/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:45:42,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:45:42,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:45:42,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:45:42,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:45:42,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:45:42,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:45:42,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:45:42,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:45:42,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:45:42,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:45:42,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:45:42,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:45:42,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:45:42,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:45:42,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:45:42,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:45:42,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:45:42,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:45:42,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:45:42,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:45:42,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:45:42,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:45:42,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:45:42,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:45:42,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:45:42,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:45:42,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:45:42,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:45:42,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:45:42,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:45:42,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:45:42,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:45:42,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:45:42,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:45:42,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:45:42,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:45:42,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:45:42,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:45:42,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:45:42,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:45:42,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:45:42,186 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:45:42,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:45:42,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:45:42,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:45:42,188 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:45:42,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:45:42,189 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:45:42,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:45:42,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:45:42,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:45:42,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:45:42,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:45:42,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:45:42,190 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:45:42,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:45:42,191 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:45:42,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:45:42,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:45:42,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:45:42,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:45:42,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:45:42,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:45:42,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:45:42,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:45:42,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:45:42,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:45:42,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:45:42,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:45:42,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:45:42,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:45:42,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:45:42,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:45:42,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:45:42,643 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:45:42,644 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:45:42,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:45:42,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b710a8f4c/c0aa987a70e24aef92fea3f833b96aa6/FLAGff466af3a [2020-10-29 13:45:43,584 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:45:43,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:45:43,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b710a8f4c/c0aa987a70e24aef92fea3f833b96aa6/FLAGff466af3a [2020-10-29 13:45:43,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b710a8f4c/c0aa987a70e24aef92fea3f833b96aa6 [2020-10-29 13:45:43,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:45:43,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:45:43,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:45:43,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:45:43,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:45:43,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:45:43" (1/1) ... [2020-10-29 13:45:43,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7780af8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:43, skipping insertion in model container [2020-10-29 13:45:43,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:45:43" (1/1) ... [2020-10-29 13:45:43,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:45:43,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:45:44,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:45:44,634 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:45:44,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:45:44,997 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:45:44,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44 WrapperNode [2020-10-29 13:45:44,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:45:45,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:45:45,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:45:45,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:45:45,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (1/1) ... [2020-10-29 13:45:45,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (1/1) ... [2020-10-29 13:45:45,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (1/1) ... [2020-10-29 13:45:45,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (1/1) ... [2020-10-29 13:45:45,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (1/1) ... [2020-10-29 13:45:45,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (1/1) ... [2020-10-29 13:45:45,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (1/1) ... [2020-10-29 13:45:45,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:45:45,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:45:45,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:45:45,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:45:45,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:45:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:45:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:45:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:45:45,328 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:45:45,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:45:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:45:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:45:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:45:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:45:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:45:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:45:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:45:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:45:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:45:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:45:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:45:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:45:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:45:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:45:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:45:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:45:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:45:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:45:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:45:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:45:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:45:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:45:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:45:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:45:48,501 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:45:48,502 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:45:48,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:45:48 BoogieIcfgContainer [2020-10-29 13:45:48,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:45:48,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:45:48,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:45:48,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:45:48,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:45:43" (1/3) ... [2020-10-29 13:45:48,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30319e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:45:48, skipping insertion in model container [2020-10-29 13:45:48,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:45:44" (2/3) ... [2020-10-29 13:45:48,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30319e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:45:48, skipping insertion in model container [2020-10-29 13:45:48,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:45:48" (3/3) ... [2020-10-29 13:45:48,514 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:45:48,526 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:45:48,532 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:45:48,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:45:48,577 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:45:48,577 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:45:48,577 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:45:48,578 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:45:48,578 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:45:48,578 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:45:48,578 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:45:48,578 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:45:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states. [2020-10-29 13:45:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:45:48,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:48,630 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] [2020-10-29 13:45:48,630 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:48,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2073257526, now seen corresponding path program 1 times [2020-10-29 13:45:48,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:48,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547058311] [2020-10-29 13:45:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:49,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:49,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:49,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:50,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:51,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:53,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:54,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:54,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:45:54,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:45:54,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 13:45:54,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:54,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:45:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:45:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:45:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:45:55,234 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:45:55,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:55,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:55,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:55,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:55,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:55,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:45:55,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:55,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:55,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:55,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:55,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:55,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:45:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:55,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547058311] [2020-10-29 13:45:55,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:55,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:45:55,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483636620] [2020-10-29 13:45:55,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:45:55,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:55,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:45:55,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:45:55,370 INFO L87 Difference]: Start difference. First operand 711 states. Second operand 6 states. [2020-10-29 13:45:56,295 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-29 13:46:02,971 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-29 13:46:03,955 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-29 13:46:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:05,854 INFO L93 Difference]: Finished difference Result 2091 states and 3572 transitions. [2020-10-29 13:46:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:46:05,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:46:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:05,920 INFO L225 Difference]: With dead ends: 2091 [2020-10-29 13:46:05,920 INFO L226 Difference]: Without dead ends: 1546 [2020-10-29 13:46:05,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:46:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-10-29 13:46:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1151. [2020-10-29 13:46:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2020-10-29 13:46:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1614 transitions. [2020-10-29 13:46:06,110 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1614 transitions. Word has length 67 [2020-10-29 13:46:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:06,111 INFO L481 AbstractCegarLoop]: Abstraction has 1151 states and 1614 transitions. [2020-10-29 13:46:06,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:46:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1614 transitions. [2020-10-29 13:46:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:46:06,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:06,117 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] [2020-10-29 13:46:06,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:46:06,118 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:06,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1688312785, now seen corresponding path program 1 times [2020-10-29 13:46:06,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:06,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508894289] [2020-10-29 13:46:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:06,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:06,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:06,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:06,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:06,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:08,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:08,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:09,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:09,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:09,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:10,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:10,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:10,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:11,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:11,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:46:11,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:46:11,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 13:46:11,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:11,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:11,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:11,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:11,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:46:11,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:46:12,209 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:46:12,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:12,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:12,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:12,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:12,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:12,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-29 13:46:12,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:12,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:12,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:46:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:12,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508894289] [2020-10-29 13:46:12,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:12,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:12,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239988980] [2020-10-29 13:46:12,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:12,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:12,330 INFO L87 Difference]: Start difference. First operand 1151 states and 1614 transitions. Second operand 8 states. [2020-10-29 13:46:13,214 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-29 13:46:18,084 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-29 13:46:19,724 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-29 13:46:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:19,888 INFO L93 Difference]: Finished difference Result 3020 states and 4525 transitions. [2020-10-29 13:46:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:46:19,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-29 13:46:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:19,905 INFO L225 Difference]: With dead ends: 3020 [2020-10-29 13:46:19,905 INFO L226 Difference]: Without dead ends: 2600 [2020-10-29 13:46:19,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:46:19,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2020-10-29 13:46:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1140. [2020-10-29 13:46:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1140 states. [2020-10-29 13:46:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1590 transitions. [2020-10-29 13:46:20,004 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1590 transitions. Word has length 68 [2020-10-29 13:46:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:20,005 INFO L481 AbstractCegarLoop]: Abstraction has 1140 states and 1590 transitions. [2020-10-29 13:46:20,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:46:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1590 transitions. [2020-10-29 13:46:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:46:20,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:20,008 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] [2020-10-29 13:46:20,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:46:20,009 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:20,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1426160128, now seen corresponding path program 1 times [2020-10-29 13:46:20,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:20,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747291707] [2020-10-29 13:46:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:20,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:20,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:20,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:20,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:20,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:21,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:21,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:23,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:25,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:25,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:46:25,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:46:25,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:46:25,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:25,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:25,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:25,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:25,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:46:25,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:25,988 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:46:25,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:26,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:26,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:26,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:26,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:26,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 13:46:26,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:26,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:26,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:26,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:26,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:26,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747291707] [2020-10-29 13:46:26,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:26,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:26,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600849474] [2020-10-29 13:46:26,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:26,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:26,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:26,129 INFO L87 Difference]: Start difference. First operand 1140 states and 1590 transitions. Second operand 8 states. [2020-10-29 13:46:27,077 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-29 13:46:32,568 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:46:34,538 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:46:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:34,777 INFO L93 Difference]: Finished difference Result 2773 states and 4092 transitions. [2020-10-29 13:46:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:46:34,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-29 13:46:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:34,796 INFO L225 Difference]: With dead ends: 2773 [2020-10-29 13:46:34,796 INFO L226 Difference]: Without dead ends: 2454 [2020-10-29 13:46:34,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2020-10-29 13:46:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 1200. [2020-10-29 13:46:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2020-10-29 13:46:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1674 transitions. [2020-10-29 13:46:34,886 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1674 transitions. Word has length 68 [2020-10-29 13:46:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:34,887 INFO L481 AbstractCegarLoop]: Abstraction has 1200 states and 1674 transitions. [2020-10-29 13:46:34,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:46:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1674 transitions. [2020-10-29 13:46:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:46:34,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:34,890 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] [2020-10-29 13:46:34,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:46:34,891 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:34,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1637171391, now seen corresponding path program 1 times [2020-10-29 13:46:34,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:34,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74598037] [2020-10-29 13:46:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:34,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:35,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:35,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:35,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:36,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:36,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:36,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:37,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:37,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:39,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:39,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:46:39,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:46:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:46:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:39,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:39,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:46:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:40,977 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:46:40,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:41,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:41,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:41,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:41,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:41,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-29 13:46:41,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:41,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:41,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:41,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:41,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:41,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:41,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74598037] [2020-10-29 13:46:41,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:41,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:41,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089388279] [2020-10-29 13:46:41,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:41,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:41,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:41,086 INFO L87 Difference]: Start difference. First operand 1200 states and 1674 transitions. Second operand 8 states. [2020-10-29 13:46:41,953 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2020-10-29 13:46:46,705 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-29 13:46:48,693 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-29 13:46:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:48,929 INFO L93 Difference]: Finished difference Result 2997 states and 4405 transitions. [2020-10-29 13:46:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:46:48,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-29 13:46:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:48,943 INFO L225 Difference]: With dead ends: 2997 [2020-10-29 13:46:48,944 INFO L226 Difference]: Without dead ends: 2634 [2020-10-29 13:46:48,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:46:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2020-10-29 13:46:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 1188. [2020-10-29 13:46:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1188 states. [2020-10-29 13:46:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1650 transitions. [2020-10-29 13:46:49,033 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1650 transitions. Word has length 68 [2020-10-29 13:46:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:49,033 INFO L481 AbstractCegarLoop]: Abstraction has 1188 states and 1650 transitions. [2020-10-29 13:46:49,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:46:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1650 transitions. [2020-10-29 13:46:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:46:49,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:49,036 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] [2020-10-29 13:46:49,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:46:49,037 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:49,037 INFO L82 PathProgramCache]: Analyzing trace with hash -217175284, now seen corresponding path program 1 times [2020-10-29 13:46:49,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:49,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689998893] [2020-10-29 13:46:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:49,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:49,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:49,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:49,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:49,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:51,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:51,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:51,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:51,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:52,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:54,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:54,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 13:46:54,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:46:54,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:46:54,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:54,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:46:54,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:55,108 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:46:55,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:55,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:55,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:55,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:55,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:55,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-29 13:46:55,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:55,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:55,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689998893] [2020-10-29 13:46:55,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:55,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:46:55,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994270579] [2020-10-29 13:46:55,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:55,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:55,241 INFO L87 Difference]: Start difference. First operand 1188 states and 1650 transitions. Second operand 8 states. [2020-10-29 13:46:56,093 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2020-10-29 13:47:00,879 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:47:02,398 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-29 13:47:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:02,544 INFO L93 Difference]: Finished difference Result 2989 states and 4319 transitions. [2020-10-29 13:47:02,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:47:02,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-29 13:47:02,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:02,556 INFO L225 Difference]: With dead ends: 2989 [2020-10-29 13:47:02,556 INFO L226 Difference]: Without dead ends: 2307 [2020-10-29 13:47:02,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:47:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2020-10-29 13:47:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1212. [2020-10-29 13:47:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2020-10-29 13:47:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1666 transitions. [2020-10-29 13:47:02,659 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1666 transitions. Word has length 68 [2020-10-29 13:47:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:02,659 INFO L481 AbstractCegarLoop]: Abstraction has 1212 states and 1666 transitions. [2020-10-29 13:47:02,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1666 transitions. [2020-10-29 13:47:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:47:02,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:02,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:02,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:47:02,663 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash 617291813, now seen corresponding path program 1 times [2020-10-29 13:47:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:02,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107339150] [2020-10-29 13:47:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:02,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:02,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:02,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:03,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:03,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:07,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 13:47:07,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:08,561 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:47:08,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:08,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:08,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:08,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:08,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:08,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:47:08,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:08,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:47:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:08,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:47:08,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:08,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107339150] [2020-10-29 13:47:08,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:08,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:47:08,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952129539] [2020-10-29 13:47:08,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:47:08,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:08,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:47:08,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:47:08,639 INFO L87 Difference]: Start difference. First operand 1212 states and 1666 transitions. Second operand 6 states. [2020-10-29 13:47:09,514 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-29 13:47:14,384 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-29 13:47:15,339 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-29 13:47:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:16,781 INFO L93 Difference]: Finished difference Result 1762 states and 2472 transitions. [2020-10-29 13:47:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:47:16,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:47:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:16,789 INFO L225 Difference]: With dead ends: 1762 [2020-10-29 13:47:16,789 INFO L226 Difference]: Without dead ends: 1591 [2020-10-29 13:47:16,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:47:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2020-10-29 13:47:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1175. [2020-10-29 13:47:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-10-29 13:47:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1616 transitions. [2020-10-29 13:47:16,879 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1616 transitions. Word has length 69 [2020-10-29 13:47:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:16,879 INFO L481 AbstractCegarLoop]: Abstraction has 1175 states and 1616 transitions. [2020-10-29 13:47:16,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:47:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1616 transitions. [2020-10-29 13:47:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:47:16,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:16,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:16,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:47:16,883 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1459385938, now seen corresponding path program 1 times [2020-10-29 13:47:16,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:16,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887237769] [2020-10-29 13:47:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:16,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:16,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:17,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:17,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:17,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:21,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:21,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:47:21,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:47:21,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:47:21,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:21,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:21,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:47:21,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:47:21,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:47:21,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:47:22,868 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:47:22,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:22,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:22,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:22,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:22,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:22,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:47:22,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:22,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:47:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:47:22,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:22,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887237769] [2020-10-29 13:47:22,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:22,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:47:22,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501122527] [2020-10-29 13:47:22,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:47:22,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:22,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:47:22,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:47:22,946 INFO L87 Difference]: Start difference. First operand 1175 states and 1616 transitions. Second operand 8 states. [2020-10-29 13:47:23,821 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-29 13:47:28,903 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-29 13:47:30,795 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-29 13:47:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:31,084 INFO L93 Difference]: Finished difference Result 2803 states and 4012 transitions. [2020-10-29 13:47:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:47:31,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:47:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:31,097 INFO L225 Difference]: With dead ends: 2803 [2020-10-29 13:47:31,097 INFO L226 Difference]: Without dead ends: 2500 [2020-10-29 13:47:31,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:47:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2020-10-29 13:47:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 1217. [2020-10-29 13:47:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2020-10-29 13:47:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1680 transitions. [2020-10-29 13:47:31,223 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1680 transitions. Word has length 70 [2020-10-29 13:47:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:31,224 INFO L481 AbstractCegarLoop]: Abstraction has 1217 states and 1680 transitions. [2020-10-29 13:47:31,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1680 transitions. [2020-10-29 13:47:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:47:31,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:31,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:31,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:47:31,235 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:31,236 INFO L82 PathProgramCache]: Analyzing trace with hash -489902818, now seen corresponding path program 1 times [2020-10-29 13:47:31,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:31,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608253469] [2020-10-29 13:47:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:31,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:32,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:32,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:36,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:36,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:47:36,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:47:36,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:47:36,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:36,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:36,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:47:36,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:47:36,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:47:36,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:37,250 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:47:37,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:37,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:37,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:37,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:37,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:37,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:47:37,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:37,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:37,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:47:37,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:37,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:47:37,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:47:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:37,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608253469] [2020-10-29 13:47:37,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:37,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:47:37,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345423842] [2020-10-29 13:47:37,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:47:37,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:37,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:47:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:47:37,326 INFO L87 Difference]: Start difference. First operand 1217 states and 1680 transitions. Second operand 8 states. [2020-10-29 13:47:38,214 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-29 13:47:43,415 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:47:45,114 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:47:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:45,403 INFO L93 Difference]: Finished difference Result 3539 states and 5100 transitions. [2020-10-29 13:47:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:47:45,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:47:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:45,416 INFO L225 Difference]: With dead ends: 3539 [2020-10-29 13:47:45,417 INFO L226 Difference]: Without dead ends: 3047 [2020-10-29 13:47:45,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:47:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2020-10-29 13:47:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 1277. [2020-10-29 13:47:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1277 states. [2020-10-29 13:47:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1752 transitions. [2020-10-29 13:47:45,556 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1752 transitions. Word has length 70 [2020-10-29 13:47:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:45,556 INFO L481 AbstractCegarLoop]: Abstraction has 1277 states and 1752 transitions. [2020-10-29 13:47:45,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1752 transitions. [2020-10-29 13:47:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:47:45,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:45,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:45,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:47:45,560 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:45,561 INFO L82 PathProgramCache]: Analyzing trace with hash -687043979, now seen corresponding path program 1 times [2020-10-29 13:47:45,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:45,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135559314] [2020-10-29 13:47:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:45,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:45,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:45,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:45,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:46,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:47,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:47,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:47,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:47,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:47,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:48,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:50,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:50,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:47:50,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:47:50,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:47:50,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:50,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:50,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:47:50,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:47:50,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:47:50,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:51,502 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:47:51,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:51,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:51,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:51,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:51,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:51,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:47:51,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:51,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:47:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:47:51,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:51,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135559314] [2020-10-29 13:47:51,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:51,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:47:51,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923638643] [2020-10-29 13:47:51,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:47:51,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:51,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:47:51,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:47:51,586 INFO L87 Difference]: Start difference. First operand 1277 states and 1752 transitions. Second operand 8 states. [2020-10-29 13:47:53,336 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 345 DAG size of output: 341 [2020-10-29 13:47:59,449 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 346 DAG size of output: 339 [2020-10-29 13:48:00,413 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-29 13:48:03,352 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 345 DAG size of output: 338 [2020-10-29 13:48:04,255 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-29 13:48:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:48:04,895 INFO L93 Difference]: Finished difference Result 4522 states and 6459 transitions. [2020-10-29 13:48:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 13:48:04,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:48:04,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:48:04,913 INFO L225 Difference]: With dead ends: 4522 [2020-10-29 13:48:04,913 INFO L226 Difference]: Without dead ends: 4197 [2020-10-29 13:48:04,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-10-29 13:48:04,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4197 states. [2020-10-29 13:48:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4197 to 1253. [2020-10-29 13:48:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1253 states. [2020-10-29 13:48:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1714 transitions. [2020-10-29 13:48:05,070 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1714 transitions. Word has length 70 [2020-10-29 13:48:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:48:05,071 INFO L481 AbstractCegarLoop]: Abstraction has 1253 states and 1714 transitions. [2020-10-29 13:48:05,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:48:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1714 transitions. [2020-10-29 13:48:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:48:05,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:48:05,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:48:05,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:48:05,075 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:48:05,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:48:05,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1968015400, now seen corresponding path program 1 times [2020-10-29 13:48:05,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:48:05,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004573736] [2020-10-29 13:48:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:48:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:05,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:05,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:05,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:05,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:05,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:05,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:07,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:07,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:07,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:07,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:07,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:10,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:10,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:48:10,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:48:10,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:48:10,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:10,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:48:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:48:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:48:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:11,018 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:48:11,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:48:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:11,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:11,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:11,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:48:11,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:48:11,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:48:11,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:11,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:48:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:48:11,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:48:11,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:48:11,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004573736] [2020-10-29 13:48:11,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:48:11,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:48:11,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671386850] [2020-10-29 13:48:11,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:48:11,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:48:11,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:48:11,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:48:11,083 INFO L87 Difference]: Start difference. First operand 1253 states and 1714 transitions. Second operand 6 states. [2020-10-29 13:48:12,000 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-29 13:48:16,724 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-29 13:48:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:48:17,202 INFO L93 Difference]: Finished difference Result 2493 states and 3440 transitions. [2020-10-29 13:48:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:48:17,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-29 13:48:17,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:48:17,209 INFO L225 Difference]: With dead ends: 2493 [2020-10-29 13:48:17,209 INFO L226 Difference]: Without dead ends: 1614 [2020-10-29 13:48:17,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:48:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2020-10-29 13:48:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1610. [2020-10-29 13:48:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2020-10-29 13:48:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2167 transitions. [2020-10-29 13:48:17,420 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2167 transitions. Word has length 70 [2020-10-29 13:48:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:48:17,420 INFO L481 AbstractCegarLoop]: Abstraction has 1610 states and 2167 transitions. [2020-10-29 13:48:17,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:48:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2167 transitions. [2020-10-29 13:48:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:48:17,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:48:17,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:48:17,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:48:17,424 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:48:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:48:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1735527050, now seen corresponding path program 1 times [2020-10-29 13:48:17,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:48:17,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544341858] [2020-10-29 13:48:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:48:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:17,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:18,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:21,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4473 [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:48:21,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:22,979 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:48:22,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:48:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:22,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:23,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:23,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:48:23,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:48:23,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:48:23,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:23,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:48:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:48:23,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:48:23,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:48:23,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544341858] [2020-10-29 13:48:23,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:48:23,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:48:23,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799046232] [2020-10-29 13:48:23,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:48:23,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:48:23,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:48:23,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:48:23,057 INFO L87 Difference]: Start difference. First operand 1610 states and 2167 transitions. Second operand 9 states. [2020-10-29 13:48:23,989 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2020-10-29 13:48:29,176 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-29 13:48:30,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:48:30,691 INFO L93 Difference]: Finished difference Result 4114 states and 5756 transitions. [2020-10-29 13:48:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:48:30,691 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-29 13:48:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:48:30,705 INFO L225 Difference]: With dead ends: 4114 [2020-10-29 13:48:30,705 INFO L226 Difference]: Without dead ends: 2952 [2020-10-29 13:48:30,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:48:30,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2020-10-29 13:48:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 1917. [2020-10-29 13:48:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-10-29 13:48:31,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2639 transitions. [2020-10-29 13:48:31,044 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2639 transitions. Word has length 71 [2020-10-29 13:48:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:48:31,045 INFO L481 AbstractCegarLoop]: Abstraction has 1917 states and 2639 transitions. [2020-10-29 13:48:31,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:48:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2639 transitions. [2020-10-29 13:48:31,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:48:31,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:48:31,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:48:31,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:48:31,052 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:48:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:48:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash 365886242, now seen corresponding path program 1 times [2020-10-29 13:48:31,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:48:31,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925886429] [2020-10-29 13:48:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:48:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:31,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:31,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:31,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:31,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:31,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:32,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:32,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:32,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:33,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:36,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:36,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:48:36,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:48:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:48:36,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:36,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:36,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:48:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:48:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:48:36,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:36,992 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:48:36,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:48:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:37,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:37,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:48:37,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:48:37,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:48:37,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:37,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:37,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:48:37,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:48:37,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:48:37,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:48:37,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925886429] [2020-10-29 13:48:37,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:48:37,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:48:37,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943861865] [2020-10-29 13:48:37,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:48:37,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:48:37,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:48:37,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:48:37,034 INFO L87 Difference]: Start difference. First operand 1917 states and 2639 transitions. Second operand 8 states. [2020-10-29 13:48:37,888 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2020-10-29 13:48:41,982 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2020-10-29 13:48:42,903 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2020-10-29 13:48:45,201 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-29 13:48:46,172 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2020-10-29 13:48:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:48:47,023 INFO L93 Difference]: Finished difference Result 9281 states and 13459 transitions. [2020-10-29 13:48:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 13:48:47,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:48:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:48:47,052 INFO L225 Difference]: With dead ends: 9281 [2020-10-29 13:48:47,052 INFO L226 Difference]: Without dead ends: 8244 [2020-10-29 13:48:47,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2020-10-29 13:48:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8244 states. [2020-10-29 13:48:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8244 to 1874. [2020-10-29 13:48:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1874 states. [2020-10-29 13:48:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2576 transitions. [2020-10-29 13:48:47,365 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2576 transitions. Word has length 71 [2020-10-29 13:48:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:48:47,366 INFO L481 AbstractCegarLoop]: Abstraction has 1874 states and 2576 transitions. [2020-10-29 13:48:47,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:48:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2576 transitions. [2020-10-29 13:48:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:48:47,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:48:47,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:48:47,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:48:47,370 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:48:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:48:47,370 INFO L82 PathProgramCache]: Analyzing trace with hash 576897505, now seen corresponding path program 1 times [2020-10-29 13:48:47,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:48:47,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779155990] [2020-10-29 13:48:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:48:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:47,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:47,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:48,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:48,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:48,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:48,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:48,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:48,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:49,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:50,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:50,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:52,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:52,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:52,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:48:52,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:48:52,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:48:52,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:52,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:52,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:48:52,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:48:52,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 13:48:52,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:53,339 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:48:53,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:48:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:53,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:53,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:48:53,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:48:53,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:48:53,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:53,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:48:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:48:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:48:53,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:48:53,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779155990] [2020-10-29 13:48:53,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:48:53,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:48:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341461458] [2020-10-29 13:48:53,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:48:53,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:48:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:48:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:48:53,407 INFO L87 Difference]: Start difference. First operand 1874 states and 2576 transitions. Second operand 8 states. [2020-10-29 13:48:54,271 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-29 13:48:58,422 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:49:00,434 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:49:01,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:01,113 INFO L93 Difference]: Finished difference Result 6182 states and 8836 transitions. [2020-10-29 13:49:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:49:01,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:49:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:01,121 INFO L225 Difference]: With dead ends: 6182 [2020-10-29 13:49:01,122 INFO L226 Difference]: Without dead ends: 5251 [2020-10-29 13:49:01,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:49:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2020-10-29 13:49:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 1962. [2020-10-29 13:49:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1962 states. [2020-10-29 13:49:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2695 transitions. [2020-10-29 13:49:01,456 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2695 transitions. Word has length 71 [2020-10-29 13:49:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:01,457 INFO L481 AbstractCegarLoop]: Abstraction has 1962 states and 2695 transitions. [2020-10-29 13:49:01,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:49:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2695 transitions. [2020-10-29 13:49:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:49:01,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:01,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:49:01,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:49:01,460 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1288643403, now seen corresponding path program 1 times [2020-10-29 13:49:01,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:01,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742496732] [2020-10-29 13:49:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:01,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:01,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:01,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:01,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:01,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:04,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:04,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:06,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:06,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:49:06,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:49:06,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:49:06,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:06,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:49:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:49:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:49:06,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:07,490 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:49:07,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:07,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:07,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:07,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:07,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:49:07,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:07,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:49:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:07,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:49:07,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:49:07,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742496732] [2020-10-29 13:49:07,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:07,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:49:07,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745346366] [2020-10-29 13:49:07,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:49:07,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:07,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:49:07,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:49:07,551 INFO L87 Difference]: Start difference. First operand 1962 states and 2695 transitions. Second operand 8 states. [2020-10-29 13:49:08,448 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2020-10-29 13:49:12,698 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-29 13:49:15,058 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-29 13:49:15,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:15,844 INFO L93 Difference]: Finished difference Result 7929 states and 11446 transitions. [2020-10-29 13:49:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:49:15,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:49:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:15,859 INFO L225 Difference]: With dead ends: 7929 [2020-10-29 13:49:15,859 INFO L226 Difference]: Without dead ends: 6803 [2020-10-29 13:49:15,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:49:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6803 states. [2020-10-29 13:49:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6803 to 1974. [2020-10-29 13:49:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1974 states. [2020-10-29 13:49:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2707 transitions. [2020-10-29 13:49:16,257 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2707 transitions. Word has length 71 [2020-10-29 13:49:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:16,258 INFO L481 AbstractCegarLoop]: Abstraction has 1974 states and 2707 transitions. [2020-10-29 13:49:16,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:49:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2707 transitions. [2020-10-29 13:49:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:49:16,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:16,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:49:16,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:49:16,261 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:16,262 INFO L82 PathProgramCache]: Analyzing trace with hash -467814037, now seen corresponding path program 1 times [2020-10-29 13:49:16,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:16,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889486573] [2020-10-29 13:49:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:16,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:16,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:16,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:18,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:18,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:21,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:21,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:49:21,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:49:21,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:49:21,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:21,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:21,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:49:21,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:49:21,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:49:21,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:22,222 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2020-10-29 13:49:22,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:22,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:22,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:22,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:22,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:22,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:49:22,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:22,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:49:22,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889486573] [2020-10-29 13:49:22,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:22,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:49:22,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282981784] [2020-10-29 13:49:22,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:49:22,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:22,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:49:22,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:49:22,276 INFO L87 Difference]: Start difference. First operand 1974 states and 2707 transitions. Second operand 9 states. [2020-10-29 13:49:23,182 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 338