/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_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:06:19,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:06:19,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:06:19,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:06:19,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:06:19,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:06:19,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:06:19,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:06:19,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:06:19,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:06:19,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:06:19,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:06:19,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:06:19,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:06:19,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:06:19,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:06:19,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:06:19,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:06:19,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:06:19,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:06:19,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:06:19,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:06:19,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:06:19,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:06:19,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:06:19,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:06:19,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:06:19,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:06:19,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:06:19,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:06:19,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:06:19,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:06:19,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:06:19,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:06:19,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:06:19,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:06:19,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:06:19,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:06:19,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:06:19,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:06:19,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:06:19,414 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 14:06:19,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:06:19,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:06:19,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:06:19,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:06:19,445 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:06:19,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:06:19,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:06:19,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:06:19,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:06:19,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:06:19,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:06:19,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:06:19,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:06:19,447 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:06:19,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:06:19,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:06:19,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:06:19,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:06:19,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:06:19,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:06:19,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:06:19,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:06:19,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:06:19,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:06:19,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:06:19,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:06:19,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:06:19,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:06:19,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:06:19,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:06:19,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:06:19,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:06:19,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:06:19,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:06:19,906 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:06:19,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 14:06:19,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe30ce3ba/7c93d16804d141cdad165038446a2997/FLAGa10345c09 [2020-10-29 14:06:20,914 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:06:20,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 14:06:20,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe30ce3ba/7c93d16804d141cdad165038446a2997/FLAGa10345c09 [2020-10-29 14:06:21,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fe30ce3ba/7c93d16804d141cdad165038446a2997 [2020-10-29 14:06:21,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:06:21,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:06:21,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:06:21,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:06:21,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:06:21,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:06:21" (1/1) ... [2020-10-29 14:06:21,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dab0d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:21, skipping insertion in model container [2020-10-29 14:06:21,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:06:21" (1/1) ... [2020-10-29 14:06:21,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:06:21,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:06:22,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:06:22,448 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:06:22,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:06:22,922 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:06:22,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22 WrapperNode [2020-10-29 14:06:22,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:06:22,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:06:22,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:06:22,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:06:22,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (1/1) ... [2020-10-29 14:06:22,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (1/1) ... [2020-10-29 14:06:22,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (1/1) ... [2020-10-29 14:06:22,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (1/1) ... [2020-10-29 14:06:23,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (1/1) ... [2020-10-29 14:06:23,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (1/1) ... [2020-10-29 14:06:23,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (1/1) ... [2020-10-29 14:06:23,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:06:23,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:06:23,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:06:23,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:06:23,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (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 14:06:23,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:06:23,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:06:23,220 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:06:23,220 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:06:23,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:06:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:06:23,221 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:06:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:06:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:06:23,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:06:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:06:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:06:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:06:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:06:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:06:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:06:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:06:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:06:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 14:06:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:06:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:06:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:06:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:06:23,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:06:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:06:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:06:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:06:23,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:06:27,002 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:06:27,003 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:06:27,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:06:27 BoogieIcfgContainer [2020-10-29 14:06:27,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:06:27,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:06:27,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:06:27,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:06:27,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:06:21" (1/3) ... [2020-10-29 14:06:27,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fa3f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:06:27, skipping insertion in model container [2020-10-29 14:06:27,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:06:22" (2/3) ... [2020-10-29 14:06:27,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fa3f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:06:27, skipping insertion in model container [2020-10-29 14:06:27,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:06:27" (3/3) ... [2020-10-29 14:06:27,016 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-29 14:06:27,029 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:06:27,035 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:06:27,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:06:27,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:06:27,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:06:27,085 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:06:27,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:06:27,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:06:27,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:06:27,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:06:27,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:06:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states. [2020-10-29 14:06:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:06:27,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:06:27,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:27,161 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:06:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:06:27,168 INFO L82 PathProgramCache]: Analyzing trace with hash -540047237, now seen corresponding path program 1 times [2020-10-29 14:06:27,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:06:27,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771406930] [2020-10-29 14:06:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:06:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:27,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:29,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:29,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:30,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:31,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:31,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:31,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:32,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:32,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:32,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:06:32,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:06:32,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 14:06:32,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-29 14:06:32,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:06:32,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:06:32,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:06:32,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-29 14:06:32,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-29 14:06:32,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 14:06:34,409 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:06:34,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:06:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:34,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:06:34,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:06:34,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:06:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 14:06:34,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:06:34,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:06:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:06:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:06:34,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:06:34,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:06:34,713 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 14:06:34,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771406930] [2020-10-29 14:06:34,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:06:34,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:06:34,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426949944] [2020-10-29 14:06:34,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:06:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:06:34,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:06:34,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:06:34,742 INFO L87 Difference]: Start difference. First operand 799 states. Second operand 4 states. [2020-10-29 14:06:36,525 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 14:06:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:06:43,618 INFO L93 Difference]: Finished difference Result 1496 states and 2629 transitions. [2020-10-29 14:06:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:06:43,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:06:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:06:43,668 INFO L225 Difference]: With dead ends: 1496 [2020-10-29 14:06:43,668 INFO L226 Difference]: Without dead ends: 1286 [2020-10-29 14:06:43,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:06:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-10-29 14:06:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-10-29 14:06:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-10-29 14:06:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2006 transitions. [2020-10-29 14:06:43,859 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2006 transitions. Word has length 325 [2020-10-29 14:06:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:06:43,867 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2006 transitions. [2020-10-29 14:06:43,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:06:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2006 transitions. [2020-10-29 14:06:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:06:43,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:06:43,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:43,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:06:43,892 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:06:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:06:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1948349173, now seen corresponding path program 1 times [2020-10-29 14:06:43,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:06:43,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781991475] [2020-10-29 14:06:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:06:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:44,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:44,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:44,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:45,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:45,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:45,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:46,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:46,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:46,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:46,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:46,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:46,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:47,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:47,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:49,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:06:49,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:06:49,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:06:49,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 14:06:49,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:06:49,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:06:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:06:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 14:06:49,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-29 14:06:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:06:50,532 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:06:50,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:06:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:50,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:06:50,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:06:50,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:06:50,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 14:06:50,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:06:50,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:06:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:06:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:06:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:06:50,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:06:50,784 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 14:06:50,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781991475] [2020-10-29 14:06:50,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:06:50,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:06:50,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815801853] [2020-10-29 14:06:50,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:06:50,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:06:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:06:50,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:06:50,793 INFO L87 Difference]: Start difference. First operand 1283 states and 2006 transitions. Second operand 4 states. [2020-10-29 14:06:52,232 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 14:06:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:06:58,477 INFO L93 Difference]: Finished difference Result 2615 states and 4121 transitions. [2020-10-29 14:06:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:06:58,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:06:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:06:58,495 INFO L225 Difference]: With dead ends: 2615 [2020-10-29 14:06:58,495 INFO L226 Difference]: Without dead ends: 2250 [2020-10-29 14:06:58,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:06:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-10-29 14:06:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2247. [2020-10-29 14:06:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2247 states. [2020-10-29 14:06:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3508 transitions. [2020-10-29 14:06:58,624 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3508 transitions. Word has length 325 [2020-10-29 14:06:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:06:58,625 INFO L481 AbstractCegarLoop]: Abstraction has 2247 states and 3508 transitions. [2020-10-29 14:06:58,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:06:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3508 transitions. [2020-10-29 14:06:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:06:58,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:06:58,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:58,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:06:58,635 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:06:58,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:06:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1821978594, now seen corresponding path program 1 times [2020-10-29 14:06:58,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:06:58,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714147392] [2020-10-29 14:06:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:06:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:58,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:59,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:59,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:59,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:59,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:59,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:00,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:00,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:00,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:00,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:01,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:01,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:01,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:03,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:03,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:07:03,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:07:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 14:07:03,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:03,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:07:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-29 14:07:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 228 [2020-10-29 14:07:03,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:05,243 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:07:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:05,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:05,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:05,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:05,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:05,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 14:07:05,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:05,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:05,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:05,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:05,462 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 14:07:05,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714147392] [2020-10-29 14:07:05,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:05,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:07:05,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367480642] [2020-10-29 14:07:05,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:07:05,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:07:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:07:05,465 INFO L87 Difference]: Start difference. First operand 2247 states and 3508 transitions. Second operand 4 states. [2020-10-29 14:07:06,917 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 14:07:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:13,084 INFO L93 Difference]: Finished difference Result 4825 states and 7596 transitions. [2020-10-29 14:07:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:07:13,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:07:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:13,110 INFO L225 Difference]: With dead ends: 4825 [2020-10-29 14:07:13,110 INFO L226 Difference]: Without dead ends: 4142 [2020-10-29 14:07:13,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-10-29 14:07:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4139. [2020-10-29 14:07:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-10-29 14:07:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6448 transitions. [2020-10-29 14:07:13,253 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6448 transitions. Word has length 325 [2020-10-29 14:07:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:13,254 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 6448 transitions. [2020-10-29 14:07:13,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:07:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6448 transitions. [2020-10-29 14:07:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:07:13,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:13,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:13,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:07:13,268 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:13,268 INFO L82 PathProgramCache]: Analyzing trace with hash 479714806, now seen corresponding path program 1 times [2020-10-29 14:07:13,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:13,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509059537] [2020-10-29 14:07:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:13,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:13,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:14,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:14,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:14,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:15,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:15,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:15,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:15,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:15,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:15,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:16,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:18,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:18,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:07:18,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:07:18,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 14:07:18,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:18,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:07:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-29 14:07:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 235 [2020-10-29 14:07:18,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:19,806 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:07:19,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:19,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:19,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:19,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:19,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:19,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 14:07:19,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:19,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:19,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:19,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:19,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:19,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:19,964 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 14:07:19,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509059537] [2020-10-29 14:07:19,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:19,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:07:19,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014773231] [2020-10-29 14:07:19,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:07:19,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:07:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:07:19,967 INFO L87 Difference]: Start difference. First operand 4139 states and 6448 transitions. Second operand 4 states. [2020-10-29 14:07:21,451 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-29 14:07:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:27,673 INFO L93 Difference]: Finished difference Result 9129 states and 14344 transitions. [2020-10-29 14:07:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:07:27,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-29 14:07:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:27,715 INFO L225 Difference]: With dead ends: 9129 [2020-10-29 14:07:27,715 INFO L226 Difference]: Without dead ends: 7854 [2020-10-29 14:07:27,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2020-10-29 14:07:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7851. [2020-10-29 14:07:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7851 states. [2020-10-29 14:07:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12200 transitions. [2020-10-29 14:07:27,959 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12200 transitions. Word has length 325 [2020-10-29 14:07:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:27,960 INFO L481 AbstractCegarLoop]: Abstraction has 7851 states and 12200 transitions. [2020-10-29 14:07:27,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:07:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12200 transitions. [2020-10-29 14:07:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-29 14:07:27,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:27,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:27,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:07:27,978 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1772496259, now seen corresponding path program 1 times [2020-10-29 14:07:27,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:27,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881140978] [2020-10-29 14:07:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:28,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:28,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:28,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:29,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:30,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:33,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:33,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-29 14:07:33,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:07:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-29 14:07:33,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:33,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:07:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:07:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-29 14:07:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:34,808 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:07:34,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:34,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:34,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:34,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:34,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:34,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 14:07:34,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:34,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:34,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:34,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:34,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:34,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:35,084 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 14:07:35,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881140978] [2020-10-29 14:07:35,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:35,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:07:35,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030041495] [2020-10-29 14:07:35,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:07:35,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:35,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:07:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:07:35,086 INFO L87 Difference]: Start difference. First operand 7851 states and 12200 transitions. Second operand 5 states. [2020-10-29 14:07:45,015 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-29 14:07:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:07:48,123 INFO L93 Difference]: Finished difference Result 23205 states and 36018 transitions. [2020-10-29 14:07:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:07:48,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-29 14:07:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:07:48,188 INFO L225 Difference]: With dead ends: 23205 [2020-10-29 14:07:48,189 INFO L226 Difference]: Without dead ends: 15387 [2020-10-29 14:07:48,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:07:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15387 states. [2020-10-29 14:07:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15387 to 15384. [2020-10-29 14:07:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15384 states. [2020-10-29 14:07:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15384 states to 15384 states and 23767 transitions. [2020-10-29 14:07:48,945 INFO L78 Accepts]: Start accepts. Automaton has 15384 states and 23767 transitions. Word has length 325 [2020-10-29 14:07:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:07:48,946 INFO L481 AbstractCegarLoop]: Abstraction has 15384 states and 23767 transitions. [2020-10-29 14:07:48,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:07:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 15384 states and 23767 transitions. [2020-10-29 14:07:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-29 14:07:48,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:07:48,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:48,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:07:48,982 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:07:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:07:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1038869709, now seen corresponding path program 1 times [2020-10-29 14:07:48,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:07:48,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761300786] [2020-10-29 14:07:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:07:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:49,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:49,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:49,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:49,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:50,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:50,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:50,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:50,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:50,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:50,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:50,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:50,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:51,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:51,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:54,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:54,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-29 14:07:54,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 14:07:54,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-29 14:07:54,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:54,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:07:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 14:07:54,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-29 14:07:54,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:55,560 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:07:55,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:07:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:07:55,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:07:55,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:07:55,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:07:55,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:07:55,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:07:55,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:07:55,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:07:55,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:07:55,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:07:55,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:07:55,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:07:55,738 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 14:07:55,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761300786] [2020-10-29 14:07:55,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:07:55,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:07:55,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093435939] [2020-10-29 14:07:55,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:07:55,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:07:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:07:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:07:55,741 INFO L87 Difference]: Start difference. First operand 15384 states and 23767 transitions. Second operand 4 states. [2020-10-29 14:08:06,891 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 14:08:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:09,690 INFO L93 Difference]: Finished difference Result 45377 states and 69985 transitions. [2020-10-29 14:08:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:08:09,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-29 14:08:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:09,758 INFO L225 Difference]: With dead ends: 45377 [2020-10-29 14:08:09,759 INFO L226 Difference]: Without dead ends: 30137 [2020-10-29 14:08:09,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:08:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30137 states. [2020-10-29 14:08:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30137 to 30134. [2020-10-29 14:08:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30134 states. [2020-10-29 14:08:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30134 states to 30134 states and 46262 transitions. [2020-10-29 14:08:11,174 INFO L78 Accepts]: Start accepts. Automaton has 30134 states and 46262 transitions. Word has length 327 [2020-10-29 14:08:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:08:11,174 INFO L481 AbstractCegarLoop]: Abstraction has 30134 states and 46262 transitions. [2020-10-29 14:08:11,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:08:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 30134 states and 46262 transitions. [2020-10-29 14:08:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-29 14:08:11,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:08:11,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:08:11,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:08:11,235 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:08:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:08:11,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1798597464, now seen corresponding path program 1 times [2020-10-29 14:08:11,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:08:11,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025603684] [2020-10-29 14:08:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:08:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:11,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:11,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:11,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:11,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:11,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:12,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:12,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:12,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:12,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:12,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:16,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:16,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-29 14:08:16,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:08:16,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 14:08:16,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:16,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:08:16,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:08:16,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-29 14:08:16,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:17,855 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:08:17,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:08:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:17,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:17,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:17,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:08:17,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:08:17,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 14:08:17,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:17,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:08:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:08:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:08:17,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:18,075 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 14:08:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025603684] [2020-10-29 14:08:18,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:08:18,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:08:18,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134472309] [2020-10-29 14:08:18,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:08:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:08:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:08:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:08:18,078 INFO L87 Difference]: Start difference. First operand 30134 states and 46262 transitions. Second operand 5 states. [2020-10-29 14:08:29,078 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-29 14:08:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:08:32,709 INFO L93 Difference]: Finished difference Result 89008 states and 136422 transitions. [2020-10-29 14:08:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:08:32,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-10-29 14:08:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:08:32,806 INFO L225 Difference]: With dead ends: 89008 [2020-10-29 14:08:32,806 INFO L226 Difference]: Without dead ends: 58985 [2020-10-29 14:08:32,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:08:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58985 states. [2020-10-29 14:08:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58985 to 58982. [2020-10-29 14:08:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58982 states. [2020-10-29 14:08:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58982 states to 58982 states and 89918 transitions. [2020-10-29 14:08:36,173 INFO L78 Accepts]: Start accepts. Automaton has 58982 states and 89918 transitions. Word has length 327 [2020-10-29 14:08:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:08:36,174 INFO L481 AbstractCegarLoop]: Abstraction has 58982 states and 89918 transitions. [2020-10-29 14:08:36,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:08:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 58982 states and 89918 transitions. [2020-10-29 14:08:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-29 14:08:36,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:08:36,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:08:36,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:08:36,404 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:08:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:08:36,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1014790693, now seen corresponding path program 1 times [2020-10-29 14:08:36,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:08:36,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717532653] [2020-10-29 14:08:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:08:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:36,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:36,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:37,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:37,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:37,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:37,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:37,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:41,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:41,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-29 14:08:41,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:08:41,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 14:08:41,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:41,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:08:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 14:08:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-29 14:08:41,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:42,873 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:08:42,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:08:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:08:42,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:08:42,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:08:42,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:08:42,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:08:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 14:08:42,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:08:42,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:08:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:08:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:08:42,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:08:42,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:08:43,113 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 14:08:43,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717532653] [2020-10-29 14:08:43,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:08:43,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:08:43,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134559708] [2020-10-29 14:08:43,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:08:43,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:08:43,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:08:43,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:08:43,116 INFO L87 Difference]: Start difference. First operand 58982 states and 89918 transitions. Second operand 4 states. [2020-10-29 14:08:57,141 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 318 [2020-10-29 14:09:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:09:01,426 INFO L93 Difference]: Finished difference Result 173996 states and 264734 transitions. [2020-10-29 14:09:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:09:01,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-10-29 14:09:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:09:01,810 INFO L225 Difference]: With dead ends: 173996 [2020-10-29 14:09:01,810 INFO L226 Difference]: Without dead ends: 115381 [2020-10-29 14:09:01,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:09:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115381 states. [2020-10-29 14:09:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115381 to 115378. [2020-10-29 14:09:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115378 states. [2020-10-29 14:09:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115378 states to 115378 states and 174574 transitions. [2020-10-29 14:09:08,135 INFO L78 Accepts]: Start accepts. Automaton has 115378 states and 174574 transitions. Word has length 329 [2020-10-29 14:09:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:09:08,135 INFO L481 AbstractCegarLoop]: Abstraction has 115378 states and 174574 transitions. [2020-10-29 14:09:08,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:09:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 115378 states and 174574 transitions. [2020-10-29 14:09:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-29 14:09:08,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:09:08,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:08,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:09:08,531 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:09:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:09:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash 649293942, now seen corresponding path program 1 times [2020-10-29 14:09:08,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:09:08,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514168109] [2020-10-29 14:09:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:09:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:08,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:08,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:08,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:09,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:09,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:09,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:09,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:10,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:10,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:10,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:10,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:10,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:10,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:10,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:12,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:12,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:12,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:13,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:13,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-29 14:09:13,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 14:09:13,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 14:09:13,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:13,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:09:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:09:13,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-29 14:09:13,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:15,082 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:09:15,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:09:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:15,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:15,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:15,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:09:15,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:09:15,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:09:15,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:15,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:15,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:09:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:09:15,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:09:15,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:09:15,252 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 14:09:15,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514168109] [2020-10-29 14:09:15,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:09:15,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:09:15,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959970758] [2020-10-29 14:09:15,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:09:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:09:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:09:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:09:15,255 INFO L87 Difference]: Start difference. First operand 115378 states and 174574 transitions. Second operand 5 states. [2020-10-29 14:09:31,963 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-29 14:09:38,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:09:38,552 INFO L93 Difference]: Finished difference Result 340664 states and 514494 transitions. [2020-10-29 14:09:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:09:38,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-29 14:09:38,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:09:39,117 INFO L225 Difference]: With dead ends: 340664 [2020-10-29 14:09:39,117 INFO L226 Difference]: Without dead ends: 225749 [2020-10-29 14:09:39,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:09:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225749 states. [2020-10-29 14:09:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225749 to 225746. [2020-10-29 14:09:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225746 states. [2020-10-29 14:09:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225746 states to 225746 states and 339066 transitions. [2020-10-29 14:09:53,461 INFO L78 Accepts]: Start accepts. Automaton has 225746 states and 339066 transitions. Word has length 329 [2020-10-29 14:09:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:09:53,461 INFO L481 AbstractCegarLoop]: Abstraction has 225746 states and 339066 transitions. [2020-10-29 14:09:53,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:09:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 225746 states and 339066 transitions. [2020-10-29 14:09:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-29 14:09:53,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:09:53,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:53,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:09:53,659 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:09:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:09:53,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1169897374, now seen corresponding path program 1 times [2020-10-29 14:09:53,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:09:53,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556305939] [2020-10-29 14:09:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:09:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:09:53,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:53,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:53,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:53,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:54,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:54,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:54,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:55,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:09:58,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:09:58,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-29 14:09:58,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 14:09:58,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 14:09:58,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:09:58,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:09:58,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:09:58,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:09:58,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-29 14:09:58,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:00,189 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-29 14:10:00,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:10:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:10:00,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:10:00,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:10:00,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:10:00,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:10:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:10:00,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:10:00,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:10:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:10:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:10:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:10:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:10:00,359 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 14:10:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556305939] [2020-10-29 14:10:00,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:10:00,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:10:00,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529909702] [2020-10-29 14:10:00,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:10:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:10:00,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:10:00,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:10:00,362 INFO L87 Difference]: Start difference. First operand 225746 states and 339066 transitions. Second operand 5 states.