/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/loop-industry-pattern/ofuf_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:40:26,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:40:26,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:40:26,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:40:26,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:40:26,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:40:26,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:40:26,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:40:26,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:40:26,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:40:26,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:40:26,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:40:26,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:40:26,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:40:26,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:40:26,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:40:26,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:40:26,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:40:26,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:40:26,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:40:26,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:40:26,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:40:26,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:40:26,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:40:26,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:40:26,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:40:26,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:40:26,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:40:26,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:40:26,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:40:26,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:40:26,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:40:26,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:40:26,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:40:26,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:40:26,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:40:26,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:40:26,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:40:26,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:40:26,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:40:26,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:40:26,898 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 09:40:26,957 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:40:26,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:40:26,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:40:26,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:40:26,962 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:40:26,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:40:26,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:40:26,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:40:26,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:40:26,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:40:26,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:40:26,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:40:26,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:40:26,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:40:26,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:40:26,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:40:26,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:40:26,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:40:26,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:40:26,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:40:26,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:40:26,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:40:26,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:40:26,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:40:26,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:40:26,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:40:26,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:40:26,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:40:26,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:40:26,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:40:27,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:40:27,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:40:27,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:40:27,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:40:27,490 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:40:27,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_1.c [2020-10-29 09:40:27,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09235d787/9657f29cc084418fbd5fe36dad580790/FLAGdd5de3c38 [2020-10-29 09:40:28,249 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:40:28,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_1.c [2020-10-29 09:40:28,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09235d787/9657f29cc084418fbd5fe36dad580790/FLAGdd5de3c38 [2020-10-29 09:40:28,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09235d787/9657f29cc084418fbd5fe36dad580790 [2020-10-29 09:40:28,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:40:28,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:40:28,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:40:28,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:40:28,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:40:28,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:40:28" (1/1) ... [2020-10-29 09:40:28,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589e170e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:28, skipping insertion in model container [2020-10-29 09:40:28,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:40:28" (1/1) ... [2020-10-29 09:40:28,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:40:28,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:40:28,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:40:28,941 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:40:29,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:40:29,049 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:40:29,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29 WrapperNode [2020-10-29 09:40:29,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:40:29,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:40:29,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:40:29,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:40:29,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (1/1) ... [2020-10-29 09:40:29,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (1/1) ... [2020-10-29 09:40:29,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (1/1) ... [2020-10-29 09:40:29,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (1/1) ... [2020-10-29 09:40:29,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (1/1) ... [2020-10-29 09:40:29,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (1/1) ... [2020-10-29 09:40:29,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (1/1) ... [2020-10-29 09:40:29,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:40:29,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:40:29,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:40:29,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:40:29,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (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 09:40:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:40:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:40:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:40:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 09:40:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-10-29 09:40:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_107 [2020-10-29 09:40:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_110 [2020-10-29 09:40:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_113 [2020-10-29 09:40:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_114 [2020-10-29 09:40:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_115 [2020-10-29 09:40:29,336 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_117 [2020-10-29 09:40:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_118 [2020-10-29 09:40:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:40:29,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:40:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:40:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:40:29,337 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:40:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:40:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 09:40:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-10-29 09:40:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-10-29 09:40:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_107 [2020-10-29 09:40:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_110 [2020-10-29 09:40:29,338 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_113 [2020-10-29 09:40:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_114 [2020-10-29 09:40:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_115 [2020-10-29 09:40:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 09:40:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_117 [2020-10-29 09:40:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_118 [2020-10-29 09:40:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-10-29 09:40:29,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:40:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:40:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:40:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:40:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:40:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:40:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:40:29,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 09:40:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:40:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:40:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-29 09:40:29,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:40:30,496 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:40:30,497 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-29 09:40:30,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:40:30 BoogieIcfgContainer [2020-10-29 09:40:30,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:40:30,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:40:30,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:40:30,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:40:30,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:40:28" (1/3) ... [2020-10-29 09:40:30,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217e6b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:40:30, skipping insertion in model container [2020-10-29 09:40:30,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:40:29" (2/3) ... [2020-10-29 09:40:30,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217e6b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:40:30, skipping insertion in model container [2020-10-29 09:40:30,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:40:30" (3/3) ... [2020-10-29 09:40:30,509 INFO L111 eAbstractionObserver]: Analyzing ICFG ofuf_1.c [2020-10-29 09:40:30,529 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:40:30,535 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:40:30,549 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:40:30,580 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:40:30,581 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:40:30,581 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:40:30,581 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:40:30,581 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:40:30,581 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:40:30,581 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:40:30,582 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:40:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-10-29 09:40:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:40:30,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:30,615 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] [2020-10-29 09:40:30,616 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:30,622 INFO L82 PathProgramCache]: Analyzing trace with hash 636648653, now seen corresponding path program 1 times [2020-10-29 09:40:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:30,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322034681] [2020-10-29 09:40:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:31,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:31,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:31,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:32,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:35,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:35,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:40:35,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:40:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:40:35,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:35,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:35,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:40:35,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:40:35,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:40:35,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:40:36,468 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:40:36,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:36,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:36,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:36,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:36,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:36,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-29 09:40:36,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:36,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:36,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:40:36,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:36,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:40:36,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:40:36,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:40:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:36,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:36,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:36,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:36,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:36,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-29 09:40:36,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:40:36,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-29 09:40:36,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:36,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:36,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:40:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:40:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:40:36,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:40:36,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-29 09:40:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:36,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:36,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:36,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:36,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:40:36,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:40:36,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:40:36,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:36,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:40:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:36,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:40:36,786 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 09:40:36,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322034681] [2020-10-29 09:40:36,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:40:36,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-29 09:40:36,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135515663] [2020-10-29 09:40:36,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:40:36,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:36,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:40:36,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:40:36,827 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 12 states. [2020-10-29 09:40:37,200 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:40:37,676 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 09:40:38,489 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 09:40:38,894 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 09:40:39,533 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 09:40:39,997 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 09:40:40,511 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:40:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:42,383 INFO L93 Difference]: Finished difference Result 284 states and 436 transitions. [2020-10-29 09:40:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:40:42,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-29 09:40:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:42,402 INFO L225 Difference]: With dead ends: 284 [2020-10-29 09:40:42,402 INFO L226 Difference]: Without dead ends: 148 [2020-10-29 09:40:42,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:40:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-29 09:40:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-29 09:40:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-29 09:40:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 204 transitions. [2020-10-29 09:40:42,506 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 204 transitions. Word has length 39 [2020-10-29 09:40:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:42,506 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 204 transitions. [2020-10-29 09:40:42,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:40:42,507 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 204 transitions. [2020-10-29 09:40:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:40:42,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:42,511 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] [2020-10-29 09:40:42,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:40:42,512 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:42,513 INFO L82 PathProgramCache]: Analyzing trace with hash 868739572, now seen corresponding path program 1 times [2020-10-29 09:40:42,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:42,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573495762] [2020-10-29 09:40:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:42,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:42,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:42,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:42,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:43,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:43,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:47,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:47,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:40:47,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:40:47,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:40:47,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:47,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:47,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:40:47,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:40:47,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:40:47,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:40:48,029 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:40:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:48,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:48,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:48,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:48,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-29 09:40:48,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:48,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:40:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:48,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:40:48,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:40:48,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:40:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:48,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:48,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:48,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:48,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:48,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-29 09:40:48,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:40:48,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-29 09:40:48,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:48,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:48,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:40:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:40:48,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:40:48,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:48,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-29 09:40:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:48,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:48,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:48,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:40:48,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:48,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:40:48,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:48,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:48,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:40:48,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:40:48,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:40:48,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:48,364 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 09:40:48,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573495762] [2020-10-29 09:40:48,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:40:48,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-29 09:40:48,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054463857] [2020-10-29 09:40:48,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:40:48,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:48,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:40:48,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:40:48,369 INFO L87 Difference]: Start difference. First operand 146 states and 204 transitions. Second operand 15 states. [2020-10-29 09:40:48,678 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:40:49,158 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 09:40:49,975 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 09:40:50,431 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-29 09:40:51,066 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 09:40:51,480 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 09:40:51,999 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:40:52,572 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 09:40:53,208 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 09:40:53,716 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 09:40:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:54,796 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2020-10-29 09:40:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:40:54,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-29 09:40:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:54,801 INFO L225 Difference]: With dead ends: 163 [2020-10-29 09:40:54,802 INFO L226 Difference]: Without dead ends: 140 [2020-10-29 09:40:54,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:40:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-29 09:40:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2020-10-29 09:40:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-29 09:40:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2020-10-29 09:40:54,834 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 40 [2020-10-29 09:40:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:54,835 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2020-10-29 09:40:54,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:40:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2020-10-29 09:40:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:40:54,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:54,838 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] [2020-10-29 09:40:54,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:40:54,838 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:54,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1144158803, now seen corresponding path program 1 times [2020-10-29 09:40:54,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:54,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450529371] [2020-10-29 09:40:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:54,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:54,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:54,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:55,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:55,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:55,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:57,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:59,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:59,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:40:59,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:40:59,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 09:40:59,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:59,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:59,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:40:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:40:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:40:59,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:00,363 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:41:00,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:41:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:00,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:00,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:00,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:41:00,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:00,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 09:41:00,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:00,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:41:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:41:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:41:00,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:00,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:41:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:00,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:00,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:00,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:00,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:00,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:41:00,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:41:00,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-29 09:41:00,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:00,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:00,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:41:00,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:41:00,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:41:00,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:41:00,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-29 09:41:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:00,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:00,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:00,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:41:00,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:00,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:41:00,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:00,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:00,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:41:00,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:41:00,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:41:00,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:41:00,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450529371] [2020-10-29 09:41:00,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:41:00,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:41:00,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259253807] [2020-10-29 09:41:00,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:41:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:41:00,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:41:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:41:00,921 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand 16 states. [2020-10-29 09:41:01,201 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:41:01,737 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 09:41:02,894 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:41:03,393 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 09:41:04,150 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 09:41:04,630 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 09:41:05,119 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 09:41:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:41:06,878 INFO L93 Difference]: Finished difference Result 197 states and 270 transitions. [2020-10-29 09:41:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:41:06,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-29 09:41:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:41:06,888 INFO L225 Difference]: With dead ends: 197 [2020-10-29 09:41:06,888 INFO L226 Difference]: Without dead ends: 166 [2020-10-29 09:41:06,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:41:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-29 09:41:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-10-29 09:41:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 09:41:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 230 transitions. [2020-10-29 09:41:06,930 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 230 transitions. Word has length 41 [2020-10-29 09:41:06,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:41:06,931 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 230 transitions. [2020-10-29 09:41:06,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:41:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 230 transitions. [2020-10-29 09:41:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:41:06,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:41:06,934 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:41:06,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:41:06,934 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:41:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:41:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1346930223, now seen corresponding path program 1 times [2020-10-29 09:41:06,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:41:06,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985132739] [2020-10-29 09:41:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:41:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:07,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:07,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:07,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:07,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:07,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:07,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:11,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:11,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:41:11,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:41:11,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 09:41:11,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:11,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:41:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:41:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:41:11,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:12,542 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:41:12,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:41:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:12,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:12,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:41:12,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:12,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 09:41:12,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:12,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:41:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:41:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:41:12,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:12,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:41:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:12,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:12,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:12,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:12,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:12,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-29 09:41:12,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:41:12,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-29 09:41:12,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:12,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:12,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:41:12,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:41:12,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:41:12,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:12,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 09:41:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:12,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:12,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:41:12,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:12,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:41:12,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:12,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:12,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:41:12,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:41:12,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:41:12,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:41:12,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985132739] [2020-10-29 09:41:12,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:41:12,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:41:12,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761214879] [2020-10-29 09:41:12,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:41:12,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:41:12,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:41:12,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:41:12,790 INFO L87 Difference]: Start difference. First operand 164 states and 230 transitions. Second operand 14 states. [2020-10-29 09:41:13,111 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:41:13,560 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 09:41:14,337 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 09:41:14,818 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 09:41:15,445 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 09:41:15,904 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 09:41:16,658 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 09:41:17,122 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-29 09:41:17,624 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:41:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:41:19,433 INFO L93 Difference]: Finished difference Result 211 states and 288 transitions. [2020-10-29 09:41:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:41:19,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-29 09:41:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:41:19,438 INFO L225 Difference]: With dead ends: 211 [2020-10-29 09:41:19,438 INFO L226 Difference]: Without dead ends: 180 [2020-10-29 09:41:19,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:41:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-29 09:41:19,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 164. [2020-10-29 09:41:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 09:41:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 230 transitions. [2020-10-29 09:41:19,504 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 230 transitions. Word has length 43 [2020-10-29 09:41:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:41:19,507 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 230 transitions. [2020-10-29 09:41:19,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:41:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 230 transitions. [2020-10-29 09:41:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:41:19,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:41:19,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:41:19,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:41:19,510 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:41:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:41:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash 216343474, now seen corresponding path program 1 times [2020-10-29 09:41:19,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:41:19,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777738093] [2020-10-29 09:41:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:41:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:19,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:19,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:19,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:19,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:21,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:23,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:24,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:24,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:41:24,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:41:24,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 09:41:24,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:24,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:41:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:41:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:41:24,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:25,269 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:41:25,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:41:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:25,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:25,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:25,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:41:25,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:25,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-29 09:41:25,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:25,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:41:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:41:25,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:41:25,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:25,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:41:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:25,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:25,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:25,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:25,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:25,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:41:25,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:41:25,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-29 09:41:25,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:25,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:25,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:41:25,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:41:25,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:41:25,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:25,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-29 09:41:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:25,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:25,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:41:25,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:25,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:41:25,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:25,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:41:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:41:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:41:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:41:25,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777738093] [2020-10-29 09:41:25,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:41:25,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:41:25,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446500542] [2020-10-29 09:41:25,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:41:25,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:41:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:41:25,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:41:25,990 INFO L87 Difference]: Start difference. First operand 164 states and 230 transitions. Second operand 19 states. [2020-10-29 09:41:26,331 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:41:26,947 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 09:41:27,714 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-29 09:41:28,542 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:41:29,094 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 09:41:29,866 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 09:41:30,375 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 09:41:30,977 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 09:41:31,634 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:41:32,358 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:41:32,884 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:41:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:41:36,492 INFO L93 Difference]: Finished difference Result 283 states and 398 transitions. [2020-10-29 09:41:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:41:36,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-29 09:41:36,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:41:36,495 INFO L225 Difference]: With dead ends: 283 [2020-10-29 09:41:36,495 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 09:41:36,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:41:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 09:41:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-29 09:41:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-29 09:41:36,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 192 transitions. [2020-10-29 09:41:36,521 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 192 transitions. Word has length 42 [2020-10-29 09:41:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:41:36,522 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 192 transitions. [2020-10-29 09:41:36,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:41:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 192 transitions. [2020-10-29 09:41:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:41:36,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:41:36,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:41:36,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:41:36,524 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:41:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:41:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1900251051, now seen corresponding path program 2 times [2020-10-29 09:41:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:41:36,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626592485] [2020-10-29 09:41:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:41:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:36,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:36,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:36,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:36,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:36,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:37,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:40,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:41,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:41,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:41:41,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:41:41,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 09:41:41,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:41,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:41,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:41:41,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:41:41,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:41:41,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:42,090 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:41:42,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:41:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:42,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:42,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:42,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:41:42,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:42,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-29 09:41:42,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:42,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:41:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:41:42,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:41:42,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:42,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:41:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:42,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:42,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:42,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:42,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:42,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:41:42,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:41:42,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-29 09:41:42,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:42,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:41:42,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:41:42,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:41:42,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:43,048 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-10-29 09:41:43,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-29 09:41:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:43,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:43,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:43,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:41:43,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:43,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:41:43,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:43,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:41:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:41:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:41:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:41:43,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626592485] [2020-10-29 09:41:43,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:41:43,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:41:43,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951942615] [2020-10-29 09:41:43,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:41:43,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:41:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:41:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:41:43,270 INFO L87 Difference]: Start difference. First operand 138 states and 192 transitions. Second operand 18 states. [2020-10-29 09:41:43,657 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:41:44,365 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:41:45,249 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-29 09:41:47,929 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-29 09:41:48,768 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:41:49,326 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 09:41:50,285 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 09:41:50,827 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:41:51,362 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:41:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:41:53,770 INFO L93 Difference]: Finished difference Result 199 states and 272 transitions. [2020-10-29 09:41:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:41:53,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-29 09:41:53,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:41:53,774 INFO L225 Difference]: With dead ends: 199 [2020-10-29 09:41:53,774 INFO L226 Difference]: Without dead ends: 168 [2020-10-29 09:41:53,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:41:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-29 09:41:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-29 09:41:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 09:41:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 232 transitions. [2020-10-29 09:41:53,799 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 232 transitions. Word has length 43 [2020-10-29 09:41:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:41:53,799 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 232 transitions. [2020-10-29 09:41:53,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:41:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 232 transitions. [2020-10-29 09:41:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:41:53,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:41:53,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:41:53,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:41:53,802 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:41:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:41:53,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2142895955, now seen corresponding path program 1 times [2020-10-29 09:41:53,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:41:53,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701285178] [2020-10-29 09:41:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:41:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:53,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:53,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:53,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:53,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:58,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:58,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:41:58,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:41:58,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 09:41:58,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:58,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:58,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:41:58,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:41:58,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:41:58,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:59,422 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:41:59,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:41:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:59,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:59,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:59,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:41:59,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:59,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 09:41:59,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:59,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:41:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:41:59,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:41:59,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:59,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:41:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:59,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:59,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:59,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:59,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:41:59,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:41:59,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-29 09:41:59,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:59,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:41:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:41:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:41:59,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:59,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-29 09:41:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:41:59,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:41:59,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:41:59,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:41:59,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:41:59,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:41:59,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:41:59,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:41:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:41:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:41:59,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:41:59,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:41:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:41:59,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701285178] [2020-10-29 09:41:59,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:41:59,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:41:59,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806823501] [2020-10-29 09:41:59,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:41:59,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:41:59,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:41:59,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:41:59,860 INFO L87 Difference]: Start difference. First operand 166 states and 232 transitions. Second operand 16 states. [2020-10-29 09:42:00,226 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:42:00,917 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:42:01,151 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2020-10-29 09:42:02,144 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 09:42:02,701 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 09:42:03,364 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:42:03,842 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 09:42:04,668 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 09:42:05,176 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:42:05,699 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:42:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:09,324 INFO L93 Difference]: Finished difference Result 215 states and 294 transitions. [2020-10-29 09:42:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:42:09,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-29 09:42:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:09,327 INFO L225 Difference]: With dead ends: 215 [2020-10-29 09:42:09,327 INFO L226 Difference]: Without dead ends: 184 [2020-10-29 09:42:09,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:42:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-29 09:42:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 166. [2020-10-29 09:42:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 09:42:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 232 transitions. [2020-10-29 09:42:09,364 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 232 transitions. Word has length 45 [2020-10-29 09:42:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:09,366 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 232 transitions. [2020-10-29 09:42:09,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:42:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 232 transitions. [2020-10-29 09:42:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:42:09,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:09,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:09,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:42:09,369 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash 328918512, now seen corresponding path program 2 times [2020-10-29 09:42:09,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:09,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178008390] [2020-10-29 09:42:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:09,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:09,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:09,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:09,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:09,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:10,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:12,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:14,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:14,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:42:14,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:42:14,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 09:42:14,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:14,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:14,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:42:14,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:42:14,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:42:14,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:15,012 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:42:15,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:15,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:15,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:15,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:15,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 09:42:15,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:15,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:42:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:42:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:42:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:15,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:15,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:15,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:15,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:15,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:42:15,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:42:15,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-29 09:42:15,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:15,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:42:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:42:15,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:42:15,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:16,085 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-10-29 09:42:16,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-29 09:42:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:16,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:16,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:42:16,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:16,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178008390] [2020-10-29 09:42:16,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:16,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:42:16,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772126890] [2020-10-29 09:42:16,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:42:16,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:16,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:42:16,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:42:16,407 INFO L87 Difference]: Start difference. First operand 166 states and 232 transitions. Second operand 21 states. [2020-10-29 09:42:16,726 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:42:17,440 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 09:42:18,187 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-29 09:42:18,781 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-29 09:42:19,643 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:42:20,197 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 09:42:21,124 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 09:42:21,640 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 09:42:22,149 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:42:22,714 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 09:42:23,476 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:42:23,996 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 09:42:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:27,538 INFO L93 Difference]: Finished difference Result 197 states and 268 transitions. [2020-10-29 09:42:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:42:27,539 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-10-29 09:42:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:27,542 INFO L225 Difference]: With dead ends: 197 [2020-10-29 09:42:27,542 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 09:42:27,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=328, Invalid=1154, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:42:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 09:42:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2020-10-29 09:42:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-29 09:42:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 236 transitions. [2020-10-29 09:42:27,569 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 236 transitions. Word has length 44 [2020-10-29 09:42:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:27,569 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 236 transitions. [2020-10-29 09:42:27,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:42:27,569 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 236 transitions. [2020-10-29 09:42:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:42:27,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:27,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:27,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:42:27,572 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:27,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1112424114, now seen corresponding path program 1 times [2020-10-29 09:42:27,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:27,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284403496] [2020-10-29 09:42:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:27,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:27,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:27,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:29,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:32,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:32,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:42:32,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:42:32,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 09:42:32,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:32,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:42:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:42:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:42:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:32,811 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-10-29 09:42:33,602 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:42:33,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:33,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:33,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:33,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:33,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:33,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 09:42:33,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:33,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:42:33,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:33,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:42:33,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:33,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:42:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:33,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:33,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:33,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:33,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:33,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:42:33,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:42:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-29 09:42:33,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:33,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:33,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:42:33,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:42:33,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:42:33,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:33,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-29 09:42:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:33,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:33,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:42:33,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:33,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:42:33,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:33,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:42:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:42:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:42:33,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:34,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284403496] [2020-10-29 09:42:34,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:34,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:42:34,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852660505] [2020-10-29 09:42:34,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:42:34,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:42:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:42:34,110 INFO L87 Difference]: Start difference. First operand 170 states and 236 transitions. Second operand 19 states. [2020-10-29 09:42:34,477 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:42:35,300 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:42:36,610 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 09:42:37,226 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 09:42:37,997 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-29 09:42:38,569 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 09:42:39,477 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 09:42:39,997 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:42:40,577 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 09:42:41,059 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:42:41,946 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 09:42:42,471 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:42:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:42:45,915 INFO L93 Difference]: Finished difference Result 187 states and 254 transitions. [2020-10-29 09:42:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:42:45,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-29 09:42:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:42:45,918 INFO L225 Difference]: With dead ends: 187 [2020-10-29 09:42:45,918 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 09:42:45,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:42:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 09:42:45,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2020-10-29 09:42:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-29 09:42:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 218 transitions. [2020-10-29 09:42:45,939 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 218 transitions. Word has length 46 [2020-10-29 09:42:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:42:45,939 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 218 transitions. [2020-10-29 09:42:45,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:42:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 218 transitions. [2020-10-29 09:42:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:42:45,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:42:45,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:42:45,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:42:45,941 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:42:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:42:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash -433329926, now seen corresponding path program 1 times [2020-10-29 09:42:45,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:42:45,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905658848] [2020-10-29 09:42:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:42:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:45,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:46,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:46,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:46,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:46,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:47,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:50,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:50,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:42:50,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:42:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:42:50,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:50,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:42:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:42:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:42:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:51,362 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2020-10-29 09:42:51,595 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 13 [2020-10-29 09:42:52,163 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:42:52,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:42:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:52,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:52,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:42:52,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:52,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-29 09:42:52,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:52,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:42:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:42:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:42:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:52,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:42:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:52,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:42:52,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:52,783 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-29 09:42:52,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-29 09:42:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:42:52,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:42:52,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:42:52,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:42:52,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:42:52,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:42:52,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:42:52,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:42:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:42:52,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:42:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:42:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:42:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:42:52,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905658848] [2020-10-29 09:42:52,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:42:52,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:42:52,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067338179] [2020-10-29 09:42:52,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:42:52,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:42:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:42:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:42:52,928 INFO L87 Difference]: Start difference. First operand 156 states and 218 transitions. Second operand 19 states. [2020-10-29 09:42:53,260 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:42:54,111 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:42:55,095 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-10-29 09:42:56,008 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:42:56,649 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 09:42:58,110 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 09:42:58,657 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:42:59,247 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 09:43:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:02,119 INFO L93 Difference]: Finished difference Result 216 states and 295 transitions. [2020-10-29 09:43:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:43:02,120 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-29 09:43:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:02,122 INFO L225 Difference]: With dead ends: 216 [2020-10-29 09:43:02,122 INFO L226 Difference]: Without dead ends: 185 [2020-10-29 09:43:02,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:43:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-29 09:43:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2020-10-29 09:43:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-29 09:43:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 246 transitions. [2020-10-29 09:43:02,148 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 246 transitions. Word has length 45 [2020-10-29 09:43:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:02,149 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 246 transitions. [2020-10-29 09:43:02,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:43:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 246 transitions. [2020-10-29 09:43:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:43:02,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:02,150 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] [2020-10-29 09:43:02,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:43:02,150 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:02,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1441166869, now seen corresponding path program 1 times [2020-10-29 09:43:02,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:02,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648665603] [2020-10-29 09:43:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:02,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:02,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:02,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:02,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:02,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:07,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:07,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:43:07,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:43:07,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:43:07,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:07,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:07,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:43:07,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:43:07,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:43:07,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:08,025 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:43:08,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:08,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:08,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:08,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:08,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:08,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 09:43:08,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:08,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:43:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:08,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:43:08,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:08,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:43:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:08,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:08,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:08,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:08,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:43:08,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:43:08,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-29 09:43:08,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:08,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:43:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:43:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:43:08,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:08,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-29 09:43:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:08,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:08,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:08,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:43:08,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:08,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:43:08,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:08,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:08,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:43:08,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:43:08,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:43:08,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:08,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648665603] [2020-10-29 09:43:08,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:08,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:43:08,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856385254] [2020-10-29 09:43:08,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:43:08,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:08,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:43:08,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:43:08,393 INFO L87 Difference]: Start difference. First operand 176 states and 246 transitions. Second operand 20 states. [2020-10-29 09:43:08,762 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:43:09,604 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 09:43:10,759 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:43:11,272 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:43:12,484 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 09:43:12,993 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 09:43:13,657 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:43:14,368 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 09:43:15,004 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 09:43:15,473 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:43:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:17,243 INFO L93 Difference]: Finished difference Result 211 states and 290 transitions. [2020-10-29 09:43:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:43:17,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-29 09:43:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:17,253 INFO L225 Difference]: With dead ends: 211 [2020-10-29 09:43:17,253 INFO L226 Difference]: Without dead ends: 188 [2020-10-29 09:43:17,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:43:17,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-29 09:43:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 148. [2020-10-29 09:43:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-29 09:43:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 206 transitions. [2020-10-29 09:43:17,285 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 206 transitions. Word has length 46 [2020-10-29 09:43:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:17,285 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 206 transitions. [2020-10-29 09:43:17,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:43:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 206 transitions. [2020-10-29 09:43:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:43:17,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:17,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:17,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:43:17,287 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1496394837, now seen corresponding path program 2 times [2020-10-29 09:43:17,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:17,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039805045] [2020-10-29 09:43:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:17,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:17,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:17,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:17,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:17,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:22,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:43:22,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:23,030 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:43:23,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:23,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:23,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:23,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:23,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 09:43:23,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:23,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:43:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:23,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:43:23,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:23,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:43:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:23,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:23,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:23,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:23,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:43:23,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:43:23,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-29 09:43:23,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:23,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:43:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:43:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:43:23,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:23,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-29 09:43:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:23,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:23,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:23,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:43:23,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:23,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:43:23,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:23,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:23,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:43:23,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:23,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:23,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039805045] [2020-10-29 09:43:23,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:23,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:43:23,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148276023] [2020-10-29 09:43:23,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:43:23,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:43:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:43:23,575 INFO L87 Difference]: Start difference. First operand 148 states and 206 transitions. Second operand 17 states. [2020-10-29 09:43:23,939 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:43:24,745 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:43:26,151 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 09:43:26,736 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 09:43:27,443 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:43:27,960 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 09:43:28,857 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 09:43:29,360 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:43:29,882 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:43:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:31,890 INFO L93 Difference]: Finished difference Result 217 states and 294 transitions. [2020-10-29 09:43:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:43:31,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-10-29 09:43:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:31,894 INFO L225 Difference]: With dead ends: 217 [2020-10-29 09:43:31,894 INFO L226 Difference]: Without dead ends: 186 [2020-10-29 09:43:31,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:43:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-29 09:43:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2020-10-29 09:43:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:43:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 250 transitions. [2020-10-29 09:43:31,924 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 250 transitions. Word has length 47 [2020-10-29 09:43:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:31,925 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 250 transitions. [2020-10-29 09:43:31,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:43:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 250 transitions. [2020-10-29 09:43:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:43:31,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:31,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:31,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:43:31,939 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash -235469741, now seen corresponding path program 3 times [2020-10-29 09:43:31,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:31,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130592305] [2020-10-29 09:43:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:31,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:32,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:32,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:32,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:32,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:34,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:43:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:43:36,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:37,144 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2020-10-29 09:43:37,707 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:43:37,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:37,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:37,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:43:37,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:37,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:43:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:37,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:37,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:37,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:37,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-29 09:43:37,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:43:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-29 09:43:37,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:37,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:43:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:43:37,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:43:37,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:38,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-29 09:43:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:38,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:38,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:38,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:43:38,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:38,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:43:38,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:38,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:38,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:43:38,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-29 09:43:38,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:43:38,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:38,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130592305] [2020-10-29 09:43:38,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:38,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:43:38,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636982071] [2020-10-29 09:43:38,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:43:38,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:43:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:43:38,069 INFO L87 Difference]: Start difference. First operand 180 states and 250 transitions. Second operand 18 states. [2020-10-29 09:43:38,427 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:43:39,138 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:43:40,376 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 09:43:40,947 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 09:43:41,681 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 09:43:42,211 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 09:43:42,936 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:43:43,448 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 09:43:44,257 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 09:43:44,757 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:43:45,255 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-29 09:43:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:43:47,411 INFO L93 Difference]: Finished difference Result 231 states and 312 transitions. [2020-10-29 09:43:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:43:47,412 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-29 09:43:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:43:47,415 INFO L225 Difference]: With dead ends: 231 [2020-10-29 09:43:47,415 INFO L226 Difference]: Without dead ends: 200 [2020-10-29 09:43:47,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:43:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-29 09:43:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 180. [2020-10-29 09:43:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 09:43:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 250 transitions. [2020-10-29 09:43:47,444 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 250 transitions. Word has length 49 [2020-10-29 09:43:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:43:47,445 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 250 transitions. [2020-10-29 09:43:47,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:43:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 250 transitions. [2020-10-29 09:43:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:43:47,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:43:47,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:43:47,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:43:47,447 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:43:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:43:47,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1749241360, now seen corresponding path program 2 times [2020-10-29 09:43:47,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:43:47,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12265107] [2020-10-29 09:43:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:43:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:47,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:47,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:47,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:47,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:47,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:49,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:52,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:52,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:43:52,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:43:52,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:43:52,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:52,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:43:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:43:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:43:52,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:52,663 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-29 09:43:53,454 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 09:43:53,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:43:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:53,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:53,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:53,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:43:53,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:53,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 09:43:53,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:53,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:43:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:43:53,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:43:53,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:53,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-29 09:43:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:53,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:53,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:53,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:53,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:53,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-29 09:43:53,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:43:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-29 09:43:53,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:53,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:43:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:43:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:43:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:54,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-29 09:43:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:43:54,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:43:54,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:43:54,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:43:54,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:43:54,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:43:54,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:43:54,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:43:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:43:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:43:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:43:54,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:43:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:43:54,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12265107] [2020-10-29 09:43:54,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:43:54,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:43:54,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813585845] [2020-10-29 09:43:54,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:43:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:43:54,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:43:54,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:43:54,356 INFO L87 Difference]: Start difference. First operand 180 states and 250 transitions. Second operand 20 states. [2020-10-29 09:43:54,733 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 09:43:55,539 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-29 09:43:57,038 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 09:43:57,643 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 09:43:58,415 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-29 09:43:58,969 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 09:44:00,027 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 09:44:00,581 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-29 09:44:01,228 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 09:44:01,835 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-29 09:44:02,500 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-29 09:44:03,035 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 147