/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 04:51:53,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 04:51:53,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 04:51:53,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 04:51:53,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 04:51:53,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 04:51:53,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 04:51:53,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 04:51:53,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 04:51:53,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 04:51:53,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 04:51:53,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 04:51:53,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 04:51:53,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 04:51:53,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 04:51:53,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 04:51:53,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 04:51:53,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 04:51:53,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 04:51:53,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 04:51:53,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 04:51:53,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 04:51:53,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 04:51:53,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 04:51:53,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 04:51:53,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 04:51:53,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 04:51:53,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 04:51:53,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 04:51:53,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 04:51:53,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 04:51:53,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 04:51:53,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 04:51:53,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 04:51:53,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 04:51:53,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 04:51:53,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 04:51:53,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 04:51:53,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 04:51:53,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 04:51:53,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 04:51:53,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 04:51:53,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 04:51:53,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 04:51:53,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 04:51:53,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 04:51:53,685 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 04:51:53,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 04:51:53,685 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 04:51:53,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 04:51:53,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 04:51:53,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 04:51:53,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 04:51:53,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 04:51:53,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 04:51:53,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 04:51:53,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 04:51:53,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 04:51:53,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 04:51:53,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 04:51:53,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 04:51:53,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 04:51:53,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 04:51:53,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:51:53,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 04:51:53,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 04:51:53,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 04:51:53,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 04:51:53,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 04:51:53,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 04:51:53,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 04:51:53,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 04:51:54,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 04:51:54,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 04:51:54,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 04:51:54,191 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 04:51:54,192 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 04:51:54,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 04:51:54,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e77b90ca/eab1d76c616d4b6f87a917e40259a6c1/FLAG816e88f4a [2020-10-27 04:51:55,062 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 04:51:55,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 04:51:55,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e77b90ca/eab1d76c616d4b6f87a917e40259a6c1/FLAG816e88f4a [2020-10-27 04:51:55,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e77b90ca/eab1d76c616d4b6f87a917e40259a6c1 [2020-10-27 04:51:55,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 04:51:55,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 04:51:55,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 04:51:55,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 04:51:55,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 04:51:55,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:55,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707fd674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55, skipping insertion in model container [2020-10-27 04:51:55,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:55,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 04:51:55,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 04:51:55,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:51:55,768 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 04:51:55,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:51:55,920 INFO L208 MainTranslator]: Completed translation [2020-10-27 04:51:55,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55 WrapperNode [2020-10-27 04:51:55,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 04:51:55,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 04:51:55,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 04:51:55,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 04:51:55,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:55,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:55,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:55,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:55,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:55,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:56,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (1/1) ... [2020-10-27 04:51:56,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 04:51:56,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 04:51:56,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 04:51:56,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 04:51:56,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:51:56,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 04:51:56,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 04:51:56,119 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 04:51:56,119 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 04:51:56,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 04:51:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 04:51:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 04:51:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 04:51:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 04:51:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 04:51:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 04:51:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 04:51:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 04:51:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 04:51:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 04:51:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 04:51:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 04:51:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 04:51:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 04:51:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 04:51:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 04:51:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 04:51:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 04:51:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 04:51:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 04:51:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 04:51:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 04:51:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 04:51:57,198 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 04:51:57,198 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 04:51:57,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:51:57 BoogieIcfgContainer [2020-10-27 04:51:57,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 04:51:57,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 04:51:57,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 04:51:57,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 04:51:57,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:51:55" (1/3) ... [2020-10-27 04:51:57,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea01c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:51:57, skipping insertion in model container [2020-10-27 04:51:57,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:51:55" (2/3) ... [2020-10-27 04:51:57,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea01c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:51:57, skipping insertion in model container [2020-10-27 04:51:57,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:51:57" (3/3) ... [2020-10-27 04:51:57,211 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 04:51:57,223 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 04:51:57,229 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 04:51:57,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 04:51:57,276 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 04:51:57,276 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 04:51:57,276 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 04:51:57,276 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 04:51:57,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 04:51:57,276 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 04:51:57,277 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 04:51:57,277 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 04:51:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-10-27 04:51:57,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 04:51:57,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:51:57,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:51:57,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:51:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:51:57,314 INFO L82 PathProgramCache]: Analyzing trace with hash -528114270, now seen corresponding path program 1 times [2020-10-27 04:51:57,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:51:57,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430536159] [2020-10-27 04:51:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:51:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:51:57,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:57,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:58,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:51:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:01,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:01,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 04:52:01,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:52:01,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3498 [2020-10-27 04:52:01,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:01,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:52:01,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 04:52:01,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 04:52:01,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 04:52:01,882 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:01,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:01,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:01,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:01,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:01,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:01,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 04:52:01,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:01,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:01,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:52:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430536159] [2020-10-27 04:52:01,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:01,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:52:01,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821260336] [2020-10-27 04:52:01,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:52:01,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:01,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:52:01,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:52:01,998 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 4 states. [2020-10-27 04:52:02,724 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:52:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:03,580 INFO L93 Difference]: Finished difference Result 310 states and 515 transitions. [2020-10-27 04:52:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:52:03,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-27 04:52:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:03,595 INFO L225 Difference]: With dead ends: 310 [2020-10-27 04:52:03,596 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 04:52:03,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 04:52:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2020-10-27 04:52:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 04:52:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 326 transitions. [2020-10-27 04:52:03,688 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 326 transitions. Word has length 55 [2020-10-27 04:52:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:03,690 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 326 transitions. [2020-10-27 04:52:03,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:52:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 326 transitions. [2020-10-27 04:52:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 04:52:03,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:03,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:03,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 04:52:03,707 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:03,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1559590379, now seen corresponding path program 1 times [2020-10-27 04:52:03,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:03,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939902257] [2020-10-27 04:52:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:04,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:08,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:08,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 04:52:08,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:52:08,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 04:52:08,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:08,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:08,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:08,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 04:52:08,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:09,180 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:09,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:09,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:09,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:09,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:09,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:52:09,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:09,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:09,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:09,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939902257] [2020-10-27 04:52:09,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:09,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:09,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676006156] [2020-10-27 04:52:09,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:09,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:09,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:09,228 INFO L87 Difference]: Start difference. First operand 207 states and 326 transitions. Second operand 5 states. [2020-10-27 04:52:10,476 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:10,578 INFO L93 Difference]: Finished difference Result 589 states and 931 transitions. [2020-10-27 04:52:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:10,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-27 04:52:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:10,583 INFO L225 Difference]: With dead ends: 589 [2020-10-27 04:52:10,583 INFO L226 Difference]: Without dead ends: 393 [2020-10-27 04:52:10,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-27 04:52:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2020-10-27 04:52:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-27 04:52:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 612 transitions. [2020-10-27 04:52:10,662 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 612 transitions. Word has length 57 [2020-10-27 04:52:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:10,663 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 612 transitions. [2020-10-27 04:52:10,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 612 transitions. [2020-10-27 04:52:10,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 04:52:10,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:10,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:10,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 04:52:10,667 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:10,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1295049677, now seen corresponding path program 1 times [2020-10-27 04:52:10,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:10,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258701449] [2020-10-27 04:52:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:10,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:10,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:10,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:11,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:14,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:14,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 04:52:14,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 04:52:14,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3626 [2020-10-27 04:52:14,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:14,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:14,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:14,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 04:52:14,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:14,756 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:14,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:14,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:14,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:14,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:14,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:14,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 04:52:14,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:14,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:14,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:14,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:14,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258701449] [2020-10-27 04:52:14,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:14,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:14,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039189327] [2020-10-27 04:52:14,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:14,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:14,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:14,805 INFO L87 Difference]: Start difference. First operand 390 states and 612 transitions. Second operand 5 states. [2020-10-27 04:52:16,354 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:16,486 INFO L93 Difference]: Finished difference Result 1091 states and 1712 transitions. [2020-10-27 04:52:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:16,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-27 04:52:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:16,497 INFO L225 Difference]: With dead ends: 1091 [2020-10-27 04:52:16,497 INFO L226 Difference]: Without dead ends: 748 [2020-10-27 04:52:16,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2020-10-27 04:52:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 745. [2020-10-27 04:52:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-10-27 04:52:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1164 transitions. [2020-10-27 04:52:16,626 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1164 transitions. Word has length 58 [2020-10-27 04:52:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:16,629 INFO L481 AbstractCegarLoop]: Abstraction has 745 states and 1164 transitions. [2020-10-27 04:52:16,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1164 transitions. [2020-10-27 04:52:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 04:52:16,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:16,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:16,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 04:52:16,639 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash 120861780, now seen corresponding path program 1 times [2020-10-27 04:52:16,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:16,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479739532] [2020-10-27 04:52:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:16,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:17,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:17,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 04:52:17,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:52:17,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-27 04:52:17,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:52:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 04:52:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 04:52:17,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 04:52:18,172 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:18,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:18,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:18,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:18,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:18,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:18,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:52:18,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:18,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:18,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:18,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:18,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:18,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479739532] [2020-10-27 04:52:18,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:18,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:52:18,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35727927] [2020-10-27 04:52:18,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:52:18,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:18,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:52:18,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:52:18,216 INFO L87 Difference]: Start difference. First operand 745 states and 1164 transitions. Second operand 4 states. [2020-10-27 04:52:18,521 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:52:19,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:19,248 INFO L93 Difference]: Finished difference Result 1835 states and 2948 transitions. [2020-10-27 04:52:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:52:19,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-10-27 04:52:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:19,256 INFO L225 Difference]: With dead ends: 1835 [2020-10-27 04:52:19,256 INFO L226 Difference]: Without dead ends: 1264 [2020-10-27 04:52:19,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2020-10-27 04:52:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1253. [2020-10-27 04:52:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1253 states. [2020-10-27 04:52:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1984 transitions. [2020-10-27 04:52:19,366 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1984 transitions. Word has length 59 [2020-10-27 04:52:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:19,366 INFO L481 AbstractCegarLoop]: Abstraction has 1253 states and 1984 transitions. [2020-10-27 04:52:19,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:52:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1984 transitions. [2020-10-27 04:52:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 04:52:19,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:19,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:19,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 04:52:19,370 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:19,371 INFO L82 PathProgramCache]: Analyzing trace with hash 442689729, now seen corresponding path program 1 times [2020-10-27 04:52:19,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:19,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262494320] [2020-10-27 04:52:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:19,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:19,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:19,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:19,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:21,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:21,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 04:52:21,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:52:21,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2530 [2020-10-27 04:52:21,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:21,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:21,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:21,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 04:52:21,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:22,288 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:22,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:22,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:22,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:22,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:22,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:22,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:52:22,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:22,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:22,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:22,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:22,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262494320] [2020-10-27 04:52:22,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:22,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:22,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849897341] [2020-10-27 04:52:22,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:22,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:22,331 INFO L87 Difference]: Start difference. First operand 1253 states and 1984 transitions. Second operand 5 states. [2020-10-27 04:52:23,596 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:23,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:23,846 INFO L93 Difference]: Finished difference Result 3599 states and 5700 transitions. [2020-10-27 04:52:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:23,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-10-27 04:52:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:23,863 INFO L225 Difference]: With dead ends: 3599 [2020-10-27 04:52:23,864 INFO L226 Difference]: Without dead ends: 2396 [2020-10-27 04:52:23,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2020-10-27 04:52:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2393. [2020-10-27 04:52:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2393 states. [2020-10-27 04:52:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 3762 transitions. [2020-10-27 04:52:24,064 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 3762 transitions. Word has length 61 [2020-10-27 04:52:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:24,064 INFO L481 AbstractCegarLoop]: Abstraction has 2393 states and 3762 transitions. [2020-10-27 04:52:24,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 3762 transitions. [2020-10-27 04:52:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 04:52:24,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:24,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:24,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 04:52:24,070 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1882468512, now seen corresponding path program 1 times [2020-10-27 04:52:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:24,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491404457] [2020-10-27 04:52:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:24,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:24,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:24,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:25,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:25,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 04:52:25,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:52:25,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1095 [2020-10-27 04:52:25,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 04:52:25,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:25,580 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:25,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:25,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:25,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:25,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:25,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:25,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 04:52:25,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:25,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:25,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:25,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:25,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:25,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491404457] [2020-10-27 04:52:25,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:25,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:25,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601872781] [2020-10-27 04:52:25,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:25,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:25,627 INFO L87 Difference]: Start difference. First operand 2393 states and 3762 transitions. Second operand 5 states. [2020-10-27 04:52:26,858 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:27,248 INFO L93 Difference]: Finished difference Result 6669 states and 10585 transitions. [2020-10-27 04:52:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:27,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-10-27 04:52:27,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:27,274 INFO L225 Difference]: With dead ends: 6669 [2020-10-27 04:52:27,274 INFO L226 Difference]: Without dead ends: 4586 [2020-10-27 04:52:27,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2020-10-27 04:52:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4583. [2020-10-27 04:52:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4583 states. [2020-10-27 04:52:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 7141 transitions. [2020-10-27 04:52:27,720 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 7141 transitions. Word has length 62 [2020-10-27 04:52:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:27,720 INFO L481 AbstractCegarLoop]: Abstraction has 4583 states and 7141 transitions. [2020-10-27 04:52:27,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 7141 transitions. [2020-10-27 04:52:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 04:52:27,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:27,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:27,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 04:52:27,728 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:27,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1355733547, now seen corresponding path program 1 times [2020-10-27 04:52:27,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:27,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054890425] [2020-10-27 04:52:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:27,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:27,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:28,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:29,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:29,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 04:52:29,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:52:29,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1630 [2020-10-27 04:52:29,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:29,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:29,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:29,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 04:52:29,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:29,740 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:29,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:29,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:29,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:29,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:29,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 04:52:29,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:29,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:29,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:29,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:29,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:29,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054890425] [2020-10-27 04:52:29,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:29,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:29,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331788923] [2020-10-27 04:52:29,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:29,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:29,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:29,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:29,792 INFO L87 Difference]: Start difference. First operand 4583 states and 7141 transitions. Second operand 5 states. [2020-10-27 04:52:31,332 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:31,732 INFO L93 Difference]: Finished difference Result 13138 states and 20458 transitions. [2020-10-27 04:52:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:31,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-27 04:52:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:31,774 INFO L225 Difference]: With dead ends: 13138 [2020-10-27 04:52:31,775 INFO L226 Difference]: Without dead ends: 8727 [2020-10-27 04:52:31,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8727 states. [2020-10-27 04:52:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8727 to 8724. [2020-10-27 04:52:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8724 states. [2020-10-27 04:52:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 13470 transitions. [2020-10-27 04:52:32,704 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 13470 transitions. Word has length 63 [2020-10-27 04:52:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:32,704 INFO L481 AbstractCegarLoop]: Abstraction has 8724 states and 13470 transitions. [2020-10-27 04:52:32,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:32,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 13470 transitions. [2020-10-27 04:52:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 04:52:32,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:32,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:32,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 04:52:32,717 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:32,718 INFO L82 PathProgramCache]: Analyzing trace with hash -40271168, now seen corresponding path program 1 times [2020-10-27 04:52:32,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:32,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259866308] [2020-10-27 04:52:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:32,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:32,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:33,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:33,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 04:52:33,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:52:33,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-27 04:52:33,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 04:52:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 04:52:33,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 04:52:33,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:33,569 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:33,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:33,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:33,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:33,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:33,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:33,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:52:33,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:33,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:33,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:33,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259866308] [2020-10-27 04:52:33,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:33,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 04:52:33,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643892847] [2020-10-27 04:52:33,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 04:52:33,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:33,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 04:52:33,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 04:52:33,622 INFO L87 Difference]: Start difference. First operand 8724 states and 13470 transitions. Second operand 4 states. [2020-10-27 04:52:34,010 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:52:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:36,007 INFO L93 Difference]: Finished difference Result 23386 states and 36834 transitions. [2020-10-27 04:52:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 04:52:36,008 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-27 04:52:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:36,069 INFO L225 Difference]: With dead ends: 23386 [2020-10-27 04:52:36,069 INFO L226 Difference]: Without dead ends: 15671 [2020-10-27 04:52:36,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15671 states. [2020-10-27 04:52:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15671 to 15540. [2020-10-27 04:52:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15540 states. [2020-10-27 04:52:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15540 states to 15540 states and 24126 transitions. [2020-10-27 04:52:37,345 INFO L78 Accepts]: Start accepts. Automaton has 15540 states and 24126 transitions. Word has length 63 [2020-10-27 04:52:37,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:37,345 INFO L481 AbstractCegarLoop]: Abstraction has 15540 states and 24126 transitions. [2020-10-27 04:52:37,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 04:52:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 15540 states and 24126 transitions. [2020-10-27 04:52:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 04:52:37,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:37,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:37,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 04:52:37,360 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:37,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2084954650, now seen corresponding path program 1 times [2020-10-27 04:52:37,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:37,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331474875] [2020-10-27 04:52:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:37,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:37,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:37,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:37,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:38,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:38,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 04:52:38,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 04:52:38,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 973 [2020-10-27 04:52:38,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:52:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:52:38,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 04:52:38,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:38,734 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:38,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:38,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:38,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:38,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:38,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:38,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:52:38,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:38,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:38,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:38,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331474875] [2020-10-27 04:52:38,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:38,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:52:38,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49548568] [2020-10-27 04:52:38,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:52:38,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:38,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:52:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:52:38,783 INFO L87 Difference]: Start difference. First operand 15540 states and 24126 transitions. Second operand 5 states. [2020-10-27 04:52:40,818 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:42,737 INFO L93 Difference]: Finished difference Result 44312 states and 69218 transitions. [2020-10-27 04:52:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:52:42,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 04:52:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:42,819 INFO L225 Difference]: With dead ends: 44312 [2020-10-27 04:52:42,820 INFO L226 Difference]: Without dead ends: 29781 [2020-10-27 04:52:42,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 04:52:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29781 states. [2020-10-27 04:52:45,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29781 to 29778. [2020-10-27 04:52:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29778 states. [2020-10-27 04:52:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29778 states to 29778 states and 45854 transitions. [2020-10-27 04:52:45,530 INFO L78 Accepts]: Start accepts. Automaton has 29778 states and 45854 transitions. Word has length 66 [2020-10-27 04:52:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:52:45,531 INFO L481 AbstractCegarLoop]: Abstraction has 29778 states and 45854 transitions. [2020-10-27 04:52:45,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:52:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 29778 states and 45854 transitions. [2020-10-27 04:52:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 04:52:45,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:52:45,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:52:45,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 04:52:45,554 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:52:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:52:45,554 INFO L82 PathProgramCache]: Analyzing trace with hash -524921763, now seen corresponding path program 1 times [2020-10-27 04:52:45,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:52:45,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219294963] [2020-10-27 04:52:45,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:52:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:45,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:45,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:45,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:45,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 04:52:45,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:52:45,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 04:52:45,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:45,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:52:45,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 04:52:45,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 04:52:45,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:46,402 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:52:46,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:52:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:52:46,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:52:46,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:52:46,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:52:46,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:52:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:52:46,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:52:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:52:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:52:46,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:52:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:52:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:52:46,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219294963] [2020-10-27 04:52:46,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:52:46,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:52:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367117441] [2020-10-27 04:52:46,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:52:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:52:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:52:46,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:52:46,447 INFO L87 Difference]: Start difference. First operand 29778 states and 45854 transitions. Second operand 6 states. [2020-10-27 04:52:46,874 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 04:52:49,494 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 04:52:49,882 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:52:51,699 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 04:52:52,212 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:52:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:52:57,936 INFO L93 Difference]: Finished difference Result 131428 states and 208170 transitions. [2020-10-27 04:52:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 04:52:57,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 04:52:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:52:58,189 INFO L225 Difference]: With dead ends: 131428 [2020-10-27 04:52:58,189 INFO L226 Difference]: Without dead ends: 103521 [2020-10-27 04:52:58,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 04:52:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103521 states. [2020-10-27 04:53:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103521 to 54162. [2020-10-27 04:53:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54162 states. [2020-10-27 04:53:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54162 states to 54162 states and 83934 transitions. [2020-10-27 04:53:04,619 INFO L78 Accepts]: Start accepts. Automaton has 54162 states and 83934 transitions. Word has length 67 [2020-10-27 04:53:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:04,619 INFO L481 AbstractCegarLoop]: Abstraction has 54162 states and 83934 transitions. [2020-10-27 04:53:04,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:53:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 54162 states and 83934 transitions. [2020-10-27 04:53:04,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 04:53:04,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:04,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:04,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 04:53:04,645 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1002938706, now seen corresponding path program 1 times [2020-10-27 04:53:04,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:04,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865177851] [2020-10-27 04:53:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:04,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:04,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:05,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:05,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 04:53:05,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:53:05,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-27 04:53:05,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:05,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:05,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 04:53:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 04:53:05,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:05,358 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:53:05,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:05,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:05,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:05,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:05,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:05,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 04:53:05,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:53:05,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865177851] [2020-10-27 04:53:05,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:05,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:05,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434542579] [2020-10-27 04:53:05,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:05,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:05,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:05,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:05,395 INFO L87 Difference]: Start difference. First operand 54162 states and 83934 transitions. Second operand 5 states. [2020-10-27 04:53:05,746 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:53:08,856 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 04:53:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:17,145 INFO L93 Difference]: Finished difference Result 160219 states and 252452 transitions. [2020-10-27 04:53:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 04:53:17,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 04:53:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:17,429 INFO L225 Difference]: With dead ends: 160219 [2020-10-27 04:53:17,429 INFO L226 Difference]: Without dead ends: 107928 [2020-10-27 04:53:17,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:53:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107928 states. [2020-10-27 04:53:25,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107928 to 80594. [2020-10-27 04:53:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80594 states. [2020-10-27 04:53:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80594 states to 80594 states and 125470 transitions. [2020-10-27 04:53:25,939 INFO L78 Accepts]: Start accepts. Automaton has 80594 states and 125470 transitions. Word has length 68 [2020-10-27 04:53:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:25,939 INFO L481 AbstractCegarLoop]: Abstraction has 80594 states and 125470 transitions. [2020-10-27 04:53:25,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:53:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 80594 states and 125470 transitions. [2020-10-27 04:53:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 04:53:25,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:25,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:25,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 04:53:25,967 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1502222959, now seen corresponding path program 1 times [2020-10-27 04:53:25,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:25,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219620709] [2020-10-27 04:53:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:26,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:26,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:26,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:26,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:26,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 04:53:26,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:53:26,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 888 [2020-10-27 04:53:26,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 04:53:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 04:53:26,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:27,250 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:53:27,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:27,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:27,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:27,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:27,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:27,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:53:27,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:27,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:53:27,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219620709] [2020-10-27 04:53:27,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:27,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:27,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140107201] [2020-10-27 04:53:27,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:27,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:27,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:27,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:27,288 INFO L87 Difference]: Start difference. First operand 80594 states and 125470 transitions. Second operand 5 states. [2020-10-27 04:53:27,682 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:53:30,800 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:53:31,287 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:53:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:53:41,622 INFO L93 Difference]: Finished difference Result 163803 states and 256548 transitions. [2020-10-27 04:53:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:53:41,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 04:53:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:53:42,001 INFO L225 Difference]: With dead ends: 163803 [2020-10-27 04:53:42,002 INFO L226 Difference]: Without dead ends: 118872 [2020-10-27 04:53:42,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:53:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118872 states. [2020-10-27 04:53:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118872 to 118226. [2020-10-27 04:53:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118226 states. [2020-10-27 04:53:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118226 states to 118226 states and 182942 transitions. [2020-10-27 04:53:54,308 INFO L78 Accepts]: Start accepts. Automaton has 118226 states and 182942 transitions. Word has length 68 [2020-10-27 04:53:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:53:54,309 INFO L481 AbstractCegarLoop]: Abstraction has 118226 states and 182942 transitions. [2020-10-27 04:53:54,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:53:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 118226 states and 182942 transitions. [2020-10-27 04:53:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 04:53:54,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:53:54,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:53:54,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 04:53:54,340 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:53:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:53:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2120493342, now seen corresponding path program 1 times [2020-10-27 04:53:54,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:53:54,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367729673] [2020-10-27 04:53:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:53:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:54,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:54,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:55,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:55,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 04:53:55,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:53:55,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-27 04:53:55,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:53:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 04:53:55,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 04:53:55,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:56,125 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:53:56,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:53:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:53:56,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:53:56,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:53:56,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:53:56,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:53:56,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 04:53:56,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:53:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:53:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:53:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:53:56,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:53:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:53:56,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367729673] [2020-10-27 04:53:56,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:53:56,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:53:56,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642035535] [2020-10-27 04:53:56,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:53:56,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:53:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:53:56,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:53:56,163 INFO L87 Difference]: Start difference. First operand 118226 states and 182942 transitions. Second operand 5 states. [2020-10-27 04:53:56,543 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:53:59,065 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:53:59,539 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:54:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:54:16,370 INFO L93 Difference]: Finished difference Result 240859 states and 374564 transitions. [2020-10-27 04:54:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:54:16,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 04:54:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:54:16,713 INFO L225 Difference]: With dead ends: 240859 [2020-10-27 04:54:16,714 INFO L226 Difference]: Without dead ends: 172504 [2020-10-27 04:54:16,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:54:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172504 states. [2020-10-27 04:54:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172504 to 171602. [2020-10-27 04:54:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171602 states. [2020-10-27 04:54:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171602 states to 171602 states and 263838 transitions. [2020-10-27 04:54:35,029 INFO L78 Accepts]: Start accepts. Automaton has 171602 states and 263838 transitions. Word has length 68 [2020-10-27 04:54:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:54:35,029 INFO L481 AbstractCegarLoop]: Abstraction has 171602 states and 263838 transitions. [2020-10-27 04:54:35,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 04:54:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 171602 states and 263838 transitions. [2020-10-27 04:54:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 04:54:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:54:35,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:54:35,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 04:54:35,056 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:54:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:54:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash -686405224, now seen corresponding path program 1 times [2020-10-27 04:54:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:54:35,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700066695] [2020-10-27 04:54:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:54:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:35,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:35,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:36,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:36,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 04:54:36,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 04:54:36,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1241 [2020-10-27 04:54:36,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:36,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 04:54:36,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 04:54:36,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 04:54:36,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:36,671 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 04:54:36,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:54:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:54:36,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:54:36,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:54:36,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:54:36,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:54:36,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 04:54:36,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:54:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:54:36,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:54:36,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:54:36,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:54:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:54:36,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700066695] [2020-10-27 04:54:36,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:54:36,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 04:54:36,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302081050] [2020-10-27 04:54:36,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 04:54:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:54:36,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 04:54:36,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 04:54:36,710 INFO L87 Difference]: Start difference. First operand 171602 states and 263838 transitions. Second operand 5 states. [2020-10-27 04:54:37,073 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 04:54:39,449 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 04:54:39,823 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-27 04:55:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:55:02,734 INFO L93 Difference]: Finished difference Result 347611 states and 538980 transitions. [2020-10-27 04:55:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:55:02,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 04:55:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:55:03,205 INFO L225 Difference]: With dead ends: 347611 [2020-10-27 04:55:03,205 INFO L226 Difference]: Without dead ends: 223576 [2020-10-27 04:55:03,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:55:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223576 states.