/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:37:07,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:37:07,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:37:07,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:37:07,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:37:07,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:37:07,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:37:07,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:37:07,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:37:07,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:37:07,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:37:07,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:37:07,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:37:07,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:37:07,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:37:07,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:37:07,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:37:07,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:37:07,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:37:07,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:37:07,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:37:07,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:37:07,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:37:07,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:37:07,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:37:07,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:37:07,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:37:07,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:37:07,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:37:08,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:37:08,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:37:08,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:37:08,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:37:08,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:37:08,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:37:08,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:37:08,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:37:08,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:37:08,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:37:08,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:37:08,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:37:08,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:37:08,045 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:37:08,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:37:08,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:37:08,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:37:08,047 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:37:08,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:37:08,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:37:08,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:37:08,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:37:08,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:37:08,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:37:08,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:37:08,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:37:08,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:37:08,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:37:08,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:37:08,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:37:08,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:37:08,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:37:08,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:37:08,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:37:08,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:37:08,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:37:08,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:37:08,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:37:08,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:37:08,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:37:08,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:37:08,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:37:08,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:37:08,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:37:08,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:37:08,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:37:08,473 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:37:08,474 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:37:08,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_5.c [2020-10-27 01:37:08,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55fb82473/d5f58bea9a1a4eee982eff68110d6a12/FLAGd8667e44d [2020-10-27 01:37:09,267 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:37:09,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/ofuf_5.c [2020-10-27 01:37:09,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55fb82473/d5f58bea9a1a4eee982eff68110d6a12/FLAGd8667e44d [2020-10-27 01:37:09,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/55fb82473/d5f58bea9a1a4eee982eff68110d6a12 [2020-10-27 01:37:09,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:37:09,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:37:09,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:37:09,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:37:09,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:37:09,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:37:09" (1/1) ... [2020-10-27 01:37:09,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b02d6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:09, skipping insertion in model container [2020-10-27 01:37:09,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:37:09" (1/1) ... [2020-10-27 01:37:09,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:37:09,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:37:09,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:37:09,972 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:37:10,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:37:10,080 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:37:10,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10 WrapperNode [2020-10-27 01:37:10,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:37:10,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:37:10,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:37:10,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:37:10,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (1/1) ... [2020-10-27 01:37:10,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (1/1) ... [2020-10-27 01:37:10,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (1/1) ... [2020-10-27 01:37:10,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (1/1) ... [2020-10-27 01:37:10,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (1/1) ... [2020-10-27 01:37:10,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (1/1) ... [2020-10-27 01:37:10,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (1/1) ... [2020-10-27 01:37:10,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:37:10,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:37:10,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:37:10,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:37:10,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:37:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:37:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:37:10,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:37:10,283 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:37:10,284 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-10-27 01:37:10,284 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-10-27 01:37:10,285 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-10-27 01:37:10,285 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-10-27 01:37:10,286 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-10-27 01:37:10,286 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-10-27 01:37:10,288 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-10-27 01:37:10,288 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-10-27 01:37:10,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:37:10,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:37:10,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:37:10,289 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:37:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:37:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:37:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:37:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-10-27 01:37:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-10-27 01:37:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-10-27 01:37:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-10-27 01:37:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-10-27 01:37:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-10-27 01:37:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-10-27 01:37:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:37:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-10-27 01:37:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-10-27 01:37:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-10-27 01:37:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:37:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:37:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:37:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:37:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:37:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:37:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:37:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:37:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:37:10,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:37:10,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-27 01:37:10,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:37:11,480 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:37:11,481 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-27 01:37:11,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:37:11 BoogieIcfgContainer [2020-10-27 01:37:11,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:37:11,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:37:11,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:37:11,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:37:11,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:37:09" (1/3) ... [2020-10-27 01:37:11,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b237cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:37:11, skipping insertion in model container [2020-10-27 01:37:11,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:37:10" (2/3) ... [2020-10-27 01:37:11,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b237cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:37:11, skipping insertion in model container [2020-10-27 01:37:11,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:37:11" (3/3) ... [2020-10-27 01:37:11,493 INFO L111 eAbstractionObserver]: Analyzing ICFG ofuf_5.c [2020-10-27 01:37:11,506 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:37:11,512 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:37:11,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:37:11,557 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:37:11,557 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:37:11,557 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:37:11,558 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:37:11,558 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:37:11,558 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:37:11,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:37:11,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:37:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states. [2020-10-27 01:37:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:37:11,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:11,594 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, 1, 1] [2020-10-27 01:37:11,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1381053259, now seen corresponding path program 1 times [2020-10-27 01:37:11,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:11,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674521647] [2020-10-27 01:37:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:12,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:12,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:13,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:16,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:16,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:37:16,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:37:16,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:37:16,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:37:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:37:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:37:16,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:37:17,220 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:37:17,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:17,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:17,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:17,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:17,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:17,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 01:37:17,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:17,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:17,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:17,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:17,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:17,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:37:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:17,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:17,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:17,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:17,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 01:37:17,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:37:17,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 01:37:17,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:37:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:37:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:37:17,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:37:17,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-27 01:37:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:17,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:17,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:17,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:37:17,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:17,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:37:17,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:17,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:17,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-27 01:37:17,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:17,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:17,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 01:37:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:17,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:17,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:17,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:37:17,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:37:17,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:37:17,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 01:37:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:17,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:37:17,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674521647] [2020-10-27 01:37:17,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:37:17,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:37:17,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570969361] [2020-10-27 01:37:17,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:37:17,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:17,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:37:17,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:37:17,522 INFO L87 Difference]: Start difference. First operand 133 states. Second operand 5 states. [2020-10-27 01:37:17,714 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:37:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:18,907 INFO L93 Difference]: Finished difference Result 258 states and 389 transitions. [2020-10-27 01:37:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:37:18,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-27 01:37:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:18,923 INFO L225 Difference]: With dead ends: 258 [2020-10-27 01:37:18,923 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:37:18,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:37:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:37:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-10-27 01:37:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:37:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2020-10-27 01:37:18,999 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 48 [2020-10-27 01:37:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:18,999 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2020-10-27 01:37:18,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:37:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2020-10-27 01:37:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:37:19,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:19,004 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] [2020-10-27 01:37:19,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:37:19,004 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:19,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:19,005 INFO L82 PathProgramCache]: Analyzing trace with hash 986748339, now seen corresponding path program 1 times [2020-10-27 01:37:19,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:19,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773023885] [2020-10-27 01:37:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:19,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:19,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:19,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:19,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:19,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:24,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:24,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:37:24,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:37:24,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 01:37:24,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:24,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:37:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:37:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:37:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:37:24,411 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:37:24,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:24,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:24,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:24,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:24,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 01:37:24,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:24,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:37:24,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:24,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:37:24,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:37:24,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:37:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:24,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:24,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:24,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:24,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 01:37:24,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:37:24,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-27 01:37:24,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:24,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:37:24,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:37:24,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:37:24,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:24,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 01:37:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:24,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:24,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:24,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:37:24,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:24,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 01:37:24,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:24,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:37:24,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:24,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:37:24,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:24,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-27 01:37:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:24,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:24,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:37:24,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:24,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:37:24,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:24,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:37:24,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:37:24,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:37:24,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:24,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773023885] [2020-10-27 01:37:24,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:37:24,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-27 01:37:24,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154791202] [2020-10-27 01:37:24,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:37:24,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:37:24,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:37:24,875 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand 16 states. [2020-10-27 01:37:25,110 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:37:25,474 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 01:37:26,029 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:37:26,422 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 01:37:26,917 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:37:27,230 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 01:37:27,613 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 01:37:28,021 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:37:28,503 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 01:37:28,794 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:37:29,173 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 01:37:29,480 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:37:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:30,724 INFO L93 Difference]: Finished difference Result 172 states and 235 transitions. [2020-10-27 01:37:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:37:30,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-27 01:37:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:30,728 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:37:30,729 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 01:37:30,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:37:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 01:37:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2020-10-27 01:37:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 01:37:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 206 transitions. [2020-10-27 01:37:30,789 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 206 transitions. Word has length 45 [2020-10-27 01:37:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:30,790 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 206 transitions. [2020-10-27 01:37:30,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:37:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 206 transitions. [2020-10-27 01:37:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:37:30,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:30,801 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] [2020-10-27 01:37:30,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:37:30,801 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:30,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:30,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1038579239, now seen corresponding path program 1 times [2020-10-27 01:37:30,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:30,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155333499] [2020-10-27 01:37:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:30,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:30,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:30,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:31,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:35,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:35,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:37:35,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:37:35,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 01:37:35,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:37:35,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:37:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:37:35,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:36,113 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:37:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:36,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:36,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:36,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:36,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 01:37:36,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:37:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:36,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:37:36,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:36,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:37:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:36,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:36,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 01:37:36,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:37:36,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 01:37:36,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:37:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:37:36,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:37:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:37:36,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 01:37:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:36,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:36,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 01:37:36,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:37:36,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 01:37:36,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:36,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:37:36,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:37:36,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:37:36,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:36,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 01:37:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:36,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:36,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:36,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:37:36,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:36,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:37:36,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:36,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:37:36,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:37:36,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:37:36,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:36,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155333499] [2020-10-27 01:37:36,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:37:36,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 01:37:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136730280] [2020-10-27 01:37:36,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:37:36,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:37:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:37:36,455 INFO L87 Difference]: Start difference. First operand 148 states and 206 transitions. Second operand 11 states. [2020-10-27 01:37:36,656 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:37:36,985 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 01:37:37,502 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:37:37,787 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:37:38,196 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 01:37:38,549 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 01:37:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:41,830 INFO L93 Difference]: Finished difference Result 196 states and 270 transitions. [2020-10-27 01:37:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:37:41,831 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-27 01:37:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:41,834 INFO L225 Difference]: With dead ends: 196 [2020-10-27 01:37:41,834 INFO L226 Difference]: Without dead ends: 155 [2020-10-27 01:37:41,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:37:41,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-27 01:37:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2020-10-27 01:37:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 01:37:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2020-10-27 01:37:41,886 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 46 [2020-10-27 01:37:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:41,888 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2020-10-27 01:37:41,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:37:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2020-10-27 01:37:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:37:41,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:41,892 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, 1, 1, 1] [2020-10-27 01:37:41,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:37:41,893 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1290067361, now seen corresponding path program 1 times [2020-10-27 01:37:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:41,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109290601] [2020-10-27 01:37:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:41,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:41,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:42,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:42,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:44,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:46,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:46,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:37:46,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:37:46,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:37:46,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:37:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:37:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:37:46,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:47,311 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:37:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:37:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:47,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:47,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:37:47,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:47,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 01:37:47,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:37:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:37:47,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:47,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:37:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:47,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:47,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 01:37:47,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:37:47,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 01:37:47,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:47,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:37:47,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:37:47,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:37:47,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:37:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:47,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:37:47,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:47,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 01:37:47,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:47,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:37:47,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:37:47,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:37:47,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:37:47,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 01:37:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:47,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:47,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:37:47,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:37:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:37:47,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:37:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:37:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:37:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:37:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:37:47,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109290601] [2020-10-27 01:37:47,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:37:47,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:37:47,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84990566] [2020-10-27 01:37:47,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:37:47,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:37:47,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:37:47,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:37:47,704 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand 18 states. [2020-10-27 01:37:47,906 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:37:48,281 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 01:37:48,927 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:37:49,312 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 01:37:49,767 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 01:37:49,991 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:37:50,342 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 01:37:50,723 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:37:51,129 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 01:37:51,553 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:37:51,995 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 01:37:52,280 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 01:37:52,796 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 01:37:53,485 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 01:37:53,986 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:37:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:37:54,710 INFO L93 Difference]: Finished difference Result 214 states and 290 transitions. [2020-10-27 01:37:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:37:54,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-27 01:37:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:37:54,716 INFO L225 Difference]: With dead ends: 214 [2020-10-27 01:37:54,716 INFO L226 Difference]: Without dead ends: 175 [2020-10-27 01:37:54,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:37:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-27 01:37:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 164. [2020-10-27 01:37:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 01:37:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2020-10-27 01:37:54,750 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 49 [2020-10-27 01:37:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:37:54,750 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2020-10-27 01:37:54,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:37:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2020-10-27 01:37:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:37:54,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:37:54,753 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, 1, 1, 1, 1] [2020-10-27 01:37:54,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:37:54,753 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:37:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:37:54,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1263044341, now seen corresponding path program 2 times [2020-10-27 01:37:54,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:37:54,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342945747] [2020-10-27 01:37:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:37:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:37:54,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:54,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:54,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:54,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:55,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:55,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:56,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:37:59,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:37:59,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:37:59,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:37:59,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 01:37:59,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:37:59,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:37:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:37:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:37:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:00,297 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:38:00,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:00,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:00,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:00,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:00,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 01:38:00,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:00,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:38:00,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:00,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:38:00,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:00,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:38:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:00,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:00,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 01:38:00,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:38:00,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 01:38:00,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:00,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:00,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:38:00,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:38:00,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:00,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 01:38:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:00,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:00,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:38:00,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:00,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 01:38:00,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:38:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:00,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:38:00,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:00,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 01:38:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:00,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:00,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:38:00,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:00,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 01:38:00,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:00,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:38:00,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:38:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:38:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:00,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342945747] [2020-10-27 01:38:00,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:00,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:38:00,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766940240] [2020-10-27 01:38:00,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:38:00,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:38:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:38:00,976 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand 21 states. [2020-10-27 01:38:01,180 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:38:01,726 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 01:38:02,533 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:38:02,937 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:38:03,483 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:38:03,812 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:38:04,090 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:38:04,531 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:38:04,946 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:38:05,292 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 01:38:05,800 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:38:06,171 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:38:06,579 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:38:06,988 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 01:38:07,428 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:38:07,927 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:38:08,343 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 01:38:09,157 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 01:38:09,697 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:38:10,291 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 01:38:10,822 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 01:38:11,271 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 01:38:11,584 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 01:38:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:14,875 INFO L93 Difference]: Finished difference Result 254 states and 349 transitions. [2020-10-27 01:38:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:38:14,876 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-27 01:38:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:14,879 INFO L225 Difference]: With dead ends: 254 [2020-10-27 01:38:14,879 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 01:38:14,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=342, Invalid=1728, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:38:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 01:38:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 181. [2020-10-27 01:38:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 01:38:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 253 transitions. [2020-10-27 01:38:14,917 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 253 transitions. Word has length 53 [2020-10-27 01:38:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:14,917 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 253 transitions. [2020-10-27 01:38:14,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:38:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 253 transitions. [2020-10-27 01:38:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:38:14,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:14,919 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, 1, 1, 1, 1, 1] [2020-10-27 01:38:14,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:38:14,920 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:14,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:14,920 INFO L82 PathProgramCache]: Analyzing trace with hash 797897601, now seen corresponding path program 1 times [2020-10-27 01:38:14,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:14,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43819260] [2020-10-27 01:38:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:14,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:15,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:15,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:15,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:15,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:18,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:19,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:19,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:38:19,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:38:19,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 01:38:19,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:19,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:38:19,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:38:19,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:38:19,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:20,546 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:38:20,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:20,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:20,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:20,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:20,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:20,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 01:38:20,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:20,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:38:20,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:20,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:38:20,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:20,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:38:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:20,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:20,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:20,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:20,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 01:38:20,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:38:20,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 01:38:20,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:20,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:20,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:38:20,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:38:20,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:20,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-27 01:38:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:21,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:21,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:38:21,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:21,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:38:21,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:38:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:21,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:38:21,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:21,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 01:38:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:21,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:21,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:21,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:38:21,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:21,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:38:21,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:21,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:38:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:38:21,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:21,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43819260] [2020-10-27 01:38:21,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:21,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:38:21,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864442859] [2020-10-27 01:38:21,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:38:21,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:38:21,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:38:21,177 INFO L87 Difference]: Start difference. First operand 181 states and 253 transitions. Second operand 20 states. [2020-10-27 01:38:21,381 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:38:21,849 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 01:38:22,751 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 01:38:23,180 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 01:38:23,691 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 01:38:24,132 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 01:38:24,486 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:38:24,874 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:38:25,504 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 01:38:25,835 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:38:26,307 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:38:26,643 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 01:38:27,228 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 01:38:28,064 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 01:38:28,658 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 01:38:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:29,482 INFO L93 Difference]: Finished difference Result 273 states and 375 transitions. [2020-10-27 01:38:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:38:29,484 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-27 01:38:29,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:29,487 INFO L225 Difference]: With dead ends: 273 [2020-10-27 01:38:29,487 INFO L226 Difference]: Without dead ends: 232 [2020-10-27 01:38:29,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:38:29,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-27 01:38:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 217. [2020-10-27 01:38:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 01:38:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 306 transitions. [2020-10-27 01:38:29,528 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 306 transitions. Word has length 51 [2020-10-27 01:38:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:29,528 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 306 transitions. [2020-10-27 01:38:29,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:38:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 306 transitions. [2020-10-27 01:38:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:38:29,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:29,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:29,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:38:29,533 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:29,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:29,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1886500907, now seen corresponding path program 1 times [2020-10-27 01:38:29,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:29,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803325105] [2020-10-27 01:38:29,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:29,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:29,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:30,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:34,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:34,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:38:34,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:38:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 01:38:34,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:38:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:38:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:38:34,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:34,922 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:38:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:34,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:34,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:34,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:34,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 01:38:34,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:38:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:34,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:38:34,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:35,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:38:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:35,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:35,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:35,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:35,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:35,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 01:38:35,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:38:35,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 01:38:35,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:38:35,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:38:35,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:35,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 01:38:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:35,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:35,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:35,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:38:35,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:35,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:38:35,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:35,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:38:35,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:35,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:38:35,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:35,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 01:38:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:35,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:35,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:35,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:38:35,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:35,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:38:35,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:35,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:38:35,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:38:35,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:35,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803325105] [2020-10-27 01:38:35,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:35,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:38:35,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394163778] [2020-10-27 01:38:35,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:38:35,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:38:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:38:35,406 INFO L87 Difference]: Start difference. First operand 217 states and 306 transitions. Second operand 18 states. [2020-10-27 01:38:35,624 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:38:36,039 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:38:36,756 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 01:38:37,105 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 01:38:37,605 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 01:38:37,905 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 01:38:38,241 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 01:38:38,624 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 01:38:39,172 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 01:38:39,466 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:38:40,021 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 01:38:40,639 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 01:38:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:38:41,564 INFO L93 Difference]: Finished difference Result 280 states and 391 transitions. [2020-10-27 01:38:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:38:41,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-27 01:38:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:38:41,569 INFO L225 Difference]: With dead ends: 280 [2020-10-27 01:38:41,569 INFO L226 Difference]: Without dead ends: 255 [2020-10-27 01:38:41,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:38:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-27 01:38:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 229. [2020-10-27 01:38:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 01:38:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 324 transitions. [2020-10-27 01:38:41,621 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 324 transitions. Word has length 47 [2020-10-27 01:38:41,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:38:41,621 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 324 transitions. [2020-10-27 01:38:41,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:38:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 324 transitions. [2020-10-27 01:38:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:38:41,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:38:41,624 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, 1, 1, 1, 1, 1, 1] [2020-10-27 01:38:41,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:38:41,624 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:38:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:38:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1119480109, now seen corresponding path program 2 times [2020-10-27 01:38:41,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:38:41,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452105628] [2020-10-27 01:38:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:38:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:41,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:41,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:42,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:43,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:46,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:46,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:38:46,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:38:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:38:46,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:38:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:38:46,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:38:46,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:47,329 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:38:47,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:38:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:47,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:47,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:38:47,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:47,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 01:38:47,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:47,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:38:47,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:47,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:38:47,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:47,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:38:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:47,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:47,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:47,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:47,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 01:38:47,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:38:47,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-27 01:38:47,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:47,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:38:47,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:38:47,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:38:47,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:47,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 01:38:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:47,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:47,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:47,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:38:47,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:38:47,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:38:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:38:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:38:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:47,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 01:38:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:38:48,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:38:48,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:38:48,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:38:48,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:38:48,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:38:48,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:38:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:38:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:38:48,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:38:48,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:38:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:38:48,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452105628] [2020-10-27 01:38:48,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:38:48,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:38:48,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799148940] [2020-10-27 01:38:48,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:38:48,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:38:48,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:38:48,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:38:48,125 INFO L87 Difference]: Start difference. First operand 229 states and 324 transitions. Second operand 23 states. [2020-10-27 01:38:48,343 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:38:48,895 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:38:49,963 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 01:38:50,462 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 01:38:51,069 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 01:38:51,472 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 01:38:51,962 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 01:38:52,339 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 01:38:52,774 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 01:38:53,339 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 01:38:53,729 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 01:38:54,127 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:38:54,547 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 01:38:55,006 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 01:38:55,546 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 01:38:56,103 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 01:38:56,565 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 01:38:57,468 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:38:58,161 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 01:38:58,924 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 01:38:59,523 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:39:00,022 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:39:00,387 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 01:39:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:04,932 INFO L93 Difference]: Finished difference Result 339 states and 477 transitions. [2020-10-27 01:39:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:39:04,935 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-27 01:39:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:04,940 INFO L225 Difference]: With dead ends: 339 [2020-10-27 01:39:04,940 INFO L226 Difference]: Without dead ends: 289 [2020-10-27 01:39:04,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=402, Invalid=1950, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:39:04,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-27 01:39:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 198. [2020-10-27 01:39:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 01:39:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 279 transitions. [2020-10-27 01:39:04,980 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 279 transitions. Word has length 55 [2020-10-27 01:39:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:04,980 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 279 transitions. [2020-10-27 01:39:04,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:39:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 279 transitions. [2020-10-27 01:39:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:39:04,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:04,982 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:04,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:39:04,983 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:04,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1203924632, now seen corresponding path program 1 times [2020-10-27 01:39:04,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:04,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488096410] [2020-10-27 01:39:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:05,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:05,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:08,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:10,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:10,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:39:10,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:39:10,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:39:10,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:39:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:39:10,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:39:10,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:10,230 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 17 [2020-10-27 01:39:10,776 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 26 [2020-10-27 01:39:11,325 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:39:11,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:11,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:11,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:11,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:11,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 01:39:11,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:11,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:39:11,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:11,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:39:11,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:11,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:39:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:11,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:11,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 01:39:11,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:11,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 01:39:11,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:39:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:39:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:39:11,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:11,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 01:39:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:11,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:11,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:39:11,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:11,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:39:11,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:11,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:39:11,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:11,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:39:11,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:11,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 01:39:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:11,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:11,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:11,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:11,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:11,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:39:11,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:11,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:39:11,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:39:11,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:39:11,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:11,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488096410] [2020-10-27 01:39:11,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:11,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:39:11,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664494620] [2020-10-27 01:39:11,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:39:11,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:39:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:39:11,767 INFO L87 Difference]: Start difference. First operand 198 states and 279 transitions. Second operand 20 states. [2020-10-27 01:39:11,967 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:39:12,487 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 01:39:13,796 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:39:14,100 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 01:39:14,558 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:39:15,224 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 01:39:15,567 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 01:39:15,965 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:39:16,489 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:39:17,134 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:39:17,462 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 01:39:17,771 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:39:18,913 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 01:39:19,227 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 01:39:19,820 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 01:39:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:20,837 INFO L93 Difference]: Finished difference Result 341 states and 477 transitions. [2020-10-27 01:39:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:39:20,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2020-10-27 01:39:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:20,844 INFO L225 Difference]: With dead ends: 341 [2020-10-27 01:39:20,844 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 01:39:20,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:39:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 01:39:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 236. [2020-10-27 01:39:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-27 01:39:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 335 transitions. [2020-10-27 01:39:20,887 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 335 transitions. Word has length 53 [2020-10-27 01:39:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:20,887 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 335 transitions. [2020-10-27 01:39:20,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:39:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 335 transitions. [2020-10-27 01:39:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:39:20,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:20,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:20,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:39:20,890 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:20,890 INFO L82 PathProgramCache]: Analyzing trace with hash -302979476, now seen corresponding path program 1 times [2020-10-27 01:39:20,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:20,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637847552] [2020-10-27 01:39:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:20,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:20,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:21,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:21,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:21,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:23,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:25,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:25,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:39:25,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:39:25,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 01:39:25,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:39:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:39:25,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:39:25,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:26,123 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2020-10-27 01:39:26,337 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-27 01:39:26,907 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:39:26,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:26,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:26,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:26,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:26,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:26,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 01:39:26,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:39:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:39:26,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:27,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:39:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:27,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:27,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 01:39:27,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:27,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-27 01:39:27,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:39:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:39:27,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:39:27,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:27,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 01:39:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:27,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:39:27,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:27,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:39:27,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:27,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:39:27,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:27,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:39:27,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:27,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-27 01:39:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:27,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:27,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:27,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:27,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:39:27,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:27,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:39:27,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:39:27,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:39:27,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:27,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637847552] [2020-10-27 01:39:27,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:27,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:39:27,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677785869] [2020-10-27 01:39:27,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:39:27,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:27,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:39:27,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:39:27,384 INFO L87 Difference]: Start difference. First operand 236 states and 335 transitions. Second operand 19 states. [2020-10-27 01:39:27,630 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:39:28,136 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 01:39:29,594 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 01:39:29,873 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:39:30,350 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 01:39:31,257 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:39:31,615 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 01:39:32,023 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 01:39:32,664 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 01:39:32,967 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 01:39:34,053 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 01:39:34,534 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:39:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:37,421 INFO L93 Difference]: Finished difference Result 269 states and 378 transitions. [2020-10-27 01:39:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:39:37,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-27 01:39:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:37,427 INFO L225 Difference]: With dead ends: 269 [2020-10-27 01:39:37,427 INFO L226 Difference]: Without dead ends: 257 [2020-10-27 01:39:37,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:39:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-27 01:39:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 233. [2020-10-27 01:39:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-27 01:39:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 330 transitions. [2020-10-27 01:39:37,467 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 330 transitions. Word has length 49 [2020-10-27 01:39:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:37,468 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 330 transitions. [2020-10-27 01:39:37,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:39:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 330 transitions. [2020-10-27 01:39:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:39:37,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:37,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:39:37,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:39:37,470 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:37,471 INFO L82 PathProgramCache]: Analyzing trace with hash 920266969, now seen corresponding path program 3 times [2020-10-27 01:39:37,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:37,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104238592] [2020-10-27 01:39:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:37,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:37,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:38,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:42,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 01:39:42,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:39:42,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:39:42,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:39:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 01:39:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:39:42,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:42,689 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:39:42,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:42,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:42,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:42,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:42,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:39:42,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:42,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:42,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:42,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:42,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:42,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:39:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:42,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:42,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 01:39:42,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:39:42,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 01:39:42,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:39:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:39:42,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:39:42,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:42,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-27 01:39:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:42,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:42,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:39:42,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:42,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-27 01:39:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:42,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:42,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-27 01:39:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:42,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:42,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:42,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:42,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:39:42,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:42,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:39:42,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 01:39:42,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:39:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 01:39:42,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104238592] [2020-10-27 01:39:42,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:42,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:39:42,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365976943] [2020-10-27 01:39:42,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:39:42,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:39:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:39:42,944 INFO L87 Difference]: Start difference. First operand 233 states and 330 transitions. Second operand 6 states. [2020-10-27 01:39:43,125 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:39:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:39:47,153 INFO L93 Difference]: Finished difference Result 388 states and 557 transitions. [2020-10-27 01:39:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:39:47,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-27 01:39:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:39:47,161 INFO L225 Difference]: With dead ends: 388 [2020-10-27 01:39:47,161 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 01:39:47,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:39:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 01:39:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 150. [2020-10-27 01:39:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-27 01:39:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 207 transitions. [2020-10-27 01:39:47,191 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 207 transitions. Word has length 59 [2020-10-27 01:39:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:39:47,191 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 207 transitions. [2020-10-27 01:39:47,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:39:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 207 transitions. [2020-10-27 01:39:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:39:47,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:39:47,194 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2020-10-27 01:39:47,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:39:47,194 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:39:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:39:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1507907791, now seen corresponding path program 4 times [2020-10-27 01:39:47,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:39:47,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201716458] [2020-10-27 01:39:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:39:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:47,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:48,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:52,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:52,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 01:39:52,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:39:52,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:39:52,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:39:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:39:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:39:52,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:52,416 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-10-27 01:39:53,141 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:39:53,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:39:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:53,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:39:53,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 01:39:53,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:39:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:39:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:53,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:39:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:53,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:53,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 01:39:53,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:39:53,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 01:39:53,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:53,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:39:53,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:39:53,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:39:53,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:53,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 01:39:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:53,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:53,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:39:53,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:53,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:39:53,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:53,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:39:53,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:39:53,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:39:53,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:54,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-27 01:39:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:39:54,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:39:54,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:39:54,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:39:54,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:39:54,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:39:54,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:39:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:39:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:39:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:39:54,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:39:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:39:54,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201716458] [2020-10-27 01:39:54,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:39:54,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:39:54,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540541013] [2020-10-27 01:39:54,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:39:54,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:39:54,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:39:54,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:39:54,477 INFO L87 Difference]: Start difference. First operand 150 states and 207 transitions. Second operand 24 states. [2020-10-27 01:39:54,726 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:39:55,357 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 01:39:56,889 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 01:39:57,510 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 01:39:58,350 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 01:39:58,982 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 01:39:59,312 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 01:39:59,986 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 01:40:00,672 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 01:40:01,061 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 01:40:01,756 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 01:40:02,250 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-27 01:40:02,777 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-27 01:40:03,331 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 01:40:04,098 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 01:40:04,762 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-27 01:40:05,322 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-27 01:40:06,445 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 01:40:07,301 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 01:40:08,245 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 01:40:08,690 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 01:40:09,305 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 01:40:09,950 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 01:40:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:16,532 INFO L93 Difference]: Finished difference Result 275 states and 384 transitions. [2020-10-27 01:40:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:40:16,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-27 01:40:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:16,538 INFO L225 Difference]: With dead ends: 275 [2020-10-27 01:40:16,538 INFO L226 Difference]: Without dead ends: 231 [2020-10-27 01:40:16,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=460, Invalid=2090, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:40:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-27 01:40:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 200. [2020-10-27 01:40:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 01:40:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 281 transitions. [2020-10-27 01:40:16,572 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 281 transitions. Word has length 57 [2020-10-27 01:40:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:16,573 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 281 transitions. [2020-10-27 01:40:16,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:40:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 281 transitions. [2020-10-27 01:40:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:40:16,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:16,575 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, 1, 1, 1, 1, 1] [2020-10-27 01:40:16,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:40:16,575 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:16,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1582498851, now seen corresponding path program 5 times [2020-10-27 01:40:16,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:16,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306535873] [2020-10-27 01:40:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:16,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:16,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:19,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:21,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:21,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:40:21,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:40:21,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 01:40:21,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:40:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:40:21,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:40:21,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,285 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:40:22,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:40:22,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:40:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 01:40:22,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:40:22,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 01:40:22,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:40:22,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:40:22,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:40:22,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 01:40:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:40:22,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:22,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:40:22,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:40:22,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:22,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:40:22,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 01:40:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:22,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:22,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:22,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:40:22,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:22,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:40:22,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:40:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:40:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:40:22,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:23,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306535873] [2020-10-27 01:40:23,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:23,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:40:23,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356519938] [2020-10-27 01:40:23,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:40:23,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:23,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:40:23,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:40:23,137 INFO L87 Difference]: Start difference. First operand 200 states and 281 transitions. Second operand 21 states. [2020-10-27 01:40:23,382 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:40:23,979 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 01:40:24,530 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-27 01:40:25,165 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:40:25,814 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 01:40:26,680 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 01:40:26,986 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:40:27,607 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 01:40:28,074 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 01:40:29,032 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 01:40:29,387 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 01:40:29,945 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 01:40:30,356 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-27 01:40:31,019 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 01:40:32,064 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 01:40:32,700 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-27 01:40:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:33,765 INFO L93 Difference]: Finished difference Result 255 states and 349 transitions. [2020-10-27 01:40:33,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:40:33,777 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-27 01:40:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:33,779 INFO L225 Difference]: With dead ends: 255 [2020-10-27 01:40:33,780 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 01:40:33,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:40:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 01:40:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 200. [2020-10-27 01:40:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-27 01:40:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 280 transitions. [2020-10-27 01:40:33,817 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 280 transitions. Word has length 53 [2020-10-27 01:40:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:33,818 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 280 transitions. [2020-10-27 01:40:33,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:40:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 280 transitions. [2020-10-27 01:40:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:40:33,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:33,819 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, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:33,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:40:33,820 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:33,820 INFO L82 PathProgramCache]: Analyzing trace with hash -329943995, now seen corresponding path program 6 times [2020-10-27 01:40:33,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:33,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635763935] [2020-10-27 01:40:33,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:33,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:37,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:38,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:38,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:40:38,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:40:38,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:40:38,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:40:38,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:40:38,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:40:38,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:39,451 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 01:40:39,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:39,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:39,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:39,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:39,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:39,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 01:40:39,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:39,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:40:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:40:39,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:39,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 01:40:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:39,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:39,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:39,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:39,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:39,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:40:39,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:40:39,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-27 01:40:39,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:39,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:40:39,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 01:40:39,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:40:39,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:40,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-27 01:40:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:40,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:40,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 01:40:40,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:40,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:40:40,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:40,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:40:40,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:40,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:40:40,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:40,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 01:40:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:40,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:40,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:40,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:40:40,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:40,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:40:40,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:40,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:40:40,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 01:40:40,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:40:40,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:40,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635763935] [2020-10-27 01:40:40,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:40:40,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:40:40,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811543042] [2020-10-27 01:40:40,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:40:40,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:40,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:40:40,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:40:40,643 INFO L87 Difference]: Start difference. First operand 200 states and 280 transitions. Second operand 22 states. [2020-10-27 01:40:40,882 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-27 01:40:41,452 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 142