:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 243 transitions. [2020-10-27 05:12:03,153 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 243 transitions. Word has length 53 [2020-10-27 05:12:03,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:03,153 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 243 transitions. [2020-10-27 05:12:03,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:12:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 243 transitions. [2020-10-27 05:12:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:12:03,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:03,155 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 05:12:03,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:12:03,155 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:03,156 INFO L82 PathProgramCache]: Analyzing trace with hash 270516704, now seen corresponding path program 1 times [2020-10-27 05:12:03,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:03,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324754977] [2020-10-27 05:12:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:03,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:04,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:05,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:06,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:07,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:08,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:08,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:08,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:12:08,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:12:08,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:12:08,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:08,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:12:08,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:08,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:12:08,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:08,920 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:12:08,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:08,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:08,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:08,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:08,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:08,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:12:08,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:08,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:08,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:08,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:08,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:12:08,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324754977] [2020-10-27 05:12:08,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:08,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:12:08,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119505672] [2020-10-27 05:12:08,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:12:08,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:08,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:12:08,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:12:08,990 INFO L87 Difference]: Start difference. First operand 193 states and 243 transitions. Second operand 13 states. [2020-10-27 05:12:09,862 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 198 [2020-10-27 05:12:10,462 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-27 05:12:10,599 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-27 05:12:12,590 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 199 [2020-10-27 05:12:12,916 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:12:13,468 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:12:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:14,265 INFO L93 Difference]: Finished difference Result 590 states and 777 transitions. [2020-10-27 05:12:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:12:14,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-27 05:12:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:14,270 INFO L225 Difference]: With dead ends: 590 [2020-10-27 05:12:14,270 INFO L226 Difference]: Without dead ends: 459 [2020-10-27 05:12:14,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:12:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-27 05:12:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 235. [2020-10-27 05:12:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 05:12:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 311 transitions. [2020-10-27 05:12:14,310 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 311 transitions. Word has length 54 [2020-10-27 05:12:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:14,310 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 311 transitions. [2020-10-27 05:12:14,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:12:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 311 transitions. [2020-10-27 05:12:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:14,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:14,312 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 05:12:14,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:12:14,312 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash -235106783, now seen corresponding path program 1 times [2020-10-27 05:12:14,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:14,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117153200] [2020-10-27 05:12:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:14,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:14,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:15,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:16,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:19,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:19,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:12:19,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:12:19,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:12:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:12:19,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:19,848 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:12:19,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:19,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:19,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:19,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:19,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:19,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:12:19,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:19,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:19,920 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 05:12:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117153200] [2020-10-27 05:12:19,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:19,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:12:19,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968416441] [2020-10-27 05:12:19,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:12:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:12:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:12:19,925 INFO L87 Difference]: Start difference. First operand 235 states and 311 transitions. Second operand 11 states. [2020-10-27 05:12:20,280 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:12:21,415 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:12:21,813 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:12:22,122 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:12:23,077 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:12:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:23,145 INFO L93 Difference]: Finished difference Result 566 states and 773 transitions. [2020-10-27 05:12:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:12:23,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 05:12:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:23,150 INFO L225 Difference]: With dead ends: 566 [2020-10-27 05:12:23,150 INFO L226 Difference]: Without dead ends: 559 [2020-10-27 05:12:23,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:12:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-10-27 05:12:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 247. [2020-10-27 05:12:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 05:12:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 327 transitions. [2020-10-27 05:12:23,194 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 327 transitions. Word has length 55 [2020-10-27 05:12:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:23,195 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 327 transitions. [2020-10-27 05:12:23,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:12:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 327 transitions. [2020-10-27 05:12:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:23,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:23,196 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 05:12:23,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:12:23,196 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash -265408560, now seen corresponding path program 1 times [2020-10-27 05:12:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:23,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184306726] [2020-10-27 05:12:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:23,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:23,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:24,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:25,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:26,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:28,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:28,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:28,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:12:28,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:12:28,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:12:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:28,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:12:28,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:28,835 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:12:28,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:28,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:28,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:28,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:28,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:28,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:12:28,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:28,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:28,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:28,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:28,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:28,904 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 05:12:28,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184306726] [2020-10-27 05:12:28,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:28,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:12:28,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300688523] [2020-10-27 05:12:28,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:12:28,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:28,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:12:28,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:12:28,908 INFO L87 Difference]: Start difference. First operand 247 states and 327 transitions. Second operand 14 states. [2020-10-27 05:12:29,807 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 208 [2020-10-27 05:12:31,560 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-27 05:12:32,047 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 05:12:32,425 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:12:32,900 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:12:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:33,501 INFO L93 Difference]: Finished difference Result 464 states and 617 transitions. [2020-10-27 05:12:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:12:33,502 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-27 05:12:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:33,510 INFO L225 Difference]: With dead ends: 464 [2020-10-27 05:12:33,510 INFO L226 Difference]: Without dead ends: 456 [2020-10-27 05:12:33,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 05:12:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-27 05:12:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 247. [2020-10-27 05:12:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 05:12:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 325 transitions. [2020-10-27 05:12:33,555 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 325 transitions. Word has length 55 [2020-10-27 05:12:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:33,555 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 325 transitions. [2020-10-27 05:12:33,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:12:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 325 transitions. [2020-10-27 05:12:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:33,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:33,556 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 05:12:33,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:12:33,557 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1254017512, now seen corresponding path program 1 times [2020-10-27 05:12:33,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:33,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132749042] [2020-10-27 05:12:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:33,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:33,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:35,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:36,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:38,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:38,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:38,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 05:12:38,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:12:38,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:12:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:12:38,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:39,267 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:12:39,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:39,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:39,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:39,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:39,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:39,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:12:39,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:39,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:39,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:39,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:39,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:39,323 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 05:12:39,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132749042] [2020-10-27 05:12:39,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:39,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:12:39,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823179735] [2020-10-27 05:12:39,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:12:39,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:39,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:12:39,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:12:39,326 INFO L87 Difference]: Start difference. First operand 247 states and 325 transitions. Second operand 15 states. [2020-10-27 05:12:39,878 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-27 05:12:41,523 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 05:12:41,952 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:12:42,289 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:12:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:12:42,863 INFO L93 Difference]: Finished difference Result 353 states and 454 transitions. [2020-10-27 05:12:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:12:42,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-27 05:12:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:12:42,867 INFO L225 Difference]: With dead ends: 353 [2020-10-27 05:12:42,867 INFO L226 Difference]: Without dead ends: 348 [2020-10-27 05:12:42,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:12:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-27 05:12:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 256. [2020-10-27 05:12:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-27 05:12:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 338 transitions. [2020-10-27 05:12:42,907 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 338 transitions. Word has length 55 [2020-10-27 05:12:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:12:42,908 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 338 transitions. [2020-10-27 05:12:42,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:12:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 338 transitions. [2020-10-27 05:12:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:12:42,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:12:42,909 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 05:12:42,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:12:42,910 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:12:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:12:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1162461355, now seen corresponding path program 1 times [2020-10-27 05:12:42,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:12:42,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130894912] [2020-10-27 05:12:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:12:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:43,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:45,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:47,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:47,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:12:47,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 05:12:47,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:12:47,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:47,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:12:47,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:12:47,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:12:47,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:50,803 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:12:50,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:12:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:12:50,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:12:50,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:12:50,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:12:50,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:12:50,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:12:50,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:12:50,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:12:50,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:12:50,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:12:50,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:12:50,876 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 05:12:50,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130894912] [2020-10-27 05:12:50,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:12:50,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:12:50,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912112947] [2020-10-27 05:12:50,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:12:50,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:12:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:12:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=170, Unknown=1, NotChecked=0, Total=210 [2020-10-27 05:12:50,885 INFO L87 Difference]: Start difference. First operand 256 states and 338 transitions. Second operand 15 states. [2020-10-27 05:12:51,039 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-27 05:13:06,685 WARN L193 SmtUtils]: Spent 15.58 s on a formula simplification. DAG size of input: 219 DAG size of output: 218 [2020-10-27 05:13:11,650 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 206 [2020-10-27 05:13:12,200 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-27 05:13:12,512 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:13:15,084 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-10-27 05:13:21,542 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2020-10-27 05:13:30,977 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:13:31,358 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:13:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:31,394 INFO L93 Difference]: Finished difference Result 864 states and 1192 transitions. [2020-10-27 05:13:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 05:13:31,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-27 05:13:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:31,398 INFO L225 Difference]: With dead ends: 864 [2020-10-27 05:13:31,398 INFO L226 Difference]: Without dead ends: 719 [2020-10-27 05:13:31,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=380, Invalid=1259, Unknown=1, NotChecked=0, Total=1640 [2020-10-27 05:13:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2020-10-27 05:13:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 344. [2020-10-27 05:13:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-27 05:13:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 469 transitions. [2020-10-27 05:13:31,498 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 469 transitions. Word has length 55 [2020-10-27 05:13:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:31,499 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 469 transitions. [2020-10-27 05:13:31,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:13:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 469 transitions. [2020-10-27 05:13:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:13:31,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:31,500 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 05:13:31,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:13:31,500 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1061914700, now seen corresponding path program 1 times [2020-10-27 05:13:31,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:31,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835285728] [2020-10-27 05:13:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:31,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:31,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:33,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:34,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:35,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:36,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:36,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:13:36,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 05:13:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:13:36,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:13:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:36,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:13:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:37,088 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:13:37,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:37,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:37,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:37,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:37,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:37,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:13:37,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:37,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:37,154 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 05:13:37,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835285728] [2020-10-27 05:13:37,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:37,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:13:37,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693581186] [2020-10-27 05:13:37,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:13:37,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:37,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:13:37,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:13:37,156 INFO L87 Difference]: Start difference. First operand 344 states and 469 transitions. Second operand 12 states. [2020-10-27 05:13:37,907 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 194 [2020-10-27 05:13:40,016 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 197 [2020-10-27 05:13:40,800 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 198 [2020-10-27 05:13:43,154 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 192 [2020-10-27 05:13:43,896 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 193 [2020-10-27 05:13:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:44,360 INFO L93 Difference]: Finished difference Result 1144 states and 1611 transitions. [2020-10-27 05:13:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 05:13:44,361 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-27 05:13:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:44,368 INFO L225 Difference]: With dead ends: 1144 [2020-10-27 05:13:44,368 INFO L226 Difference]: Without dead ends: 1138 [2020-10-27 05:13:44,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 05:13:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2020-10-27 05:13:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 344. [2020-10-27 05:13:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-27 05:13:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 468 transitions. [2020-10-27 05:13:44,464 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 468 transitions. Word has length 55 [2020-10-27 05:13:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:44,464 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 468 transitions. [2020-10-27 05:13:44,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:13:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 468 transitions. [2020-10-27 05:13:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:44,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:44,465 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 05:13:44,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:13:44,466 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -251027223, now seen corresponding path program 1 times [2020-10-27 05:13:44,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:44,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344854734] [2020-10-27 05:13:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:44,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:44,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:45,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:45,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:45,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:45,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:45,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:46,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:49,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:13:49,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:49,942 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:13:49,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:49,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:49,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:49,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:49,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:13:49,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:49,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:49,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:50,005 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 05:13:50,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344854734] [2020-10-27 05:13:50,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:50,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:50,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481163601] [2020-10-27 05:13:50,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:13:50,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:50,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:13:50,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:13:50,015 INFO L87 Difference]: Start difference. First operand 344 states and 468 transitions. Second operand 11 states. [2020-10-27 05:13:50,777 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 194 [2020-10-27 05:13:52,617 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2020-10-27 05:13:53,385 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 190 [2020-10-27 05:13:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:13:54,239 INFO L93 Difference]: Finished difference Result 866 states and 1227 transitions. [2020-10-27 05:13:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:13:54,240 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:13:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:13:54,244 INFO L225 Difference]: With dead ends: 866 [2020-10-27 05:13:54,245 INFO L226 Difference]: Without dead ends: 776 [2020-10-27 05:13:54,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:13:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-10-27 05:13:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 338. [2020-10-27 05:13:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-27 05:13:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 457 transitions. [2020-10-27 05:13:54,344 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 457 transitions. Word has length 56 [2020-10-27 05:13:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:13:54,344 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 457 transitions. [2020-10-27 05:13:54,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:13:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 457 transitions. [2020-10-27 05:13:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:13:54,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:13:54,345 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 05:13:54,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:13:54,346 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:13:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:13:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash 4820378, now seen corresponding path program 1 times [2020-10-27 05:13:54,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:13:54,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213240892] [2020-10-27 05:13:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:13:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:54,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:54,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:55,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:56,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:13:59,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:13:59,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:13:59,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:13:59,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:13:59,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:13:59,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,804 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:13:59,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:13:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:13:59,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:13:59,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:13:59,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:13:59,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:13:59,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:13:59,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:13:59,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:13:59,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:13:59,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:13:59,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:13:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:13:59,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213240892] [2020-10-27 05:13:59,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:13:59,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:13:59,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247220850] [2020-10-27 05:13:59,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:13:59,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:13:59,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:13:59,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:13:59,867 INFO L87 Difference]: Start difference. First operand 338 states and 457 transitions. Second operand 11 states. [2020-10-27 05:14:00,245 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 05:14:01,509 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:14:01,877 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:14:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:03,349 INFO L93 Difference]: Finished difference Result 1183 states and 1675 transitions. [2020-10-27 05:14:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:14:03,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:14:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:03,360 INFO L225 Difference]: With dead ends: 1183 [2020-10-27 05:14:03,360 INFO L226 Difference]: Without dead ends: 1169 [2020-10-27 05:14:03,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:14:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2020-10-27 05:14:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 333. [2020-10-27 05:14:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-27 05:14:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 450 transitions. [2020-10-27 05:14:03,476 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 450 transitions. Word has length 56 [2020-10-27 05:14:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:03,476 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 450 transitions. [2020-10-27 05:14:03,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:14:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 450 transitions. [2020-10-27 05:14:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:03,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:03,477 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 05:14:03,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:14:03,478 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:03,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1934724857, now seen corresponding path program 1 times [2020-10-27 05:14:03,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:03,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158096521] [2020-10-27 05:14:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:03,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:04,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:06,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:06,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:06,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:06,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2572 [2020-10-27 05:14:06,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:06,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:14:06,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:06,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:14:06,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:07,072 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:07,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:07,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:07,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:07,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:07,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:14:07,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:07,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:07,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:07,124 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 05:14:07,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158096521] [2020-10-27 05:14:07,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:07,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:14:07,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979374434] [2020-10-27 05:14:07,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:14:07,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:14:07,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:14:07,127 INFO L87 Difference]: Start difference. First operand 333 states and 450 transitions. Second operand 12 states. [2020-10-27 05:14:07,581 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 05:14:07,835 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-27 05:14:08,075 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-27 05:14:08,257 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-27 05:14:08,466 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-27 05:14:08,672 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-27 05:14:09,465 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-27 05:14:10,795 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 208 [2020-10-27 05:14:11,187 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 05:14:11,950 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2020-10-27 05:14:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:12,580 INFO L93 Difference]: Finished difference Result 576 states and 796 transitions. [2020-10-27 05:14:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 05:14:12,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-27 05:14:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:12,582 INFO L225 Difference]: With dead ends: 576 [2020-10-27 05:14:12,582 INFO L226 Difference]: Without dead ends: 406 [2020-10-27 05:14:12,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:14:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-27 05:14:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 322. [2020-10-27 05:14:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-27 05:14:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 433 transitions. [2020-10-27 05:14:12,673 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 433 transitions. Word has length 57 [2020-10-27 05:14:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:12,673 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 433 transitions. [2020-10-27 05:14:12,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:14:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 433 transitions. [2020-10-27 05:14:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:12,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:12,674 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 05:14:12,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:14:12,675 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash -141779668, now seen corresponding path program 1 times [2020-10-27 05:14:12,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:12,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582631266] [2020-10-27 05:14:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:12,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:12,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:13,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:13,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:13,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:14,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:15,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:15,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:15,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:16,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:17,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:17,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:17,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 05:14:17,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 05:14:17,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 05:14:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:17,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:14:17,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:18,230 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-10-27 05:14:18,391 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-27 05:14:19,032 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:19,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:19,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:19,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:19,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:19,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:19,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:14:19,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:19,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:19,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:19,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:19,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:19,077 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 05:14:19,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582631266] [2020-10-27 05:14:19,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:19,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:14:19,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242212535] [2020-10-27 05:14:19,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 05:14:19,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 05:14:19,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:14:19,080 INFO L87 Difference]: Start difference. First operand 322 states and 433 transitions. Second operand 16 states. [2020-10-27 05:14:19,507 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:14:20,085 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-27 05:14:21,705 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:14:22,089 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:14:22,573 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:14:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:23,324 INFO L93 Difference]: Finished difference Result 734 states and 1020 transitions. [2020-10-27 05:14:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:14:23,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-27 05:14:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:23,327 INFO L225 Difference]: With dead ends: 734 [2020-10-27 05:14:23,327 INFO L226 Difference]: Without dead ends: 562 [2020-10-27 05:14:23,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:14:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-10-27 05:14:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 320. [2020-10-27 05:14:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-27 05:14:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 429 transitions. [2020-10-27 05:14:23,424 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 429 transitions. Word has length 57 [2020-10-27 05:14:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:23,424 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 429 transitions. [2020-10-27 05:14:23,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 05:14:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 429 transitions. [2020-10-27 05:14:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:23,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:23,425 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 05:14:23,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:14:23,425 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1035542609, now seen corresponding path program 1 times [2020-10-27 05:14:23,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:23,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710427542] [2020-10-27 05:14:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:23,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:23,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:24,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:25,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:25,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:25,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:25,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2304 [2020-10-27 05:14:25,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:14:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 05:14:25,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:26,126 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:26,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:26,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:26,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:26,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:26,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:14:26,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:26,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:26,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:26,152 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 05:14:26,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710427542] [2020-10-27 05:14:26,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:26,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:14:26,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177213869] [2020-10-27 05:14:26,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:14:26,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:26,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:14:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:14:26,156 INFO L87 Difference]: Start difference. First operand 320 states and 429 transitions. Second operand 8 states. [2020-10-27 05:14:26,508 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:14:27,281 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:14:27,610 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:14:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:27,928 INFO L93 Difference]: Finished difference Result 332 states and 439 transitions. [2020-10-27 05:14:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:14:27,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 05:14:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:27,930 INFO L225 Difference]: With dead ends: 332 [2020-10-27 05:14:27,930 INFO L226 Difference]: Without dead ends: 305 [2020-10-27 05:14:27,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-27 05:14:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-10-27 05:14:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-27 05:14:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 399 transitions. [2020-10-27 05:14:28,018 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 399 transitions. Word has length 57 [2020-10-27 05:14:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:28,018 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 399 transitions. [2020-10-27 05:14:28,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:14:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 399 transitions. [2020-10-27 05:14:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:14:28,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:28,019 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 05:14:28,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:14:28,019 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:28,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1534292651, now seen corresponding path program 1 times [2020-10-27 05:14:28,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:28,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050403026] [2020-10-27 05:14:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:28,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:29,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:29,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:29,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:29,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:31,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:31,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:14:31,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:14:31,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3315 [2020-10-27 05:14:31,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:31,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:14:31,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:31,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:14:31,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:32,191 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:32,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:32,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:32,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:32,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:32,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:14:32,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:32,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:32,234 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 05:14:32,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050403026] [2020-10-27 05:14:32,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:32,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:14:32,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699710704] [2020-10-27 05:14:32,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:14:32,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:14:32,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:14:32,236 INFO L87 Difference]: Start difference. First operand 295 states and 399 transitions. Second operand 15 states. [2020-10-27 05:14:32,432 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-27 05:14:33,455 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 227 [2020-10-27 05:14:33,907 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-27 05:14:35,313 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 05:14:35,731 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-10-27 05:14:36,089 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:14:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:36,727 INFO L93 Difference]: Finished difference Result 529 states and 721 transitions. [2020-10-27 05:14:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:14:36,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-27 05:14:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:36,730 INFO L225 Difference]: With dead ends: 529 [2020-10-27 05:14:36,730 INFO L226 Difference]: Without dead ends: 524 [2020-10-27 05:14:36,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:14:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-27 05:14:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2020-10-27 05:14:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 05:14:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 408 transitions. [2020-10-27 05:14:36,830 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 408 transitions. Word has length 57 [2020-10-27 05:14:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:36,830 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 408 transitions. [2020-10-27 05:14:36,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:14:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 408 transitions. [2020-10-27 05:14:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:14:36,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:36,831 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 05:14:36,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:14:36,831 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash 536042336, now seen corresponding path program 1 times [2020-10-27 05:14:36,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:36,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178394534] [2020-10-27 05:14:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:36,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:36,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:37,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:37,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:37,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:14:38,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:39,184 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:39,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:39,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:39,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:39,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:39,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:39,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:14:39,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:39,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:39,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:39,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:39,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:39,231 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 05:14:39,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178394534] [2020-10-27 05:14:39,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:39,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:14:39,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14525350] [2020-10-27 05:14:39,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:14:39,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:14:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:14:39,234 INFO L87 Difference]: Start difference. First operand 301 states and 408 transitions. Second operand 9 states. [2020-10-27 05:14:39,658 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:14:40,550 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:14:40,952 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:14:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:41,337 INFO L93 Difference]: Finished difference Result 515 states and 705 transitions. [2020-10-27 05:14:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 05:14:41,338 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 05:14:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:41,339 INFO L225 Difference]: With dead ends: 515 [2020-10-27 05:14:41,339 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 05:14:41,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:14:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 05:14:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 284. [2020-10-27 05:14:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 05:14:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 383 transitions. [2020-10-27 05:14:41,417 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 383 transitions. Word has length 58 [2020-10-27 05:14:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:41,417 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 383 transitions. [2020-10-27 05:14:41,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:14:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 383 transitions. [2020-10-27 05:14:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:14:41,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:41,418 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 05:14:41,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:14:41,418 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:41,419 INFO L82 PathProgramCache]: Analyzing trace with hash 271478445, now seen corresponding path program 1 times [2020-10-27 05:14:41,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:41,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047087596] [2020-10-27 05:14:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:42,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:43,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:44,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:44,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:45,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:14:46,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:47,030 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-27 05:14:47,648 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:47,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:47,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:47,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:47,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:47,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:47,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:14:47,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:47,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:14:47,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:14:47,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:47,693 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 05:14:47,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047087596] [2020-10-27 05:14:47,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:47,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:14:47,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484696758] [2020-10-27 05:14:47,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 05:14:47,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 05:14:47,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:14:47,695 INFO L87 Difference]: Start difference. First operand 284 states and 383 transitions. Second operand 16 states. [2020-10-27 05:14:48,189 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 05:14:48,711 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-27 05:14:50,305 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:14:50,765 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:14:51,297 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 05:14:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:52,297 INFO L93 Difference]: Finished difference Result 422 states and 561 transitions. [2020-10-27 05:14:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:14:52,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-10-27 05:14:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:52,301 INFO L225 Difference]: With dead ends: 422 [2020-10-27 05:14:52,301 INFO L226 Difference]: Without dead ends: 417 [2020-10-27 05:14:52,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:14:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-27 05:14:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 271. [2020-10-27 05:14:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-27 05:14:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 365 transitions. [2020-10-27 05:14:52,395 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 365 transitions. Word has length 58 [2020-10-27 05:14:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:52,395 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 365 transitions. [2020-10-27 05:14:52,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 05:14:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 365 transitions. [2020-10-27 05:14:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:14:52,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:52,396 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 05:14:52,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:14:52,397 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash -349621940, now seen corresponding path program 1 times [2020-10-27 05:14:52,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:52,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865920282] [2020-10-27 05:14:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:52,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:52,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:55,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:55,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:14:55,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:14:55,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2664 [2020-10-27 05:14:55,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:55,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:14:55,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:14:55,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:14:55,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:55,555 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:14:55,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:14:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:55,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:55,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:14:55,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:14:55,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:14:55,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:14:55,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:14:55,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:14:55,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:14:55,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:14:55,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:14:55,600 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 05:14:55,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865920282] [2020-10-27 05:14:55,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:14:55,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:14:55,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805471259] [2020-10-27 05:14:55,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:14:55,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:14:55,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:14:55,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:14:55,602 INFO L87 Difference]: Start difference. First operand 271 states and 365 transitions. Second operand 11 states. [2020-10-27 05:14:56,052 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 05:14:57,313 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:14:57,744 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:14:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:14:59,774 INFO L93 Difference]: Finished difference Result 1317 states and 1873 transitions. [2020-10-27 05:14:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:14:59,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-27 05:14:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:14:59,778 INFO L225 Difference]: With dead ends: 1317 [2020-10-27 05:14:59,779 INFO L226 Difference]: Without dead ends: 1128 [2020-10-27 05:14:59,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2020-10-27 05:14:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-10-27 05:14:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 275. [2020-10-27 05:14:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-27 05:14:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 369 transitions. [2020-10-27 05:14:59,886 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 369 transitions. Word has length 58 [2020-10-27 05:14:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:14:59,886 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 369 transitions. [2020-10-27 05:14:59,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:14:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 369 transitions. [2020-10-27 05:14:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:14:59,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:14:59,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:14:59,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:14:59,887 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:14:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:14:59,888 INFO L82 PathProgramCache]: Analyzing trace with hash -205292812, now seen corresponding path program 1 times [2020-10-27 05:14:59,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:14:59,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707804303] [2020-10-27 05:14:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:14:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:14:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:14:59,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:00,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:00,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:00,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:03,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:03,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:15:03,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:15:03,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3469 [2020-10-27 05:15:03,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:03,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 05:15:03,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:15:03,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:15:03,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:04,178 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:15:04,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:04,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:04,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:04,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:04,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:04,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:15:04,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:04,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:15:04,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:04,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:15:04,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:04,250 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 05:15:04,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707804303] [2020-10-27 05:15:04,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:04,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 05:15:04,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648248061] [2020-10-27 05:15:04,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 05:15:04,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 05:15:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:15:04,255 INFO L87 Difference]: Start difference. First operand 275 states and 369 transitions. Second operand 17 states. [2020-10-27 05:15:04,408 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-27 05:15:05,380 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 202 [2020-10-27 05:15:05,876 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-27 05:15:07,546 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:15:07,939 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:15:08,380 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:15:08,898 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:15:09,110 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-27 05:15:09,453 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-27 05:15:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:15:10,797 INFO L93 Difference]: Finished difference Result 862 states and 1211 transitions. [2020-10-27 05:15:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 05:15:10,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-27 05:15:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:15:10,800 INFO L225 Difference]: With dead ends: 862 [2020-10-27 05:15:10,800 INFO L226 Difference]: Without dead ends: 684 [2020-10-27 05:15:10,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 05:15:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2020-10-27 05:15:10,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 279. [2020-10-27 05:15:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-27 05:15:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 374 transitions. [2020-10-27 05:15:10,904 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 374 transitions. Word has length 59 [2020-10-27 05:15:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:15:10,905 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 374 transitions. [2020-10-27 05:15:10,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 05:15:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 374 transitions. [2020-10-27 05:15:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:15:10,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:15:10,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:15:10,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:15:10,906 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:15:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:15:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1844506341, now seen corresponding path program 1 times [2020-10-27 05:15:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:15:10,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768482029] [2020-10-27 05:15:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:15:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:10,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:11,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:11,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:11,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:12,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:12,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:15:12,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:15:12,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1106 [2020-10-27 05:15:12,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:12,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:15:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:15:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:15:12,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:12,982 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:15:12,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:15:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:15:12,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:15:13,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:15:13,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:15:13,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:15:13,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:15:13,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:15:13,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:15:13,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:15:13,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:15:13,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:15:13,033 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 05:15:13,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768482029] [2020-10-27 05:15:13,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:15:13,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-27 05:15:13,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170706744] [2020-10-27 05:15:13,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:15:13,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:15:13,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:15:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:15:13,036 INFO L87 Difference]: Start difference. First operand 279 states and 374 transitions. Second operand 15 states. [2020-10-27 05:15:13,356 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70