/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:37:12,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:37:12,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:37:12,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:37:12,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:37:12,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:37:12,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:37:12,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:37:12,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:37:12,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:37:12,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:37:12,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:37:12,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:37:12,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:37:12,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:37:12,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:37:12,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:37:12,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:37:12,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:37:12,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:37:12,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:37:12,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:37:12,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:37:12,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:37:12,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:37:12,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:37:12,708 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:37:12,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:37:12,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:37:12,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:37:12,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:37:12,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:37:12,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:37:12,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:37:12,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:37:12,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:37:12,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:37:12,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:37:12,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:37:12,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:37:12,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:37:12,739 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 [2020-10-29 13:37:12,791 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:37:12,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:37:12,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:37:12,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:37:12,797 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:37:12,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:37:12,797 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:37:12,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:37:12,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:37:12,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:37:12,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:37:12,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:37:12,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:37:12,800 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:37:12,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:37:12,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:37:12,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:37:12,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:37:12,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:37:12,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:37:12,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:37:12,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:37:12,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:37:12,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:37:12,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:37:12,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:37:12,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:37:12,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:37:12,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:37:12,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:37:13,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:37:13,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:37:13,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:37:13,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:37:13,264 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:37:13,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-29 13:37:13,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f11a2ec0b/86c839e7151542f0bb8cdfb3452e5dd1/FLAG139529fec [2020-10-29 13:37:14,091 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:37:14,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-29 13:37:14,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f11a2ec0b/86c839e7151542f0bb8cdfb3452e5dd1/FLAG139529fec [2020-10-29 13:37:14,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f11a2ec0b/86c839e7151542f0bb8cdfb3452e5dd1 [2020-10-29 13:37:14,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:37:14,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:37:14,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:37:14,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:37:14,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:37:14,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:37:14" (1/1) ... [2020-10-29 13:37:14,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1e436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:14, skipping insertion in model container [2020-10-29 13:37:14,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:37:14" (1/1) ... [2020-10-29 13:37:14,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:37:14,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:37:15,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:37:15,209 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:37:15,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:37:15,502 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:37:15,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15 WrapperNode [2020-10-29 13:37:15,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:37:15,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:37:15,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:37:15,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:37:15,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (1/1) ... [2020-10-29 13:37:15,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (1/1) ... [2020-10-29 13:37:15,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (1/1) ... [2020-10-29 13:37:15,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (1/1) ... [2020-10-29 13:37:15,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (1/1) ... [2020-10-29 13:37:15,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (1/1) ... [2020-10-29 13:37:15,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (1/1) ... [2020-10-29 13:37:15,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:37:15,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:37:15,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:37:15,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:37:15,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (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 [2020-10-29 13:37:15,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:37:15,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:37:15,775 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:37:15,775 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:37:15,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:37:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:37:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:37:15,775 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:37:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:37:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:37:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:37:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:37:15,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:37:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:37:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:37:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:37:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:37:15,777 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:37:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:37:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:37:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:37:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:37:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:37:15,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:37:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:37:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:37:15,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:37:18,048 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:37:18,048 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:37:18,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:37:18 BoogieIcfgContainer [2020-10-29 13:37:18,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:37:18,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:37:18,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:37:18,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:37:18,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:37:14" (1/3) ... [2020-10-29 13:37:18,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3edf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:37:18, skipping insertion in model container [2020-10-29 13:37:18,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:37:15" (2/3) ... [2020-10-29 13:37:18,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3edf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:37:18, skipping insertion in model container [2020-10-29 13:37:18,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:37:18" (3/3) ... [2020-10-29 13:37:18,061 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-29 13:37:18,074 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:37:18,080 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:37:18,095 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:37:18,127 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:37:18,128 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:37:18,128 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:37:18,128 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:37:18,128 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:37:18,128 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:37:18,128 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:37:18,129 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:37:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states. [2020-10-29 13:37:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:37:18,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:18,178 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] [2020-10-29 13:37:18,178 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1279329481, now seen corresponding path program 1 times [2020-10-29 13:37:18,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:18,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046936541] [2020-10-29 13:37:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:18,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:18,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:19,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:22,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:23,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:23,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:23,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:37:23,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:37:23,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-29 13:37:23,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:23,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:23,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:37:23,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:23,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:37:23,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:37:24,856 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:37:24,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:24,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:24,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:24,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:24,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:24,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-29 13:37:24,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:24,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:24,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:24,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:24,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:24,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:24,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046936541] [2020-10-29 13:37:24,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:24,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:37:24,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612097932] [2020-10-29 13:37:25,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:37:25,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:25,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:37:25,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:37:25,026 INFO L87 Difference]: Start difference. First operand 451 states. Second operand 7 states. [2020-10-29 13:37:25,960 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-29 13:37:30,321 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 13:37:31,803 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 13:37:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:32,009 INFO L93 Difference]: Finished difference Result 838 states and 1447 transitions. [2020-10-29 13:37:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:37:32,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-29 13:37:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:32,044 INFO L225 Difference]: With dead ends: 838 [2020-10-29 13:37:32,044 INFO L226 Difference]: Without dead ends: 668 [2020-10-29 13:37:32,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:37:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2020-10-29 13:37:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 445. [2020-10-29 13:37:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-10-29 13:37:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 574 transitions. [2020-10-29 13:37:32,150 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 574 transitions. Word has length 55 [2020-10-29 13:37:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:32,151 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 574 transitions. [2020-10-29 13:37:32,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:37:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 574 transitions. [2020-10-29 13:37:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:37:32,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:32,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:32,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:37:32,160 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash 142088305, now seen corresponding path program 1 times [2020-10-29 13:37:32,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:32,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485474841] [2020-10-29 13:37:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:32,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:32,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:32,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:32,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:33,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:34,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:35,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:37,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:37,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:37:37,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:37:37,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 13:37:37,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:37,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:37,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:37:37,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:37,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:37:37,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:38,125 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:37:38,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:38,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:38,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:38,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:38,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:38,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-29 13:37:38,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:38,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:38,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:38,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485474841] [2020-10-29 13:37:38,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:38,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:37:38,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250117368] [2020-10-29 13:37:38,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:37:38,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:38,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:37:38,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:37:38,249 INFO L87 Difference]: Start difference. First operand 445 states and 574 transitions. Second operand 8 states. [2020-10-29 13:37:39,056 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 13:37:42,400 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 13:37:43,943 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:37:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:44,137 INFO L93 Difference]: Finished difference Result 912 states and 1267 transitions. [2020-10-29 13:37:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:37:44,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-29 13:37:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:44,144 INFO L225 Difference]: With dead ends: 912 [2020-10-29 13:37:44,145 INFO L226 Difference]: Without dead ends: 806 [2020-10-29 13:37:44,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:37:44,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-10-29 13:37:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 460. [2020-10-29 13:37:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-29 13:37:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 591 transitions. [2020-10-29 13:37:44,220 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 591 transitions. Word has length 55 [2020-10-29 13:37:44,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:44,221 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 591 transitions. [2020-10-29 13:37:44,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:37:44,221 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 591 transitions. [2020-10-29 13:37:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:37:44,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:44,227 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] [2020-10-29 13:37:44,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:37:44,227 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash -882442737, now seen corresponding path program 1 times [2020-10-29 13:37:44,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:44,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276572605] [2020-10-29 13:37:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:44,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:44,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:44,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:44,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:45,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:45,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:48,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:49,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:49,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:37:49,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:37:49,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:37:49,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:49,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:37:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:37:49,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:37:49,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:50,151 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:37:50,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:50,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:50,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:50,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:50,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:37:50,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:50,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:50,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:50,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:50,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:50,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:50,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276572605] [2020-10-29 13:37:50,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:50,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:37:50,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676221742] [2020-10-29 13:37:50,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:37:50,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:50,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:37:50,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:37:50,219 INFO L87 Difference]: Start difference. First operand 460 states and 591 transitions. Second operand 8 states. [2020-10-29 13:37:51,038 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 13:37:53,956 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:37:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:54,988 INFO L93 Difference]: Finished difference Result 858 states and 1169 transitions. [2020-10-29 13:37:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:37:54,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-29 13:37:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:54,997 INFO L225 Difference]: With dead ends: 858 [2020-10-29 13:37:54,998 INFO L226 Difference]: Without dead ends: 627 [2020-10-29 13:37:54,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:37:55,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-10-29 13:37:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 435. [2020-10-29 13:37:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-29 13:37:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 564 transitions. [2020-10-29 13:37:55,039 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 564 transitions. Word has length 56 [2020-10-29 13:37:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:55,044 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 564 transitions. [2020-10-29 13:37:55,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:37:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 564 transitions. [2020-10-29 13:37:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:37:55,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:55,046 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] [2020-10-29 13:37:55,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:37:55,046 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash -488898418, now seen corresponding path program 1 times [2020-10-29 13:37:55,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:55,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221251237] [2020-10-29 13:37:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:55,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:55,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:56,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:56,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:56,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:00,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:00,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:38:00,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:38:00,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:38:00,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:00,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:00,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:38:00,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:00,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:38:00,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:01,104 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:38:01,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:01,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:01,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:01,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:01,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:01,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 13:38:01,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:01,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:01,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:01,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:01,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:01,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:01,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221251237] [2020-10-29 13:38:01,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:01,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:38:01,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974806777] [2020-10-29 13:38:01,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:38:01,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:38:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:38:01,216 INFO L87 Difference]: Start difference. First operand 435 states and 564 transitions. Second operand 8 states. [2020-10-29 13:38:01,992 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 13:38:04,569 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 13:38:06,134 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:38:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:06,534 INFO L93 Difference]: Finished difference Result 1090 states and 1524 transitions. [2020-10-29 13:38:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:38:06,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-29 13:38:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:06,540 INFO L225 Difference]: With dead ends: 1090 [2020-10-29 13:38:06,540 INFO L226 Difference]: Without dead ends: 931 [2020-10-29 13:38:06,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:38:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-10-29 13:38:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 455. [2020-10-29 13:38:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-29 13:38:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 587 transitions. [2020-10-29 13:38:06,581 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 587 transitions. Word has length 57 [2020-10-29 13:38:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:06,581 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 587 transitions. [2020-10-29 13:38:06,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:38:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 587 transitions. [2020-10-29 13:38:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:38:06,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:06,583 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] [2020-10-29 13:38:06,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:38:06,583 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1752658208, now seen corresponding path program 1 times [2020-10-29 13:38:06,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:06,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333594782] [2020-10-29 13:38:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:06,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:06,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:08,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:11,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:11,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:38:11,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:11,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:38:11,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:11,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:11,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:38:11,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:38:11,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:38:11,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:12,580 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:38:12,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:12,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:12,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:12,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:12,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:12,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-29 13:38:12,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:12,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:12,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:12,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333594782] [2020-10-29 13:38:12,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:12,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:38:12,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519401483] [2020-10-29 13:38:12,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:38:12,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:38:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:38:12,658 INFO L87 Difference]: Start difference. First operand 455 states and 587 transitions. Second operand 9 states. [2020-10-29 13:38:13,485 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-29 13:38:16,500 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-29 13:38:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:16,873 INFO L93 Difference]: Finished difference Result 1090 states and 1507 transitions. [2020-10-29 13:38:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:38:16,873 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-29 13:38:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:16,879 INFO L225 Difference]: With dead ends: 1090 [2020-10-29 13:38:16,880 INFO L226 Difference]: Without dead ends: 825 [2020-10-29 13:38:16,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:38:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-10-29 13:38:16,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 553. [2020-10-29 13:38:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-29 13:38:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 742 transitions. [2020-10-29 13:38:16,936 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 742 transitions. Word has length 58 [2020-10-29 13:38:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:16,937 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 742 transitions. [2020-10-29 13:38:16,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:38:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 742 transitions. [2020-10-29 13:38:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:38:16,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:16,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:16,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:38:16,939 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash -440068165, now seen corresponding path program 1 times [2020-10-29 13:38:16,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:16,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986525523] [2020-10-29 13:38:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:16,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:20,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:20,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:38:20,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:38:20,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3395 [2020-10-29 13:38:20,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:20,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:38:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:38:20,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:21,111 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:38:21,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:21,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:21,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:21,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:21,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:21,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:38:21,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:21,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:21,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:21,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:21,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:21,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:21,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986525523] [2020-10-29 13:38:21,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:21,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:38:21,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218589517] [2020-10-29 13:38:21,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:21,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:21,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:21,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:21,156 INFO L87 Difference]: Start difference. First operand 553 states and 742 transitions. Second operand 6 states. [2020-10-29 13:38:21,978 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 13:38:24,271 WARN L193 SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-29 13:38:25,052 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2020-10-29 13:38:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:25,191 INFO L93 Difference]: Finished difference Result 1481 states and 2126 transitions. [2020-10-29 13:38:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:38:25,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:38:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:25,200 INFO L225 Difference]: With dead ends: 1481 [2020-10-29 13:38:25,200 INFO L226 Difference]: Without dead ends: 1266 [2020-10-29 13:38:25,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:38:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2020-10-29 13:38:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 812. [2020-10-29 13:38:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-10-29 13:38:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1122 transitions. [2020-10-29 13:38:25,295 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1122 transitions. Word has length 71 [2020-10-29 13:38:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:25,295 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1122 transitions. [2020-10-29 13:38:25,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1122 transitions. [2020-10-29 13:38:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:38:25,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:25,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:25,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:38:25,298 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:25,299 INFO L82 PathProgramCache]: Analyzing trace with hash 451397214, now seen corresponding path program 1 times [2020-10-29 13:38:25,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:25,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463245427] [2020-10-29 13:38:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:25,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:25,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:25,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:26,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:26,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:38:26,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:38:26,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-29 13:38:26,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:26,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:26,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:26,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:26,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:38:26,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:27,657 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:38:27,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:27,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:27,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:27,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:27,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:27,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:38:27,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:27,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:27,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:27,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:27,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463245427] [2020-10-29 13:38:27,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:27,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:38:27,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229592378] [2020-10-29 13:38:27,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:27,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:27,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:27,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:27,718 INFO L87 Difference]: Start difference. First operand 812 states and 1122 transitions. Second operand 6 states. [2020-10-29 13:38:28,502 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:38:30,585 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 13:38:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:30,722 INFO L93 Difference]: Finished difference Result 1633 states and 2325 transitions. [2020-10-29 13:38:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:38:30,723 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:38:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:30,728 INFO L225 Difference]: With dead ends: 1633 [2020-10-29 13:38:30,728 INFO L226 Difference]: Without dead ends: 988 [2020-10-29 13:38:30,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:38:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2020-10-29 13:38:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 985. [2020-10-29 13:38:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-10-29 13:38:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1382 transitions. [2020-10-29 13:38:30,844 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1382 transitions. Word has length 72 [2020-10-29 13:38:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:30,844 INFO L481 AbstractCegarLoop]: Abstraction has 985 states and 1382 transitions. [2020-10-29 13:38:30,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1382 transitions. [2020-10-29 13:38:30,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:38:30,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:30,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:30,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:38:30,847 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:30,847 INFO L82 PathProgramCache]: Analyzing trace with hash -889839103, now seen corresponding path program 1 times [2020-10-29 13:38:30,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:30,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931357621] [2020-10-29 13:38:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:30,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:30,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:30,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:31,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:31,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:33,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:33,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:38:33,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:33,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2467 [2020-10-29 13:38:33,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:33,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:38:33,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:38:33,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:34,130 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:38:34,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:34,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:34,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:34,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:34,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:34,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:38:34,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:34,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:34,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:34,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931357621] [2020-10-29 13:38:34,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:34,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:38:34,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292951741] [2020-10-29 13:38:34,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:34,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:34,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:34,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:34,180 INFO L87 Difference]: Start difference. First operand 985 states and 1382 transitions. Second operand 6 states. [2020-10-29 13:38:36,549 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 13:38:37,359 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 13:38:38,126 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:38:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:38,361 INFO L93 Difference]: Finished difference Result 2860 states and 4138 transitions. [2020-10-29 13:38:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:38:38,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:38:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:38,371 INFO L225 Difference]: With dead ends: 2860 [2020-10-29 13:38:38,371 INFO L226 Difference]: Without dead ends: 2054 [2020-10-29 13:38:38,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:38:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2020-10-29 13:38:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 2048. [2020-10-29 13:38:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2048 states. [2020-10-29 13:38:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 2916 transitions. [2020-10-29 13:38:38,640 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 2916 transitions. Word has length 72 [2020-10-29 13:38:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:38,640 INFO L481 AbstractCegarLoop]: Abstraction has 2048 states and 2916 transitions. [2020-10-29 13:38:38,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 2916 transitions. [2020-10-29 13:38:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:38:38,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:38,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:38,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:38:38,644 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash -100399914, now seen corresponding path program 1 times [2020-10-29 13:38:38,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:38,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786096213] [2020-10-29 13:38:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:38,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:38,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:38,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:38,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:39,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:42,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:42,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:38:42,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:42,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3353 [2020-10-29 13:38:42,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:42,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:42,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:42,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:38:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 13:38:42,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:42,782 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:38:42,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:42,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:42,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:42,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:42,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:42,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:38:42,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:42,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:42,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:42,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:42,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:42,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:42,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786096213] [2020-10-29 13:38:42,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:42,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:38:42,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835285728] [2020-10-29 13:38:42,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:42,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:42,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:42,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:42,850 INFO L87 Difference]: Start difference. First operand 2048 states and 2916 transitions. Second operand 6 states. [2020-10-29 13:38:45,662 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:38:46,420 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 13:38:47,272 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 13:38:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:47,606 INFO L93 Difference]: Finished difference Result 4031 states and 5719 transitions. [2020-10-29 13:38:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:38:47,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:38:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:47,617 INFO L225 Difference]: With dead ends: 4031 [2020-10-29 13:38:47,617 INFO L226 Difference]: Without dead ends: 3289 [2020-10-29 13:38:47,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:38:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2020-10-29 13:38:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 2903. [2020-10-29 13:38:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2903 states. [2020-10-29 13:38:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 4064 transitions. [2020-10-29 13:38:48,007 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 4064 transitions. Word has length 72 [2020-10-29 13:38:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:48,007 INFO L481 AbstractCegarLoop]: Abstraction has 2903 states and 4064 transitions. [2020-10-29 13:38:48,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 4064 transitions. [2020-10-29 13:38:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:38:48,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:48,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:48,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:38:48,013 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1392396442, now seen corresponding path program 1 times [2020-10-29 13:38:48,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:48,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014507767] [2020-10-29 13:38:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:48,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:48,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:48,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:49,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:49,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:38:49,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:38:49,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-29 13:38:49,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:49,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:49,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:49,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:49,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:38:49,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:50,446 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:38:50,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:50,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:50,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:50,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:50,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:38:50,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:50,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:50,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:50,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:50,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014507767] [2020-10-29 13:38:50,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:50,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:38:50,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595195603] [2020-10-29 13:38:50,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:50,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:50,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:50,513 INFO L87 Difference]: Start difference. First operand 2903 states and 4064 transitions. Second operand 6 states. [2020-10-29 13:38:51,337 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:38:53,510 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 13:38:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:53,838 INFO L93 Difference]: Finished difference Result 6295 states and 8958 transitions. [2020-10-29 13:38:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:38:53,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:38:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:53,857 INFO L225 Difference]: With dead ends: 6295 [2020-10-29 13:38:53,857 INFO L226 Difference]: Without dead ends: 3905 [2020-10-29 13:38:53,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:38:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2020-10-29 13:38:54,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3902. [2020-10-29 13:38:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3902 states. [2020-10-29 13:38:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 5511 transitions. [2020-10-29 13:38:54,570 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 5511 transitions. Word has length 72 [2020-10-29 13:38:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:54,570 INFO L481 AbstractCegarLoop]: Abstraction has 3902 states and 5511 transitions. [2020-10-29 13:38:54,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 5511 transitions. [2020-10-29 13:38:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:38:54,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:54,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:54,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:38:54,577 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:54,577 INFO L82 PathProgramCache]: Analyzing trace with hash -818495016, now seen corresponding path program 1 times [2020-10-29 13:38:54,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:54,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494131878] [2020-10-29 13:38:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:54,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:54,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:54,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:54,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:56,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:59,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4710 [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:38:59,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:00,143 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:39:00,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:00,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:00,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:00,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494131878] [2020-10-29 13:39:00,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:00,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:39:00,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123563541] [2020-10-29 13:39:00,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:39:00,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:39:00,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:39:00,199 INFO L87 Difference]: Start difference. First operand 3902 states and 5511 transitions. Second operand 7 states. [2020-10-29 13:39:01,082 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-29 13:39:03,989 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 13:39:04,811 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-29 13:39:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:05,523 INFO L93 Difference]: Finished difference Result 8098 states and 11449 transitions. [2020-10-29 13:39:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:39:05,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-29 13:39:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:05,549 INFO L225 Difference]: With dead ends: 8098 [2020-10-29 13:39:05,549 INFO L226 Difference]: Without dead ends: 6787 [2020-10-29 13:39:05,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:39:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2020-10-29 13:39:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 3902. [2020-10-29 13:39:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3902 states. [2020-10-29 13:39:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3902 states to 3902 states and 5507 transitions. [2020-10-29 13:39:06,219 INFO L78 Accepts]: Start accepts. Automaton has 3902 states and 5507 transitions. Word has length 73 [2020-10-29 13:39:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:06,219 INFO L481 AbstractCegarLoop]: Abstraction has 3902 states and 5507 transitions. [2020-10-29 13:39:06,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:39:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states and 5507 transitions. [2020-10-29 13:39:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:39:06,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:06,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:06,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:39:06,226 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:06,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1557756405, now seen corresponding path program 1 times [2020-10-29 13:39:06,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:06,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576443409] [2020-10-29 13:39:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:06,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:06,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:06,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:06,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:09,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:09,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:39:09,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:39:09,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2921 [2020-10-29 13:39:09,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:09,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:39:09,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:10,028 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:39:10,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:10,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:10,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:10,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:10,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:10,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:39:10,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:10,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:10,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:10,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:10,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:10,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576443409] [2020-10-29 13:39:10,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:10,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:39:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168918863] [2020-10-29 13:39:10,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:10,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:10,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:10,081 INFO L87 Difference]: Start difference. First operand 3902 states and 5507 transitions. Second operand 8 states. [2020-10-29 13:39:10,933 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-29 13:39:14,169 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 13:39:15,018 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-29 13:39:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:15,735 INFO L93 Difference]: Finished difference Result 9761 states and 13894 transitions. [2020-10-29 13:39:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:39:15,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-29 13:39:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:15,774 INFO L225 Difference]: With dead ends: 9761 [2020-10-29 13:39:15,774 INFO L226 Difference]: Without dead ends: 7140 [2020-10-29 13:39:15,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:39:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2020-10-29 13:39:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3723. [2020-10-29 13:39:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2020-10-29 13:39:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5227 transitions. [2020-10-29 13:39:16,236 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5227 transitions. Word has length 73 [2020-10-29 13:39:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:16,236 INFO L481 AbstractCegarLoop]: Abstraction has 3723 states and 5227 transitions. [2020-10-29 13:39:16,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5227 transitions. [2020-10-29 13:39:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:39:16,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:16,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:16,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:39:16,242 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1998928085, now seen corresponding path program 1 times [2020-10-29 13:39:16,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:16,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622130033] [2020-10-29 13:39:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:16,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:16,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:19,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:19,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:39:19,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:39:19,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3084 [2020-10-29 13:39:19,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:19,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:19,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:39:19,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:19,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:39:19,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:20,212 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:39:20,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:20,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:20,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:20,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:20,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:39:20,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:20,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:20,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:20,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:20,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:20,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:20,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622130033] [2020-10-29 13:39:20,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:20,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:39:20,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638714072] [2020-10-29 13:39:20,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:39:20,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:39:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:39:20,286 INFO L87 Difference]: Start difference. First operand 3723 states and 5227 transitions. Second operand 6 states. [2020-10-29 13:39:21,132 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:39:23,647 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 13:39:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:24,219 INFO L93 Difference]: Finished difference Result 9173 states and 13026 transitions. [2020-10-29 13:39:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:39:24,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:39:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:24,231 INFO L225 Difference]: With dead ends: 9173 [2020-10-29 13:39:24,231 INFO L226 Difference]: Without dead ends: 6849 [2020-10-29 13:39:24,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:39:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2020-10-29 13:39:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 6846. [2020-10-29 13:39:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6846 states. [2020-10-29 13:39:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6846 states to 6846 states and 9696 transitions. [2020-10-29 13:39:25,053 INFO L78 Accepts]: Start accepts. Automaton has 6846 states and 9696 transitions. Word has length 73 [2020-10-29 13:39:25,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:25,053 INFO L481 AbstractCegarLoop]: Abstraction has 6846 states and 9696 transitions. [2020-10-29 13:39:25,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:39:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6846 states and 9696 transitions. [2020-10-29 13:39:25,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 13:39:25,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:25,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:25,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:39:25,062 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1311593322, now seen corresponding path program 1 times [2020-10-29 13:39:25,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:25,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136640334] [2020-10-29 13:39:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:25,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:25,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:25,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:25,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:39:25,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:26,467 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:39:26,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:26,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:26,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:26,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:26,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:39:26,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:26,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:26,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:26,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:26,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:26,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:26,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136640334] [2020-10-29 13:39:26,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:26,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:39:26,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567200057] [2020-10-29 13:39:26,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:39:26,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:26,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:39:26,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:39:26,539 INFO L87 Difference]: Start difference. First operand 6846 states and 9696 transitions. Second operand 4 states. [2020-10-29 13:39:27,355 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-29 13:39:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:30,196 INFO L93 Difference]: Finished difference Result 18156 states and 25804 transitions. [2020-10-29 13:39:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:39:30,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-29 13:39:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:30,229 INFO L225 Difference]: With dead ends: 18156 [2020-10-29 13:39:30,230 INFO L226 Difference]: Without dead ends: 12177 [2020-10-29 13:39:30,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:39:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2020-10-29 13:39:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11310. [2020-10-29 13:39:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11310 states. [2020-10-29 13:39:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 15900 transitions. [2020-10-29 13:39:31,719 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 15900 transitions. Word has length 74 [2020-10-29 13:39:31,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:31,719 INFO L481 AbstractCegarLoop]: Abstraction has 11310 states and 15900 transitions. [2020-10-29 13:39:31,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:39:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 15900 transitions. [2020-10-29 13:39:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:39:31,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:31,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:31,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:39:31,725 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:31,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:31,726 INFO L82 PathProgramCache]: Analyzing trace with hash -602541307, now seen corresponding path program 1 times [2020-10-29 13:39:31,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:31,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262944961] [2020-10-29 13:39:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:31,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:31,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:32,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:32,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:39:32,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:39:32,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-29 13:39:32,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:32,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:32,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-29 13:39:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 13:39:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:32,967 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:39:32,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:32,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:32,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:32,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:32,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:32,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:39:32,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:32,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:32,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:32,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:32,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:33,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262944961] [2020-10-29 13:39:33,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:33,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:39:33,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917092273] [2020-10-29 13:39:33,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:39:33,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:33,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:39:33,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:39:33,008 INFO L87 Difference]: Start difference. First operand 11310 states and 15900 transitions. Second operand 4 states. [2020-10-29 13:39:33,821 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-29 13:39:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:37,513 INFO L93 Difference]: Finished difference Result 31188 states and 43936 transitions. [2020-10-29 13:39:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:39:37,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-29 13:39:37,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:37,568 INFO L225 Difference]: With dead ends: 31188 [2020-10-29 13:39:37,569 INFO L226 Difference]: Without dead ends: 20745 [2020-10-29 13:39:37,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:39:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2020-10-29 13:39:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19254. [2020-10-29 13:39:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19254 states. [2020-10-29 13:39:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19254 states to 19254 states and 26868 transitions. [2020-10-29 13:39:40,571 INFO L78 Accepts]: Start accepts. Automaton has 19254 states and 26868 transitions. Word has length 75 [2020-10-29 13:39:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:40,571 INFO L481 AbstractCegarLoop]: Abstraction has 19254 states and 26868 transitions. [2020-10-29 13:39:40,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:39:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 19254 states and 26868 transitions. [2020-10-29 13:39:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:39:40,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:40,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:40,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:39:40,576 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash -924206240, now seen corresponding path program 1 times [2020-10-29 13:39:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:40,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42827168] [2020-10-29 13:39:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:40,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:40,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:41,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:43,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:43,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:39:43,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:39:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2740 [2020-10-29 13:39:43,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:43,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:43,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:39:43,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:44,298 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:39:44,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:44,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:44,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:44,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:44,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42827168] [2020-10-29 13:39:44,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:44,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:39:44,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200529801] [2020-10-29 13:39:44,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:44,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:44,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:44,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:44,353 INFO L87 Difference]: Start difference. First operand 19254 states and 26868 transitions. Second operand 8 states. [2020-10-29 13:39:45,332 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-29 13:39:48,557 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-29 13:39:49,433 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 13:39:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:53,721 INFO L93 Difference]: Finished difference Result 49431 states and 68639 transitions. [2020-10-29 13:39:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:39:53,721 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-10-29 13:39:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:53,796 INFO L225 Difference]: With dead ends: 49431 [2020-10-29 13:39:53,796 INFO L226 Difference]: Without dead ends: 36502 [2020-10-29 13:39:53,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:39:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36502 states. [2020-10-29 13:39:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36502 to 17726. [2020-10-29 13:39:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17726 states. [2020-10-29 13:39:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17726 states to 17726 states and 24756 transitions. [2020-10-29 13:39:56,306 INFO L78 Accepts]: Start accepts. Automaton has 17726 states and 24756 transitions. Word has length 76 [2020-10-29 13:39:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:56,306 INFO L481 AbstractCegarLoop]: Abstraction has 17726 states and 24756 transitions. [2020-10-29 13:39:56,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 17726 states and 24756 transitions. [2020-10-29 13:39:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:39:56,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:56,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:56,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:39:56,310 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1418602, now seen corresponding path program 1 times [2020-10-29 13:39:56,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:56,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910621358] [2020-10-29 13:39:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:56,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:56,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:56,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:58,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:58,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:39:58,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:39:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2015 [2020-10-29 13:39:58,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:58,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:39:58,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:58,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:39:58,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:59,335 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:39:59,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:59,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:59,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:59,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:59,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:39:59,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:59,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:59,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:59,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:59,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:59,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:59,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910621358] [2020-10-29 13:39:59,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:59,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:39:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041384784] [2020-10-29 13:39:59,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:39:59,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:39:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:39:59,385 INFO L87 Difference]: Start difference. First operand 17726 states and 24756 transitions. Second operand 10 states. [2020-10-29 13:40:00,249 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 13:40:03,287 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-29 13:40:04,160 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2020-10-29 13:40:05,173 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-10-29 13:40:06,125 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 13:40:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:12,736 INFO L93 Difference]: Finished difference Result 61968 states and 86246 transitions. [2020-10-29 13:40:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:40:12,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-10-29 13:40:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:12,829 INFO L225 Difference]: With dead ends: 61968 [2020-10-29 13:40:12,830 INFO L226 Difference]: Without dead ends: 49946 [2020-10-29 13:40:12,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:40:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49946 states. [2020-10-29 13:40:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49946 to 27095. [2020-10-29 13:40:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27095 states. [2020-10-29 13:40:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27095 states to 27095 states and 37812 transitions. [2020-10-29 13:40:16,983 INFO L78 Accepts]: Start accepts. Automaton has 27095 states and 37812 transitions. Word has length 77 [2020-10-29 13:40:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:16,984 INFO L481 AbstractCegarLoop]: Abstraction has 27095 states and 37812 transitions. [2020-10-29 13:40:16,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:40:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 27095 states and 37812 transitions. [2020-10-29 13:40:16,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:40:16,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:16,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:16,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:40:16,987 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:16,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1568838847, now seen corresponding path program 1 times [2020-10-29 13:40:16,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:16,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629367871] [2020-10-29 13:40:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:17,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:17,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:17,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:40:17,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:17,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-29 13:40:17,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:17,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:17,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:17,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-29 13:40:17,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 13:40:17,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:18,439 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:40:18,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:18,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:18,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:18,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:18,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:18,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:40:18,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:18,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:18,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:18,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629367871] [2020-10-29 13:40:18,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:18,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:18,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647860785] [2020-10-29 13:40:18,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:18,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:18,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:18,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:18,486 INFO L87 Difference]: Start difference. First operand 27095 states and 37812 transitions. Second operand 6 states. [2020-10-29 13:40:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:28,196 INFO L93 Difference]: Finished difference Result 58134 states and 79701 transitions. [2020-10-29 13:40:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:40:28,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-29 13:40:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:28,263 INFO L225 Difference]: With dead ends: 58134 [2020-10-29 13:40:28,263 INFO L226 Difference]: Without dead ends: 58131 [2020-10-29 13:40:28,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58131 states. [2020-10-29 13:40:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58131 to 29567. [2020-10-29 13:40:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29567 states. [2020-10-29 13:40:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29567 states to 29567 states and 40284 transitions. [2020-10-29 13:40:33,176 INFO L78 Accepts]: Start accepts. Automaton has 29567 states and 40284 transitions. Word has length 78 [2020-10-29 13:40:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:33,176 INFO L481 AbstractCegarLoop]: Abstraction has 29567 states and 40284 transitions. [2020-10-29 13:40:33,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 29567 states and 40284 transitions. [2020-10-29 13:40:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:40:33,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:33,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:33,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:40:33,180 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:33,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:33,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2093509263, now seen corresponding path program 1 times [2020-10-29 13:40:33,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:33,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771802109] [2020-10-29 13:40:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:33,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:33,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:33,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:33,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:33,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:33,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:33,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:38,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:38,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:40:38,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:40:38,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:40:38,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:38,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:38,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:40:38,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:38,957 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-29 13:40:38,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:38,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:38,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:38,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:39,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771802109] [2020-10-29 13:40:39,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:39,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:39,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408127555] [2020-10-29 13:40:39,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:39,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:39,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:39,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:39,006 INFO L87 Difference]: Start difference. First operand 29567 states and 40284 transitions. Second operand 6 states. [2020-10-29 13:40:39,789 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 13:40:41,924 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-29 13:40:44,336 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2020-10-29 13:40:45,448 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-29 13:40:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:52,893 INFO L93 Difference]: Finished difference Result 75766 states and 104530 transitions. [2020-10-29 13:40:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:40:52,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-29 13:40:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:52,977 INFO L225 Difference]: With dead ends: 75766 [2020-10-29 13:40:52,977 INFO L226 Difference]: Without dead ends: 61341 [2020-10-29 13:40:53,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:40:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61341 states.