/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+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:36:56,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:36:56,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:36:56,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:36:56,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:36:56,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:36:56,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:36:56,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:36:56,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:36:56,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:36:56,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:36:56,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:36:56,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:36:56,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:36:56,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:36:56,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:36:56,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:36:56,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:36:56,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:36:56,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:36:56,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:36:56,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:36:56,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:36:56,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:36:56,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:36:56,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:36:56,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:36:56,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:36:56,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:36:56,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:36:56,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:36:56,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:36:56,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:36:56,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:36:56,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:36:56,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:36:56,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:36:56,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:36:56,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:36:56,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:36:56,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:36:56,574 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 13:36:56,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:36:56,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:36:56,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:36:56,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:36:56,627 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:36:56,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:36:56,627 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:36:56,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:36:56,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:36:56,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:36:56,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:36:56,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:36:56,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:36:56,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:36:56,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:36:56,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:36:56,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:36:56,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:36:56,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:36:56,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:36:56,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:36:56,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:36:56,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:36:56,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:36:56,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:36:56,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:36:56,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:36:56,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:36:56,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:36:56,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:36:57,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:36:57,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:36:57,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:36:57,076 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:36:57,077 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:36:57,078 INFO L432 ainManager$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+cfa-reducer.c [2020-10-29 13:36:57,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78fda3ffb/21b70a3410a8433d814756baca4f3e2e/FLAG28e666866 [2020-10-29 13:36:57,920 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:36:57,922 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+cfa-reducer.c [2020-10-29 13:36:57,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78fda3ffb/21b70a3410a8433d814756baca4f3e2e/FLAG28e666866 [2020-10-29 13:36:58,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78fda3ffb/21b70a3410a8433d814756baca4f3e2e [2020-10-29 13:36:58,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:36:58,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:36:58,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:36:58,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:36:58,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:36:58,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca2628f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58, skipping insertion in model container [2020-10-29 13:36:58,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:36:58,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:36:58,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:36:58,480 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:36:58,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:36:58,687 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:36:58,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58 WrapperNode [2020-10-29 13:36:58,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:36:58,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:36:58,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:36:58,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:36:58,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (1/1) ... [2020-10-29 13:36:58,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:36:58,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:36:58,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:36:58,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:36:58,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (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 13:36:58,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:36:58,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:36:58,921 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:36:58,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:36:58,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:36:58,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:36:58,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:36:58,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:36:58,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:36:58,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:36:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:36:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:36:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:36:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:36:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:36:58,923 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:36:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:36:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:36:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:36:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:36:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:36:58,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:36:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:36:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:36:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:36:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:36:58,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:36:59,708 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:36:59,709 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:36:59,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:36:59 BoogieIcfgContainer [2020-10-29 13:36:59,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:36:59,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:36:59,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:36:59,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:36:59,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:36:58" (1/3) ... [2020-10-29 13:36:59,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3427af13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:36:59, skipping insertion in model container [2020-10-29 13:36:59,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:36:58" (2/3) ... [2020-10-29 13:36:59,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3427af13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:36:59, skipping insertion in model container [2020-10-29 13:36:59,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:36:59" (3/3) ... [2020-10-29 13:36:59,721 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:36:59,733 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:36:59,738 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:36:59,753 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:36:59,783 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:36:59,783 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:36:59,783 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:36:59,783 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:36:59,784 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:36:59,784 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:36:59,784 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:36:59,784 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:36:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-10-29 13:36:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 13:36:59,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:36:59,816 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] [2020-10-29 13:36:59,816 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:36:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:36:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash 787528518, now seen corresponding path program 1 times [2020-10-29 13:36:59,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:36:59,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099443820] [2020-10-29 13:36:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:00,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:01,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:01,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 13:37:01,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:37:01,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1587 [2020-10-29 13:37:01,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:01,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:37:01,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:37:01,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:37:02,013 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:02,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:02,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:02,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:02,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:02,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:02,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:37:02,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:02,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:02,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:02,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:02,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:02,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:02,057 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 13:37:02,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099443820] [2020-10-29 13:37:02,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:02,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:37:02,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660476523] [2020-10-29 13:37:02,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:02,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:02,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:02,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:02,084 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 6 states. [2020-10-29 13:37:02,336 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:37:03,031 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:03,204 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:03,235 INFO L93 Difference]: Finished difference Result 337 states and 529 transitions. [2020-10-29 13:37:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:37:03,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-29 13:37:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:03,256 INFO L225 Difference]: With dead ends: 337 [2020-10-29 13:37:03,256 INFO L226 Difference]: Without dead ends: 256 [2020-10-29 13:37:03,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:37:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-29 13:37:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 137. [2020-10-29 13:37:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 13:37:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 202 transitions. [2020-10-29 13:37:03,334 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 202 transitions. Word has length 42 [2020-10-29 13:37:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:03,335 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 202 transitions. [2020-10-29 13:37:03,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 202 transitions. [2020-10-29 13:37:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:37:03,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:03,338 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] [2020-10-29 13:37:03,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:37:03,338 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1931101655, now seen corresponding path program 1 times [2020-10-29 13:37:03,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:03,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689033045] [2020-10-29 13:37:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:03,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:03,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:03,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:03,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:03,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:37:03,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:37:03,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-29 13:37:03,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:03,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:37:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:37:03,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:37:04,245 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:04,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:04,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:04,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:04,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:04,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:04,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:37:04,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:04,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:04,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:04,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:04,284 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 13:37:04,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689033045] [2020-10-29 13:37:04,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:04,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:37:04,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306265201] [2020-10-29 13:37:04,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:37:04,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:04,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:37:04,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:37:04,289 INFO L87 Difference]: Start difference. First operand 137 states and 202 transitions. Second operand 4 states. [2020-10-29 13:37:04,524 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:05,098 INFO L93 Difference]: Finished difference Result 331 states and 506 transitions. [2020-10-29 13:37:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:37:05,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-29 13:37:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:05,106 INFO L225 Difference]: With dead ends: 331 [2020-10-29 13:37:05,107 INFO L226 Difference]: Without dead ends: 218 [2020-10-29 13:37:05,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:37:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-29 13:37:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-10-29 13:37:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-29 13:37:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 324 transitions. [2020-10-29 13:37:05,181 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 324 transitions. Word has length 43 [2020-10-29 13:37:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:05,184 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 324 transitions. [2020-10-29 13:37:05,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:37:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 324 transitions. [2020-10-29 13:37:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:37:05,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:05,190 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] [2020-10-29 13:37:05,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:37:05,191 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:05,192 INFO L82 PathProgramCache]: Analyzing trace with hash 348306176, now seen corresponding path program 1 times [2020-10-29 13:37:05,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:05,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72453167] [2020-10-29 13:37:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:05,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:05,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:05,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:37:05,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:37:05,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-29 13:37:05,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:05,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:37:05,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:37:05,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:37:05,696 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:05,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:05,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:05,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:05,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:05,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:05,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:37:05,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:05,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:05,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:05,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:05,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:05,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:05,741 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 13:37:05,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72453167] [2020-10-29 13:37:05,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:05,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:37:05,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187595271] [2020-10-29 13:37:05,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:37:05,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:05,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:37:05,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:37:05,746 INFO L87 Difference]: Start difference. First operand 215 states and 324 transitions. Second operand 4 states. [2020-10-29 13:37:05,966 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:06,426 INFO L93 Difference]: Finished difference Result 533 states and 820 transitions. [2020-10-29 13:37:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:37:06,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-29 13:37:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:06,431 INFO L225 Difference]: With dead ends: 533 [2020-10-29 13:37:06,431 INFO L226 Difference]: Without dead ends: 342 [2020-10-29 13:37:06,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:37:06,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-29 13:37:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 339. [2020-10-29 13:37:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-29 13:37:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 514 transitions. [2020-10-29 13:37:06,489 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 514 transitions. Word has length 44 [2020-10-29 13:37:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:06,490 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 514 transitions. [2020-10-29 13:37:06,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:37:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 514 transitions. [2020-10-29 13:37:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:37:06,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:06,493 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] [2020-10-29 13:37:06,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:37:06,494 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:06,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1626745906, now seen corresponding path program 1 times [2020-10-29 13:37:06,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:06,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038571433] [2020-10-29 13:37:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:06,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:06,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:06,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:06,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:37:06,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:37:06,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-29 13:37:06,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:06,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:06,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:06,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:37:06,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:37:06,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:37:07,220 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:07,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:07,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:07,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:07,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:07,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:07,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:37:07,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:07,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:07,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:07,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:07,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:07,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:07,256 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 13:37:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038571433] [2020-10-29 13:37:07,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:07,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:37:07,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752974668] [2020-10-29 13:37:07,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:07,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:07,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:07,261 INFO L87 Difference]: Start difference. First operand 339 states and 514 transitions. Second operand 6 states. [2020-10-29 13:37:07,876 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:37:08,085 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:37:08,279 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:37:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:08,601 INFO L93 Difference]: Finished difference Result 1172 states and 1800 transitions. [2020-10-29 13:37:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:37:08,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-29 13:37:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:08,607 INFO L225 Difference]: With dead ends: 1172 [2020-10-29 13:37:08,607 INFO L226 Difference]: Without dead ends: 857 [2020-10-29 13:37:08,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:37:08,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2020-10-29 13:37:08,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 851. [2020-10-29 13:37:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 851 states. [2020-10-29 13:37:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1298 transitions. [2020-10-29 13:37:08,688 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1298 transitions. Word has length 45 [2020-10-29 13:37:08,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:08,689 INFO L481 AbstractCegarLoop]: Abstraction has 851 states and 1298 transitions. [2020-10-29 13:37:08,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1298 transitions. [2020-10-29 13:37:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:37:08,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:08,691 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] [2020-10-29 13:37:08,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:37:08,692 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:08,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1816405101, now seen corresponding path program 1 times [2020-10-29 13:37:08,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:08,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98205852] [2020-10-29 13:37:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:08,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:08,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:08,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:08,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:37:08,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:37:08,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-29 13:37:08,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:08,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:37:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:37:08,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:09,170 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:09,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:09,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:09,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:09,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:09,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:09,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:37:09,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:09,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:09,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:09,196 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 13:37:09,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98205852] [2020-10-29 13:37:09,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:09,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:37:09,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52315601] [2020-10-29 13:37:09,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:37:09,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:09,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:37:09,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:37:09,199 INFO L87 Difference]: Start difference. First operand 851 states and 1298 transitions. Second operand 4 states. [2020-10-29 13:37:09,393 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:37:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:09,965 INFO L93 Difference]: Finished difference Result 2241 states and 3414 transitions. [2020-10-29 13:37:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:37:09,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-29 13:37:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:09,978 INFO L225 Difference]: With dead ends: 2241 [2020-10-29 13:37:09,979 INFO L226 Difference]: Without dead ends: 1414 [2020-10-29 13:37:09,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:37:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2020-10-29 13:37:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1411. [2020-10-29 13:37:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2020-10-29 13:37:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2114 transitions. [2020-10-29 13:37:10,084 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2114 transitions. Word has length 45 [2020-10-29 13:37:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:10,086 INFO L481 AbstractCegarLoop]: Abstraction has 1411 states and 2114 transitions. [2020-10-29 13:37:10,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:37:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2114 transitions. [2020-10-29 13:37:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:37:10,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:10,091 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] [2020-10-29 13:37:10,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:37:10,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1575913541, now seen corresponding path program 1 times [2020-10-29 13:37:10,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:10,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710432565] [2020-10-29 13:37:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:10,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:10,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:10,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:10,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:37:10,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:37:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-29 13:37:10,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:10,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:37:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:10,695 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:10,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:10,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:10,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:10,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:10,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:10,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:37:10,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:10,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:10,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:10,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:10,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:10,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:10,743 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 13:37:10,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710432565] [2020-10-29 13:37:10,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:10,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:37:10,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513658018] [2020-10-29 13:37:10,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:10,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:10,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:10,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:10,749 INFO L87 Difference]: Start difference. First operand 1411 states and 2114 transitions. Second operand 6 states. [2020-10-29 13:37:10,960 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:37:11,583 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:37:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:11,796 INFO L93 Difference]: Finished difference Result 4185 states and 6294 transitions. [2020-10-29 13:37:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:37:11,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-29 13:37:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:11,812 INFO L225 Difference]: With dead ends: 4185 [2020-10-29 13:37:11,812 INFO L226 Difference]: Without dead ends: 2798 [2020-10-29 13:37:11,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:37:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2020-10-29 13:37:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2795. [2020-10-29 13:37:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2795 states. [2020-10-29 13:37:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 4170 transitions. [2020-10-29 13:37:12,022 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 4170 transitions. Word has length 47 [2020-10-29 13:37:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:12,022 INFO L481 AbstractCegarLoop]: Abstraction has 2795 states and 4170 transitions. [2020-10-29 13:37:12,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:12,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 4170 transitions. [2020-10-29 13:37:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 13:37:12,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:12,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:12,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:37:12,025 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:12,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1590550880, now seen corresponding path program 1 times [2020-10-29 13:37:12,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:12,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871425690] [2020-10-29 13:37:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:12,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:12,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:12,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 13:37:12,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:12,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-29 13:37:12,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:12,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:37:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-29 13:37:12,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:37:12,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:12,461 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:12,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:12,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:12,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:12,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:12,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:12,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:37:12,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:12,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:12,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:12,489 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 13:37:12,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871425690] [2020-10-29 13:37:12,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:12,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:37:12,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209278156] [2020-10-29 13:37:12,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:37:12,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:12,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:37:12,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:37:12,492 INFO L87 Difference]: Start difference. First operand 2795 states and 4170 transitions. Second operand 5 states. [2020-10-29 13:37:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:13,454 INFO L93 Difference]: Finished difference Result 5758 states and 8508 transitions. [2020-10-29 13:37:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:37:13,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-29 13:37:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:13,484 INFO L225 Difference]: With dead ends: 5758 [2020-10-29 13:37:13,485 INFO L226 Difference]: Without dead ends: 5755 [2020-10-29 13:37:13,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2020-10-29 13:37:13,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 2987. [2020-10-29 13:37:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2987 states. [2020-10-29 13:37:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 4362 transitions. [2020-10-29 13:37:13,816 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 4362 transitions. Word has length 47 [2020-10-29 13:37:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:13,816 INFO L481 AbstractCegarLoop]: Abstraction has 2987 states and 4362 transitions. [2020-10-29 13:37:13,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:37:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 4362 transitions. [2020-10-29 13:37:13,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:37:13,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:13,817 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] [2020-10-29 13:37:13,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:37:13,818 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:13,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1934484864, now seen corresponding path program 1 times [2020-10-29 13:37:13,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:13,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354368978] [2020-10-29 13:37:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:13,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:13,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:13,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:37:13,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:13,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 13:37:13,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:13,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:37:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:37:13,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:14,158 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:14,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:14,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:14,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:14,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:14,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:14,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:37:14,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:14,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:14,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:14,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:14,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:14,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:14,201 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 13:37:14,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354368978] [2020-10-29 13:37:14,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:37:14,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:37:14,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677174511] [2020-10-29 13:37:14,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:37:14,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:14,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:37:14,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:37:14,210 INFO L87 Difference]: Start difference. First operand 2987 states and 4362 transitions. Second operand 4 states. [2020-10-29 13:37:14,397 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:15,110 INFO L93 Difference]: Finished difference Result 7131 states and 10410 transitions. [2020-10-29 13:37:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:37:15,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-29 13:37:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:15,135 INFO L225 Difference]: With dead ends: 7131 [2020-10-29 13:37:15,136 INFO L226 Difference]: Without dead ends: 4168 [2020-10-29 13:37:15,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:37:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2020-10-29 13:37:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 4165. [2020-10-29 13:37:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4165 states. [2020-10-29 13:37:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 6030 transitions. [2020-10-29 13:37:15,528 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 6030 transitions. Word has length 48 [2020-10-29 13:37:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:15,529 INFO L481 AbstractCegarLoop]: Abstraction has 4165 states and 6030 transitions. [2020-10-29 13:37:15,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:37:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 6030 transitions. [2020-10-29 13:37:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 13:37:15,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:15,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:15,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:37:15,533 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1827438212, now seen corresponding path program 1 times [2020-10-29 13:37:15,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:15,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135146830] [2020-10-29 13:37:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:15,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:15,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:15,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:17,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:17,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 13:37:17,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:37:17,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2019 [2020-10-29 13:37:17,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:17,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:37:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:37:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:37:17,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:17,850 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:17,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:17,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:17,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:17,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:17,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:17,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:37:17,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:17,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:17,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:17,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:37:17,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135146830] [2020-10-29 13:37:17,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:17,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:37:17,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400715508] [2020-10-29 13:37:17,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:37:17,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:37:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:37:17,893 INFO L87 Difference]: Start difference. First operand 4165 states and 6030 transitions. Second operand 5 states. [2020-10-29 13:37:18,115 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:37:18,669 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:19,270 INFO L93 Difference]: Finished difference Result 9870 states and 14356 transitions. [2020-10-29 13:37:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:37:19,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-29 13:37:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:19,312 INFO L225 Difference]: With dead ends: 9870 [2020-10-29 13:37:19,313 INFO L226 Difference]: Without dead ends: 6907 [2020-10-29 13:37:19,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:37:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6907 states. [2020-10-29 13:37:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6907 to 6901. [2020-10-29 13:37:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6901 states. [2020-10-29 13:37:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6901 states to 6901 states and 9918 transitions. [2020-10-29 13:37:19,956 INFO L78 Accepts]: Start accepts. Automaton has 6901 states and 9918 transitions. Word has length 65 [2020-10-29 13:37:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:19,956 INFO L481 AbstractCegarLoop]: Abstraction has 6901 states and 9918 transitions. [2020-10-29 13:37:19,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:37:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 6901 states and 9918 transitions. [2020-10-29 13:37:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:37:19,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:19,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:19,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:37:19,960 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2015679948, now seen corresponding path program 1 times [2020-10-29 13:37:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:19,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964424619] [2020-10-29 13:37:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:20,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:20,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:21,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:22,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:24,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:24,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:37:24,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:37:24,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:37:24,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:24,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:24,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:24,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:37:24,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:37:24,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:25,193 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:25,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:25,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:25,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:25,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:25,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:25,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:37:25,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:25,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:37:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 13:37:25,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964424619] [2020-10-29 13:37:25,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:25,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:37:25,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145282061] [2020-10-29 13:37:25,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:25,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:25,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:25,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:25,256 INFO L87 Difference]: Start difference. First operand 6901 states and 9918 transitions. Second operand 6 states. [2020-10-29 13:37:25,471 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:37:26,147 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:26,941 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:37:27,123 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:37:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:27,348 INFO L93 Difference]: Finished difference Result 16346 states and 23758 transitions. [2020-10-29 13:37:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:37:27,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:37:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:27,397 INFO L225 Difference]: With dead ends: 16346 [2020-10-29 13:37:27,397 INFO L226 Difference]: Without dead ends: 13159 [2020-10-29 13:37:27,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:37:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13159 states. [2020-10-29 13:37:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13159 to 11377. [2020-10-29 13:37:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11377 states. [2020-10-29 13:37:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11377 states to 11377 states and 16338 transitions. [2020-10-29 13:37:28,433 INFO L78 Accepts]: Start accepts. Automaton has 11377 states and 16338 transitions. Word has length 66 [2020-10-29 13:37:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:28,434 INFO L481 AbstractCegarLoop]: Abstraction has 11377 states and 16338 transitions. [2020-10-29 13:37:28,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 11377 states and 16338 transitions. [2020-10-29 13:37:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:37:28,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:28,437 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:28,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:37:28,438 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:28,438 INFO L82 PathProgramCache]: Analyzing trace with hash 72278475, now seen corresponding path program 1 times [2020-10-29 13:37:28,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:28,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553896074] [2020-10-29 13:37:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:28,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:28,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:28,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:29,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:31,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:37:31,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:37:31,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2695 [2020-10-29 13:37:31,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:31,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:31,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:37:31,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:37:31,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:31,356 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:31,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:31,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:31,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:31,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:31,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:31,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:37:31,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:31,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:31,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:31,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:31,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:31,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 13:37:31,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553896074] [2020-10-29 13:37:31,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:31,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:37:31,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138017871] [2020-10-29 13:37:31,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:31,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:31,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:31,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:31,390 INFO L87 Difference]: Start difference. First operand 11377 states and 16338 transitions. Second operand 6 states. [2020-10-29 13:37:31,589 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:37:32,165 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:32,887 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:37:33,085 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:37:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:33,303 INFO L93 Difference]: Finished difference Result 17238 states and 24712 transitions. [2020-10-29 13:37:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:37:33,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:37:33,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:33,340 INFO L225 Difference]: With dead ends: 17238 [2020-10-29 13:37:33,340 INFO L226 Difference]: Without dead ends: 14819 [2020-10-29 13:37:33,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:37:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14819 states. [2020-10-29 13:37:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14819 to 12629. [2020-10-29 13:37:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12629 states. [2020-10-29 13:37:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 18118 transitions. [2020-10-29 13:37:34,246 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 18118 transitions. Word has length 66 [2020-10-29 13:37:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:34,247 INFO L481 AbstractCegarLoop]: Abstraction has 12629 states and 18118 transitions. [2020-10-29 13:37:34,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 18118 transitions. [2020-10-29 13:37:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:37:34,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:34,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:34,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:37:34,250 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:34,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1718439700, now seen corresponding path program 1 times [2020-10-29 13:37:34,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:34,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300061250] [2020-10-29 13:37:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:34,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:34,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:34,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:34,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:34,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:34,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:37,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:39,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:39,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:37:39,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:37:39,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:37:39,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:39,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:37:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:37:39,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:37:39,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:39,521 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:39,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:39,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:39,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:39,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:39,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:39,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:37:39,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:39,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:37:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:39,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:37:39,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:37:39,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300061250] [2020-10-29 13:37:39,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:39,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:37:39,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158993189] [2020-10-29 13:37:39,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:37:39,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:37:39,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:37:39,570 INFO L87 Difference]: Start difference. First operand 12629 states and 18118 transitions. Second operand 6 states. [2020-10-29 13:37:39,858 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:37:40,573 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:37:41,259 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:37:41,455 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:37:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:41,705 INFO L93 Difference]: Finished difference Result 20732 states and 29740 transitions. [2020-10-29 13:37:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:37:41,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:37:41,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:41,745 INFO L225 Difference]: With dead ends: 20732 [2020-10-29 13:37:41,745 INFO L226 Difference]: Without dead ends: 16529 [2020-10-29 13:37:41,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:37:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16529 states. [2020-10-29 13:37:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16529 to 13837. [2020-10-29 13:37:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13837 states. [2020-10-29 13:37:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13837 states to 13837 states and 19780 transitions. [2020-10-29 13:37:42,680 INFO L78 Accepts]: Start accepts. Automaton has 13837 states and 19780 transitions. Word has length 66 [2020-10-29 13:37:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:42,680 INFO L481 AbstractCegarLoop]: Abstraction has 13837 states and 19780 transitions. [2020-10-29 13:37:42,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:37:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 13837 states and 19780 transitions. [2020-10-29 13:37:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:37:42,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:42,684 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:42,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:37:42,684 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1307515517, now seen corresponding path program 1 times [2020-10-29 13:37:42,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:42,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771042854] [2020-10-29 13:37:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:42,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:42,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:42,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:42,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:42,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:43,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:43,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:43,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:44,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:44,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:47,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:47,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:37:47,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:37:47,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:37:47,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:47,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:37:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:37:47,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:48,034 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:48,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:48,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:48,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:48,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:48,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:37:48,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:48,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:48,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:48,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:48,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:48,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:48,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771042854] [2020-10-29 13:37:48,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:48,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:37:48,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072700936] [2020-10-29 13:37:48,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:37:48,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:48,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:37:48,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:37:48,112 INFO L87 Difference]: Start difference. First operand 13837 states and 19780 transitions. Second operand 8 states. [2020-10-29 13:37:48,307 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:37:49,542 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:37:49,836 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:37:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:37:52,049 INFO L93 Difference]: Finished difference Result 51958 states and 73658 transitions. [2020-10-29 13:37:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:37:52,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:37:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:37:52,145 INFO L225 Difference]: With dead ends: 51958 [2020-10-29 13:37:52,145 INFO L226 Difference]: Without dead ends: 38147 [2020-10-29 13:37:52,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:37:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38147 states. [2020-10-29 13:37:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38147 to 19475. [2020-10-29 13:37:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19475 states. [2020-10-29 13:37:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19475 states to 19475 states and 27234 transitions. [2020-10-29 13:37:54,038 INFO L78 Accepts]: Start accepts. Automaton has 19475 states and 27234 transitions. Word has length 69 [2020-10-29 13:37:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:37:54,038 INFO L481 AbstractCegarLoop]: Abstraction has 19475 states and 27234 transitions. [2020-10-29 13:37:54,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:37:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 19475 states and 27234 transitions. [2020-10-29 13:37:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:37:54,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:37:54,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:37:54,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:37:54,043 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:37:54,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:37:54,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2097015645, now seen corresponding path program 1 times [2020-10-29 13:37:54,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:37:54,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119984089] [2020-10-29 13:37:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:37:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:54,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:54,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:59,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:37:59,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:59,338 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:37:59,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:37:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:37:59,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:37:59,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:37:59,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:37:59,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:37:59,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:37:59,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:37:59,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:37:59,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:37:59,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:37:59,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:37:59,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:37:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:37:59,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119984089] [2020-10-29 13:37:59,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:37:59,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:37:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405075094] [2020-10-29 13:37:59,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:37:59,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:37:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:37:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:37:59,384 INFO L87 Difference]: Start difference. First operand 19475 states and 27234 transitions. Second operand 8 states. [2020-10-29 13:37:59,589 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:38:00,478 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-29 13:38:00,762 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:38:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:02,735 INFO L93 Difference]: Finished difference Result 36897 states and 51410 transitions. [2020-10-29 13:38:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:38:02,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:38:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:02,787 INFO L225 Difference]: With dead ends: 36897 [2020-10-29 13:38:02,787 INFO L226 Difference]: Without dead ends: 28696 [2020-10-29 13:38:02,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:38:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28696 states. [2020-10-29 13:38:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28696 to 20311. [2020-10-29 13:38:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20311 states. [2020-10-29 13:38:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20311 states to 20311 states and 28245 transitions. [2020-10-29 13:38:04,869 INFO L78 Accepts]: Start accepts. Automaton has 20311 states and 28245 transitions. Word has length 69 [2020-10-29 13:38:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:04,870 INFO L481 AbstractCegarLoop]: Abstraction has 20311 states and 28245 transitions. [2020-10-29 13:38:04,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:38:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20311 states and 28245 transitions. [2020-10-29 13:38:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:38:04,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:04,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:04,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:38:04,873 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:04,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1445265556, now seen corresponding path program 1 times [2020-10-29 13:38:04,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:04,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002418401] [2020-10-29 13:38:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:04,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:04,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:05,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:06,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:06,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:07,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:09,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:09,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:38:09,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:38:09,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:38:09,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:09,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:09,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:38:09,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:38:09,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:38:09,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:10,323 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:38:10,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:10,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:10,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:10,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:10,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:10,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:38:10,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:10,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:38:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:38:10,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:38:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002418401] [2020-10-29 13:38:10,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:38:10,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:38:10,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912711968] [2020-10-29 13:38:10,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:38:10,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:38:10,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:38:10,427 INFO L87 Difference]: Start difference. First operand 20311 states and 28245 transitions. Second operand 8 states. [2020-10-29 13:38:10,659 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:38:11,969 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:38:12,279 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:38:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:15,496 INFO L93 Difference]: Finished difference Result 62214 states and 86406 transitions. [2020-10-29 13:38:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:38:15,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-29 13:38:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:15,556 INFO L225 Difference]: With dead ends: 62214 [2020-10-29 13:38:15,556 INFO L226 Difference]: Without dead ends: 41929 [2020-10-29 13:38:15,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:38:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41929 states. [2020-10-29 13:38:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41929 to 24543. [2020-10-29 13:38:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24543 states. [2020-10-29 13:38:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 33476 transitions. [2020-10-29 13:38:18,204 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 33476 transitions. Word has length 69 [2020-10-29 13:38:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:18,204 INFO L481 AbstractCegarLoop]: Abstraction has 24543 states and 33476 transitions. [2020-10-29 13:38:18,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:38:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 33476 transitions. [2020-10-29 13:38:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:38:18,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:18,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:18,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:38:18,209 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash 970033818, now seen corresponding path program 1 times [2020-10-29 13:38:18,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:18,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069842903] [2020-10-29 13:38:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:18,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:18,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:18,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:18,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:18,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:18,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:18,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:19,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:19,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:20,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:21,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:22,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:23,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:23,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:23,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:38:23,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:38:23,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:38:23,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:23,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:38:23,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:38:23,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:38:23,440 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:38:23,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:23,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:23,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:23,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:23,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:23,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:38:23,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:23,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:23,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:23,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069842903] [2020-10-29 13:38:23,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:38:23,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:38:23,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20946818] [2020-10-29 13:38:23,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:23,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:23,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:23,474 INFO L87 Difference]: Start difference. First operand 24543 states and 33476 transitions. Second operand 6 states. [2020-10-29 13:38:23,666 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:38:25,067 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:38:25,740 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-29 13:38:33,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:33,609 INFO L93 Difference]: Finished difference Result 114578 states and 154965 transitions. [2020-10-29 13:38:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:38:33,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:38:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:33,731 INFO L225 Difference]: With dead ends: 114578 [2020-10-29 13:38:33,732 INFO L226 Difference]: Without dead ends: 90061 [2020-10-29 13:38:33,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:38:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90061 states. [2020-10-29 13:38:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90061 to 67822. [2020-10-29 13:38:40,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67822 states. [2020-10-29 13:38:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67822 states to 67822 states and 91617 transitions. [2020-10-29 13:38:41,016 INFO L78 Accepts]: Start accepts. Automaton has 67822 states and 91617 transitions. Word has length 71 [2020-10-29 13:38:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:41,016 INFO L481 AbstractCegarLoop]: Abstraction has 67822 states and 91617 transitions. [2020-10-29 13:38:41,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 67822 states and 91617 transitions. [2020-10-29 13:38:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:38:41,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:41,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:41,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:38:41,025 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:41,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1805975659, now seen corresponding path program 1 times [2020-10-29 13:38:41,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:41,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47859426] [2020-10-29 13:38:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:41,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:41,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:41,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:41,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:45,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:45,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:38:45,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:38:45,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4266 [2020-10-29 13:38:45,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:45,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:45,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:38:45,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:38:45,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:38:45,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:45,579 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-29 13:38:45,799 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:38:45,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:45,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:45,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:45,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:45,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:45,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:38:45,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:45,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:45,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:38:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:38:45,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47859426] [2020-10-29 13:38:45,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:38:45,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:38:45,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209737940] [2020-10-29 13:38:45,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:38:45,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:45,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:38:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:38:45,852 INFO L87 Difference]: Start difference. First operand 67822 states and 91617 transitions. Second operand 10 states. [2020-10-29 13:38:46,058 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:38:48,320 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:38:48,928 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:39:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:02,412 INFO L93 Difference]: Finished difference Result 158810 states and 212650 transitions. [2020-10-29 13:39:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:39:02,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-29 13:39:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:02,776 INFO L225 Difference]: With dead ends: 158810 [2020-10-29 13:39:02,776 INFO L226 Difference]: Without dead ends: 140734 [2020-10-29 13:39:02,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:39:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140734 states. [2020-10-29 13:39:12,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140734 to 87766. [2020-10-29 13:39:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87766 states. [2020-10-29 13:39:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87766 states to 87766 states and 118546 transitions. [2020-10-29 13:39:13,199 INFO L78 Accepts]: Start accepts. Automaton has 87766 states and 118546 transitions. Word has length 71 [2020-10-29 13:39:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:13,200 INFO L481 AbstractCegarLoop]: Abstraction has 87766 states and 118546 transitions. [2020-10-29 13:39:13,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:39:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 87766 states and 118546 transitions. [2020-10-29 13:39:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:39:13,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:13,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:13,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:39:13,210 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:13,210 INFO L82 PathProgramCache]: Analyzing trace with hash -661979183, now seen corresponding path program 1 times [2020-10-29 13:39:13,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:13,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352960390] [2020-10-29 13:39:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:13,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:13,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:13,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:13,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:13,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:14,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:14,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:14,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:14,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:17,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:39:18,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:18,652 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:39:18,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:18,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:18,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:18,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:18,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:18,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:39:18,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:18,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:18,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:18,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:18,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:18,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:39:18,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352960390] [2020-10-29 13:39:18,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:39:18,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:39:18,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955718263] [2020-10-29 13:39:18,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:18,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:18,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:18,706 INFO L87 Difference]: Start difference. First operand 87766 states and 118546 transitions. Second operand 8 states. [2020-10-29 13:39:18,901 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:39:20,847 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:39:21,378 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:39:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:54,373 INFO L93 Difference]: Finished difference Result 374534 states and 500404 transitions. [2020-10-29 13:39:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:39:54,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 13:39:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:54,934 INFO L225 Difference]: With dead ends: 374534 [2020-10-29 13:39:54,934 INFO L226 Difference]: Without dead ends: 286794 [2020-10-29 13:39:55,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:39:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286794 states. [2020-10-29 13:40:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286794 to 92080. [2020-10-29 13:40:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92080 states. [2020-10-29 13:40:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92080 states to 92080 states and 123758 transitions. [2020-10-29 13:40:09,091 INFO L78 Accepts]: Start accepts. Automaton has 92080 states and 123758 transitions. Word has length 72 [2020-10-29 13:40:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:09,091 INFO L481 AbstractCegarLoop]: Abstraction has 92080 states and 123758 transitions. [2020-10-29 13:40:09,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:40:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 92080 states and 123758 transitions. [2020-10-29 13:40:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:40:09,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:09,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:09,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:40:09,100 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash -419572660, now seen corresponding path program 1 times [2020-10-29 13:40:09,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:09,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120945623] [2020-10-29 13:40:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:09,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:09,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:09,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:09,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:09,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:14,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:40:14,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:14,508 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:14,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:14,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:14,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:14,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:14,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:14,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 13:40:14,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:14,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:14,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:14,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:14,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:14,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:14,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120945623] [2020-10-29 13:40:14,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:14,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:40:14,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370602316] [2020-10-29 13:40:14,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:40:14,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:14,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:40:14,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:40:14,664 INFO L87 Difference]: Start difference. First operand 92080 states and 123758 transitions. Second operand 10 states. [2020-10-29 13:40:14,875 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:40:17,520 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:40:22,373 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:40:28,458 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 135