/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.5.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:23:35,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:23:35,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:23:35,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:23:35,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:23:35,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:23:35,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:23:35,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:23:35,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:23:35,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:23:35,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:23:35,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:23:35,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:23:35,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:23:35,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:23:35,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:23:35,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:23:35,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:23:35,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:23:35,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:23:35,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:23:35,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:23:35,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:23:35,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:23:35,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:23:35,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:23:35,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:23:35,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:23:35,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:23:35,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:23:35,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:23:35,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:23:35,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:23:35,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:23:35,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:23:35,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:23:35,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:23:35,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:23:35,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:23:35,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:23:35,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:23:35,162 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 13:23:35,192 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:23:35,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:23:35,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:23:35,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:23:35,195 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:23:35,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:23:35,196 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:23:35,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:23:35,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:23:35,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:23:35,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:23:35,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:23:35,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:23:35,198 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:23:35,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:23:35,198 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:23:35,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:23:35,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:23:35,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:23:35,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:23:35,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:23:35,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:23:35,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:23:35,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:23:35,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:23:35,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:23:35,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:23:35,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:23:35,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:23:35,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:23:35,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:23:35,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:23:35,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:23:35,682 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:23:35,685 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:23:35,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-29 13:23:35,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1e79ae9b/ae04165a5a6c4818a5f0ca38e7d2b8c2/FLAGe3bb0a7b1 [2020-10-29 13:23:36,660 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:23:36,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-29 13:23:36,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1e79ae9b/ae04165a5a6c4818a5f0ca38e7d2b8c2/FLAGe3bb0a7b1 [2020-10-29 13:23:36,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1e79ae9b/ae04165a5a6c4818a5f0ca38e7d2b8c2 [2020-10-29 13:23:36,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:23:36,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:23:36,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:23:36,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:23:36,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:23:36,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:23:36" (1/1) ... [2020-10-29 13:23:36,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d97885b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:36, skipping insertion in model container [2020-10-29 13:23:36,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:23:36" (1/1) ... [2020-10-29 13:23:36,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:23:36,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:23:37,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:23:37,904 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:23:38,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:23:38,249 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:23:38,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38 WrapperNode [2020-10-29 13:23:38,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:23:38,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:23:38,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:23:38,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:23:38,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (1/1) ... [2020-10-29 13:23:38,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (1/1) ... [2020-10-29 13:23:38,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (1/1) ... [2020-10-29 13:23:38,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (1/1) ... [2020-10-29 13:23:38,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (1/1) ... [2020-10-29 13:23:38,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (1/1) ... [2020-10-29 13:23:38,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (1/1) ... [2020-10-29 13:23:38,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:23:38,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:23:38,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:23:38,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:23:38,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (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 13:23:38,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:23:38,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:23:38,619 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:23:38,619 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:23:38,620 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:23:38,620 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:23:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:23:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:23:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:23:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:23:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:23:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:23:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:23:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:23:38,623 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:23:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:23:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:23:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:23:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:23:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:23:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:23:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:23:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:23:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:23:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:23:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:23:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:23:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:23:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:23:41,609 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:23:41,610 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:23:41,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:23:41 BoogieIcfgContainer [2020-10-29 13:23:41,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:23:41,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:23:41,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:23:41,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:23:41,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:23:36" (1/3) ... [2020-10-29 13:23:41,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed6990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:23:41, skipping insertion in model container [2020-10-29 13:23:41,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:23:38" (2/3) ... [2020-10-29 13:23:41,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed6990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:23:41, skipping insertion in model container [2020-10-29 13:23:41,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:23:41" (3/3) ... [2020-10-29 13:23:41,622 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-29 13:23:41,636 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:23:41,642 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:23:41,657 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:23:41,691 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:23:41,691 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:23:41,691 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:23:41,691 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:23:41,691 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:23:41,691 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:23:41,692 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:23:41,692 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:23:41,723 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states. [2020-10-29 13:23:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:23:41,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:23:41,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:23:41,744 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:23:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:23:41,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1615027478, now seen corresponding path program 1 times [2020-10-29 13:23:41,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:23:41,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90412109] [2020-10-29 13:23:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:23:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:42,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:42,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:42,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:42,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:43,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:44,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:45,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:45,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:47,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:47,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:23:47,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:23:47,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 13:23:47,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:47,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:23:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:23:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:23:47,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:23:48,343 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:23:48,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:48,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:48,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:23:48,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:23:48,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-29 13:23:48,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:48,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:23:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:23:48,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:23:48,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:23:48,512 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 13:23:48,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90412109] [2020-10-29 13:23:48,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:23:48,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:23:48,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173953367] [2020-10-29 13:23:48,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:23:48,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:23:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:23:48,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:23:48,549 INFO L87 Difference]: Start difference. First operand 638 states. Second operand 6 states. [2020-10-29 13:23:49,640 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:23:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:23:54,415 INFO L93 Difference]: Finished difference Result 974 states and 1721 transitions. [2020-10-29 13:23:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:23:54,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-29 13:23:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:23:54,461 INFO L225 Difference]: With dead ends: 974 [2020-10-29 13:23:54,462 INFO L226 Difference]: Without dead ends: 500 [2020-10-29 13:23:54,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:23:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2020-10-29 13:23:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2020-10-29 13:23:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-29 13:23:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 648 transitions. [2020-10-29 13:23:54,576 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 648 transitions. Word has length 77 [2020-10-29 13:23:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:23:54,577 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 648 transitions. [2020-10-29 13:23:54,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:23:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 648 transitions. [2020-10-29 13:23:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:23:54,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:23:54,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:23:54,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:23:54,590 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:23:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:23:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -478254633, now seen corresponding path program 1 times [2020-10-29 13:23:54,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:23:54,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610116972] [2020-10-29 13:23:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:23:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:54,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:54,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:54,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:55,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:55,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:59,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:59,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:23:59,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:23:59,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:23:59,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:59,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:23:59,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:23:59,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:23:59,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:24:00,849 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:24:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:00,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:00,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:00,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:00,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:00,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-29 13:24:00,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:00,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:00,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:00,987 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 13:24:00,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610116972] [2020-10-29 13:24:00,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:00,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:24:00,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598003120] [2020-10-29 13:24:00,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:00,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:00,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:00,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:00,993 INFO L87 Difference]: Start difference. First operand 500 states and 648 transitions. Second operand 6 states. [2020-10-29 13:24:01,984 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:24:05,480 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:24:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:06,052 INFO L93 Difference]: Finished difference Result 1024 states and 1386 transitions. [2020-10-29 13:24:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:24:06,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-29 13:24:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:06,062 INFO L225 Difference]: With dead ends: 1024 [2020-10-29 13:24:06,063 INFO L226 Difference]: Without dead ends: 636 [2020-10-29 13:24:06,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:24:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2020-10-29 13:24:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 601. [2020-10-29 13:24:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-10-29 13:24:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 822 transitions. [2020-10-29 13:24:06,153 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 822 transitions. Word has length 78 [2020-10-29 13:24:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:06,154 INFO L481 AbstractCegarLoop]: Abstraction has 601 states and 822 transitions. [2020-10-29 13:24:06,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 822 transitions. [2020-10-29 13:24:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:24:06,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:06,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:24:06,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:24:06,160 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1241318284, now seen corresponding path program 1 times [2020-10-29 13:24:06,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:06,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562037372] [2020-10-29 13:24:06,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:06,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:06,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:06,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:07,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:07,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:07,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:07,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:07,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:08,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:11,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:11,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:24:11,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:24:11,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:24:11,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:11,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:24:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:11,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:24:11,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:12,219 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:24:12,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:12,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:12,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:12,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:12,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 13:24:12,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:12,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:12,314 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 13:24:12,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562037372] [2020-10-29 13:24:12,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:12,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:24:12,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132931926] [2020-10-29 13:24:12,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:12,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:12,317 INFO L87 Difference]: Start difference. First operand 601 states and 822 transitions. Second operand 6 states. [2020-10-29 13:24:13,314 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:24:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:15,894 INFO L93 Difference]: Finished difference Result 1090 states and 1525 transitions. [2020-10-29 13:24:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:24:15,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-29 13:24:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:15,902 INFO L225 Difference]: With dead ends: 1090 [2020-10-29 13:24:15,903 INFO L226 Difference]: Without dead ends: 575 [2020-10-29 13:24:15,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:24:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-10-29 13:24:15,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2020-10-29 13:24:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-10-29 13:24:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 790 transitions. [2020-10-29 13:24:15,958 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 790 transitions. Word has length 79 [2020-10-29 13:24:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:15,959 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 790 transitions. [2020-10-29 13:24:15,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 790 transitions. [2020-10-29 13:24:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:24:15,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:15,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:24:15,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:24:15,965 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash 108427573, now seen corresponding path program 1 times [2020-10-29 13:24:15,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:15,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107552979] [2020-10-29 13:24:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:16,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:16,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:17,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:19,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:19,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:20,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:20,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:21,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:21,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:24:21,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:24:21,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:24:21,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:21,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:21,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:24:21,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:24:21,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:24:21,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:22,069 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:24:22,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:22,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:22,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:22,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:22,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 13:24:22,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:22,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:24:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:22,190 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 13:24:22,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107552979] [2020-10-29 13:24:22,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:22,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:24:22,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123770042] [2020-10-29 13:24:22,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:22,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:22,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:22,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:22,193 INFO L87 Difference]: Start difference. First operand 575 states and 790 transitions. Second operand 6 states. [2020-10-29 13:24:23,268 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:24:26,702 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:24:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:27,258 INFO L93 Difference]: Finished difference Result 1291 states and 1787 transitions. [2020-10-29 13:24:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:24:27,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-29 13:24:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:27,264 INFO L225 Difference]: With dead ends: 1291 [2020-10-29 13:24:27,264 INFO L226 Difference]: Without dead ends: 792 [2020-10-29 13:24:27,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:24:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-29 13:24:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 743. [2020-10-29 13:24:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-10-29 13:24:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1024 transitions. [2020-10-29 13:24:27,317 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1024 transitions. Word has length 80 [2020-10-29 13:24:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:27,317 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1024 transitions. [2020-10-29 13:24:27,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1024 transitions. [2020-10-29 13:24:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:24:27,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:27,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:24:27,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:24:27,320 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1699272526, now seen corresponding path program 1 times [2020-10-29 13:24:27,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:27,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360185715] [2020-10-29 13:24:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:27,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:27,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:27,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:27,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:28,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:28,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:28,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:29,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:29,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:29,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:30,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:32,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:32,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:24:32,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:24:32,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:24:32,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:32,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:24:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:24:32,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:24:32,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:33,404 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:24:33,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:33,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:33,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:33,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:33,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:33,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:24:33,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:33,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:33,469 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 13:24:33,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360185715] [2020-10-29 13:24:33,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:33,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:24:33,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294498478] [2020-10-29 13:24:33,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:33,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:33,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:33,471 INFO L87 Difference]: Start difference. First operand 743 states and 1024 transitions. Second operand 6 states. [2020-10-29 13:24:34,431 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-29 13:24:39,132 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-29 13:24:40,588 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-29 13:24:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:42,429 INFO L93 Difference]: Finished difference Result 4013 states and 5755 transitions. [2020-10-29 13:24:42,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:24:42,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-29 13:24:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:42,452 INFO L225 Difference]: With dead ends: 4013 [2020-10-29 13:24:42,452 INFO L226 Difference]: Without dead ends: 3568 [2020-10-29 13:24:42,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:24:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2020-10-29 13:24:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 1993. [2020-10-29 13:24:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1993 states. [2020-10-29 13:24:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2865 transitions. [2020-10-29 13:24:42,613 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2865 transitions. Word has length 81 [2020-10-29 13:24:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:42,614 INFO L481 AbstractCegarLoop]: Abstraction has 1993 states and 2865 transitions. [2020-10-29 13:24:42,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2865 transitions. [2020-10-29 13:24:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:24:42,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:42,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:24:42,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:24:42,618 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:42,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1018856570, now seen corresponding path program 1 times [2020-10-29 13:24:42,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:42,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475890794] [2020-10-29 13:24:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:42,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:42,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:42,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:43,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:43,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:44,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:44,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:44,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:45,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:46,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:47,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:47,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:24:47,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:24:47,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-29 13:24:47,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:47,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:47,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:24:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:24:47,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:24:47,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:48,809 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:24:48,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:48,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:48,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:48,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:48,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:48,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:24:48,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:48,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:48,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:48,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:48,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:48,866 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 13:24:48,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475890794] [2020-10-29 13:24:48,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:48,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:24:48,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012621075] [2020-10-29 13:24:48,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:24:48,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:24:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:24:48,868 INFO L87 Difference]: Start difference. First operand 1993 states and 2865 transitions. Second operand 7 states. [2020-10-29 13:24:49,897 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2020-10-29 13:24:52,837 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:24:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:53,782 INFO L93 Difference]: Finished difference Result 3913 states and 5684 transitions. [2020-10-29 13:24:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:24:53,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-29 13:24:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:53,797 INFO L225 Difference]: With dead ends: 3913 [2020-10-29 13:24:53,797 INFO L226 Difference]: Without dead ends: 2540 [2020-10-29 13:24:53,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:24:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2020-10-29 13:24:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1993. [2020-10-29 13:24:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1993 states. [2020-10-29 13:24:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2863 transitions. [2020-10-29 13:24:53,990 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2863 transitions. Word has length 81 [2020-10-29 13:24:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:53,991 INFO L481 AbstractCegarLoop]: Abstraction has 1993 states and 2863 transitions. [2020-10-29 13:24:53,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:24:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2863 transitions. [2020-10-29 13:24:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:24:53,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:53,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:24:53,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:24:53,995 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:53,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:53,996 INFO L82 PathProgramCache]: Analyzing trace with hash 410664617, now seen corresponding path program 1 times [2020-10-29 13:24:53,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:53,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835572772] [2020-10-29 13:24:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:54,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:54,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:55,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:55,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:58,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:59,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:59,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:24:59,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:24:59,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:24:59,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:59,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:59,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:24:59,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:24:59,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:24:59,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:00,214 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:25:00,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:00,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:00,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:00,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:00,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:00,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:25:00,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:00,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:00,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:00,307 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 13:25:00,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835572772] [2020-10-29 13:25:00,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:00,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:25:00,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796465018] [2020-10-29 13:25:00,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:25:00,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:25:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:25:00,309 INFO L87 Difference]: Start difference. First operand 1993 states and 2863 transitions. Second operand 8 states. [2020-10-29 13:25:01,425 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification that was a NOOP. DAG size: 372 [2020-10-29 13:25:04,621 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2020-10-29 13:25:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:06,299 INFO L93 Difference]: Finished difference Result 5064 states and 7453 transitions. [2020-10-29 13:25:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:25:06,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-29 13:25:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:06,319 INFO L225 Difference]: With dead ends: 5064 [2020-10-29 13:25:06,319 INFO L226 Difference]: Without dead ends: 4046 [2020-10-29 13:25:06,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:25:06,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2020-10-29 13:25:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 1993. [2020-10-29 13:25:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1993 states. [2020-10-29 13:25:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2862 transitions. [2020-10-29 13:25:06,506 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2862 transitions. Word has length 82 [2020-10-29 13:25:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:06,506 INFO L481 AbstractCegarLoop]: Abstraction has 1993 states and 2862 transitions. [2020-10-29 13:25:06,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:25:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2862 transitions. [2020-10-29 13:25:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:25:06,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:06,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:06,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:25:06,510 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:06,511 INFO L82 PathProgramCache]: Analyzing trace with hash 629539030, now seen corresponding path program 1 times [2020-10-29 13:25:06,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:06,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745664966] [2020-10-29 13:25:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:06,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:06,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:07,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:07,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:07,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:08,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:08,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:09,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:09,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:09,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:09,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:10,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:10,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:11,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:11,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:25:11,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:25:11,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:25:11,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:11,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:25:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:25:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 13:25:11,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:12,694 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:25:12,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:12,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:12,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:12,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:12,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:12,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:25:12,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:12,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:12,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:12,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:12,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:25:12,759 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 13:25:12,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745664966] [2020-10-29 13:25:12,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:12,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:25:12,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353234500] [2020-10-29 13:25:12,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:25:12,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:12,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:25:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:25:12,762 INFO L87 Difference]: Start difference. First operand 1993 states and 2862 transitions. Second operand 8 states. [2020-10-29 13:25:13,785 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 13:25:16,890 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:25:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:18,539 INFO L93 Difference]: Finished difference Result 6389 states and 9369 transitions. [2020-10-29 13:25:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:25:18,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-29 13:25:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:18,567 INFO L225 Difference]: With dead ends: 6389 [2020-10-29 13:25:18,567 INFO L226 Difference]: Without dead ends: 5391 [2020-10-29 13:25:18,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:25:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5391 states. [2020-10-29 13:25:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5391 to 1993. [2020-10-29 13:25:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1993 states. [2020-10-29 13:25:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2860 transitions. [2020-10-29 13:25:18,812 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2860 transitions. Word has length 82 [2020-10-29 13:25:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:18,813 INFO L481 AbstractCegarLoop]: Abstraction has 1993 states and 2860 transitions. [2020-10-29 13:25:18,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:25:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2860 transitions. [2020-10-29 13:25:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:25:18,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:18,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:25:18,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:25:18,816 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1237225301, now seen corresponding path program 1 times [2020-10-29 13:25:18,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:18,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660417136] [2020-10-29 13:25:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:18,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:19,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:19,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:19,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:19,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:19,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:22,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:22,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:23,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:23,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:25:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:24,946 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:25:24,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:24,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:24,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:24,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:24,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:24,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:25:24,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:24,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:24,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:24,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:24,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:24,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:25,007 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 13:25:25,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660417136] [2020-10-29 13:25:25,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:25,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:25:25,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789169864] [2020-10-29 13:25:25,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:25:25,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:25:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:25:25,010 INFO L87 Difference]: Start difference. First operand 1993 states and 2860 transitions. Second operand 8 states. [2020-10-29 13:25:26,095 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 13:25:31,182 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:25:32,309 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:25:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:33,734 INFO L93 Difference]: Finished difference Result 3927 states and 5702 transitions. [2020-10-29 13:25:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:25:33,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2020-10-29 13:25:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:33,747 INFO L225 Difference]: With dead ends: 3927 [2020-10-29 13:25:33,747 INFO L226 Difference]: Without dead ends: 2865 [2020-10-29 13:25:33,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:25:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2020-10-29 13:25:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 1993. [2020-10-29 13:25:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1993 states. [2020-10-29 13:25:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2855 transitions. [2020-10-29 13:25:33,970 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2855 transitions. Word has length 82 [2020-10-29 13:25:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:33,970 INFO L481 AbstractCegarLoop]: Abstraction has 1993 states and 2855 transitions. [2020-10-29 13:25:33,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:25:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2855 transitions. [2020-10-29 13:25:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:25:33,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:33,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:33,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:25:33,977 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:33,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2104200679, now seen corresponding path program 1 times [2020-10-29 13:25:33,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:33,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449221314] [2020-10-29 13:25:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:34,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:34,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:34,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:34,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:34,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:36,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:36,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:36,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:37,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:38,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:39,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:39,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:25:39,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:25:39,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:25:39,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:39,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:25:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:25:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:25:39,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:40,059 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:25:40,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:40,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:40,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:40,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:40,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:25:40,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:40,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:40,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:40,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:40,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:40,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:40,129 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 13:25:40,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449221314] [2020-10-29 13:25:40,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:40,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:25:40,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258914494] [2020-10-29 13:25:40,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:25:40,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:40,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:25:40,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:25:40,132 INFO L87 Difference]: Start difference. First operand 1993 states and 2855 transitions. Second operand 8 states. [2020-10-29 13:25:41,206 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 13:25:44,713 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:25:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:46,363 INFO L93 Difference]: Finished difference Result 6471 states and 9483 transitions. [2020-10-29 13:25:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:25:46,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-29 13:25:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:46,385 INFO L225 Difference]: With dead ends: 6471 [2020-10-29 13:25:46,385 INFO L226 Difference]: Without dead ends: 5451 [2020-10-29 13:25:46,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:25:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2020-10-29 13:25:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 1993. [2020-10-29 13:25:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1993 states. [2020-10-29 13:25:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2851 transitions. [2020-10-29 13:25:46,663 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2851 transitions. Word has length 83 [2020-10-29 13:25:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:46,663 INFO L481 AbstractCegarLoop]: Abstraction has 1993 states and 2851 transitions. [2020-10-29 13:25:46,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:25:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2851 transitions. [2020-10-29 13:25:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:25:46,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:46,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:25:46,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:25:46,667 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1005113867, now seen corresponding path program 1 times [2020-10-29 13:25:46,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:46,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970818514] [2020-10-29 13:25:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:46,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:46,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:47,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:48,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:49,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:49,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:49,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:49,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:49,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:51,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:51,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:51,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:51,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:51,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:25:51,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:25:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:25:51,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:51,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:25:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:25:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:25:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:52,719 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:25:52,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:52,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:52,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:52,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:52,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 13:25:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:52,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:25:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:52,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:25:52,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:52,801 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 13:25:52,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970818514] [2020-10-29 13:25:52,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:52,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:25:52,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298139232] [2020-10-29 13:25:52,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:25:52,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:52,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:25:52,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:25:52,803 INFO L87 Difference]: Start difference. First operand 1993 states and 2851 transitions. Second operand 8 states. [2020-10-29 13:25:53,821 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-29 13:25:56,980 WARN L193 SmtUtils]: Spent 949.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-29 13:25:59,088 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-29 13:25:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:25:59,481 INFO L93 Difference]: Finished difference Result 7039 states and 10318 transitions. [2020-10-29 13:25:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:25:59,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-29 13:25:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:25:59,500 INFO L225 Difference]: With dead ends: 7039 [2020-10-29 13:25:59,500 INFO L226 Difference]: Without dead ends: 5672 [2020-10-29 13:25:59,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:25:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2020-10-29 13:25:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 1781. [2020-10-29 13:25:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1781 states. [2020-10-29 13:25:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2537 transitions. [2020-10-29 13:25:59,782 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2537 transitions. Word has length 83 [2020-10-29 13:25:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:25:59,782 INFO L481 AbstractCegarLoop]: Abstraction has 1781 states and 2537 transitions. [2020-10-29 13:25:59,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:25:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2537 transitions. [2020-10-29 13:25:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:25:59,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:25:59,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:25:59,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:25:59,786 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:25:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:25:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1234724156, now seen corresponding path program 1 times [2020-10-29 13:25:59,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:25:59,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283746195] [2020-10-29 13:25:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:25:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:59,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:59,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:00,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:00,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:00,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:01,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:01,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:02,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:02,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:03,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:04,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:04,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:26:04,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:26:04,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:26:04,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:04,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:04,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:26:04,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:26:04,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:26:04,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:05,859 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:26:05,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:05,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:05,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:05,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:05,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:05,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:26:05,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:05,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:05,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:05,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:05,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:05,915 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 13:26:05,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283746195] [2020-10-29 13:26:05,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:05,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:26:05,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048148519] [2020-10-29 13:26:05,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:26:05,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:05,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:26:05,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:26:05,917 INFO L87 Difference]: Start difference. First operand 1781 states and 2537 transitions. Second operand 8 states. [2020-10-29 13:26:06,994 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 13:26:10,587 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:26:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:12,152 INFO L93 Difference]: Finished difference Result 6162 states and 9000 transitions. [2020-10-29 13:26:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:26:12,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-29 13:26:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:12,165 INFO L225 Difference]: With dead ends: 6162 [2020-10-29 13:26:12,166 INFO L226 Difference]: Without dead ends: 5129 [2020-10-29 13:26:12,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:26:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5129 states. [2020-10-29 13:26:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5129 to 1781. [2020-10-29 13:26:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1781 states. [2020-10-29 13:26:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2531 transitions. [2020-10-29 13:26:12,404 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2531 transitions. Word has length 83 [2020-10-29 13:26:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:12,404 INFO L481 AbstractCegarLoop]: Abstraction has 1781 states and 2531 transitions. [2020-10-29 13:26:12,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:26:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2531 transitions. [2020-10-29 13:26:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:26:12,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:12,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:12,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:26:12,407 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:12,407 INFO L82 PathProgramCache]: Analyzing trace with hash -909034845, now seen corresponding path program 1 times [2020-10-29 13:26:12,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:12,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337801770] [2020-10-29 13:26:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:12,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:12,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:12,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:12,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:13,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:17,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 13:26:17,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:18,441 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:26:18,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:18,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:18,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:18,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:18,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:18,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:26:18,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:18,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:18,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:18,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:18,497 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 13:26:18,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337801770] [2020-10-29 13:26:18,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:18,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:26:18,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103690713] [2020-10-29 13:26:18,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:26:18,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:18,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:26:18,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:26:18,499 INFO L87 Difference]: Start difference. First operand 1781 states and 2531 transitions. Second operand 8 states. [2020-10-29 13:26:19,513 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 13:26:22,738 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:26:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:24,698 INFO L93 Difference]: Finished difference Result 6087 states and 8866 transitions. [2020-10-29 13:26:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:26:24,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-29 13:26:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:24,713 INFO L225 Difference]: With dead ends: 6087 [2020-10-29 13:26:24,713 INFO L226 Difference]: Without dead ends: 5085 [2020-10-29 13:26:24,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:26:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2020-10-29 13:26:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 1781. [2020-10-29 13:26:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1781 states. [2020-10-29 13:26:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2525 transitions. [2020-10-29 13:26:25,049 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2525 transitions. Word has length 83 [2020-10-29 13:26:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:25,049 INFO L481 AbstractCegarLoop]: Abstraction has 1781 states and 2525 transitions. [2020-10-29 13:26:25,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:26:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2525 transitions. [2020-10-29 13:26:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:26:25,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:25,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:25,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:26:25,052 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash -342617115, now seen corresponding path program 1 times [2020-10-29 13:26:25,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:25,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966785526] [2020-10-29 13:26:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:25,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:25,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:30,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:30,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:26:30,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:26:30,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:26:30,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:30,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:26:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:26:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:26:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:31,092 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:26:31,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:31,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:31,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:31,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:31,142 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 13:26:31,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966785526] [2020-10-29 13:26:31,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:31,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:26:31,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282740359] [2020-10-29 13:26:31,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:26:31,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:26:31,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:26:31,144 INFO L87 Difference]: Start difference. First operand 1781 states and 2525 transitions. Second operand 8 states. [2020-10-29 13:26:32,151 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 13:26:35,747 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:26:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:37,768 INFO L93 Difference]: Finished difference Result 4258 states and 6158 transitions. [2020-10-29 13:26:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:26:37,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-29 13:26:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:37,777 INFO L225 Difference]: With dead ends: 4258 [2020-10-29 13:26:37,778 INFO L226 Difference]: Without dead ends: 3076 [2020-10-29 13:26:37,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:26:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2020-10-29 13:26:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 1781. [2020-10-29 13:26:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1781 states. [2020-10-29 13:26:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2519 transitions. [2020-10-29 13:26:38,138 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2519 transitions. Word has length 83 [2020-10-29 13:26:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:38,139 INFO L481 AbstractCegarLoop]: Abstraction has 1781 states and 2519 transitions. [2020-10-29 13:26:38,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:26:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2519 transitions. [2020-10-29 13:26:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:26:38,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:38,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:38,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:26:38,142 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:38,142 INFO L82 PathProgramCache]: Analyzing trace with hash 876684309, now seen corresponding path program 1 times [2020-10-29 13:26:38,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:38,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835796645] [2020-10-29 13:26:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:38,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:38,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:38,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:38,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:40,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:43,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:43,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:26:43,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:26:43,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:26:43,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:43,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:43,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:26:43,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:26:43,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:26:43,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:44,327 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:26:44,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:44,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:44,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:44,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:44,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:44,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:26:44,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:44,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:44,426 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 13:26:44,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835796645] [2020-10-29 13:26:44,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:44,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:26:44,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133855205] [2020-10-29 13:26:44,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:26:44,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:26:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:26:44,429 INFO L87 Difference]: Start difference. First operand 1781 states and 2519 transitions. Second operand 8 states. [2020-10-29 13:26:45,448 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification that was a NOOP. DAG size: 371 [2020-10-29 13:26:47,762 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2020-10-29 13:26:48,899 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification that was a NOOP. DAG size: 370 [2020-10-29 13:26:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:26:50,047 INFO L93 Difference]: Finished difference Result 2805 states and 4029 transitions. [2020-10-29 13:26:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:26:50,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-29 13:26:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:26:50,051 INFO L225 Difference]: With dead ends: 2805 [2020-10-29 13:26:50,051 INFO L226 Difference]: Without dead ends: 2116 [2020-10-29 13:26:50,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:26:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2020-10-29 13:26:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1587. [2020-10-29 13:26:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1587 states. [2020-10-29 13:26:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2252 transitions. [2020-10-29 13:26:50,321 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2252 transitions. Word has length 84 [2020-10-29 13:26:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:26:50,321 INFO L481 AbstractCegarLoop]: Abstraction has 1587 states and 2252 transitions. [2020-10-29 13:26:50,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:26:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2252 transitions. [2020-10-29 13:26:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:26:50,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:26:50,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:26:50,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:26:50,324 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:26:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:26:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash -580083156, now seen corresponding path program 1 times [2020-10-29 13:26:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:26:50,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050804981] [2020-10-29 13:26:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:26:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:50,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:50,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:51,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:52,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:53,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:53,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:55,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:55,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:55,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:26:55,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:26:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-29 13:26:55,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:55,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:26:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:26:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 13:26:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:56,435 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:26:56,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:26:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:26:56,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:26:56,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:26:56,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:26:56,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:26:56,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:26:56,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:26:56,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:26:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:26:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:26:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:26:56,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:26:56,491 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 13:26:56,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050804981] [2020-10-29 13:26:56,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:26:56,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:26:56,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801687996] [2020-10-29 13:26:56,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:26:56,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:26:56,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:26:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:26:56,493 INFO L87 Difference]: Start difference. First operand 1587 states and 2252 transitions. Second operand 8 states. [2020-10-29 13:26:57,541 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2020-10-29 13:27:00,085 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-29 13:27:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:27:02,074 INFO L93 Difference]: Finished difference Result 3826 states and 5516 transitions. [2020-10-29 13:27:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:27:02,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-10-29 13:27:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:27:02,081 INFO L225 Difference]: With dead ends: 3826 [2020-10-29 13:27:02,081 INFO L226 Difference]: Without dead ends: 3820 [2020-10-29 13:27:02,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:27:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2020-10-29 13:27:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 1587. [2020-10-29 13:27:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1587 states. [2020-10-29 13:27:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2250 transitions. [2020-10-29 13:27:02,382 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2250 transitions. Word has length 84 [2020-10-29 13:27:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:27:02,383 INFO L481 AbstractCegarLoop]: Abstraction has 1587 states and 2250 transitions. [2020-10-29 13:27:02,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:27:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2250 transitions. [2020-10-29 13:27:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:27:02,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:02,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:02,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:27:02,385 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash 368326671, now seen corresponding path program 1 times [2020-10-29 13:27:02,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:02,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190979214] [2020-10-29 13:27:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:02,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:02,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:03,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:06,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:07,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:27:07,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:08,452 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:27:08,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:27:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:08,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:08,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:27:08,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:27:08,498 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 13:27:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190979214] [2020-10-29 13:27:08,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:27:08,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:27:08,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262475576] [2020-10-29 13:27:08,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:27:08,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:27:08,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:27:08,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:27:08,500 INFO L87 Difference]: Start difference. First operand 1587 states and 2250 transitions. Second operand 8 states. [2020-10-29 13:27:09,526 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 364