/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:21:47,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:21:47,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:21:47,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:21:47,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:21:47,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:21:47,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:21:47,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:21:47,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:21:47,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:21:47,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:21:47,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:21:47,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:21:47,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:21:47,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:21:47,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:21:47,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:21:47,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:21:47,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:21:47,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:21:47,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:21:47,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:21:47,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:21:47,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:21:47,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:21:47,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:21:47,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:21:47,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:21:47,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:21:47,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:21:47,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:21:47,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:21:47,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:21:47,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:21:47,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:21:47,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:21:47,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:21:47,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:21:47,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:21:47,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:21:47,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:21:47,845 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:21:47,886 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:21:47,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:21:47,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:21:47,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:21:47,888 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:21:47,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:21:47,888 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:21:47,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:21:47,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:21:47,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:21:47,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:21:47,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:21:47,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:21:47,890 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:21:47,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:21:47,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:21:47,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:21:47,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:21:47,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:21:47,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:21:47,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:21:47,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:21:47,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:21:47,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:21:47,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:21:47,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:21:47,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:21:47,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:21:47,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:21:47,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:21:48,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:21:48,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:21:48,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:21:48,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:21:48,307 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:21:48,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-10-29 13:21:48,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6ee9108a/85e80f0fb6104a8cab69d710159e954c/FLAGe13f62b2d [2020-10-29 13:21:49,100 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:21:49,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-10-29 13:21:49,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6ee9108a/85e80f0fb6104a8cab69d710159e954c/FLAGe13f62b2d [2020-10-29 13:21:49,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f6ee9108a/85e80f0fb6104a8cab69d710159e954c [2020-10-29 13:21:49,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:21:49,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:21:49,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:21:49,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:21:49,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:21:49,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:21:49" (1/1) ... [2020-10-29 13:21:49,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a52b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:49, skipping insertion in model container [2020-10-29 13:21:49,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:21:49" (1/1) ... [2020-10-29 13:21:49,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:21:49,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:21:49,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:21:49,985 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:21:50,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:21:50,168 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:21:50,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50 WrapperNode [2020-10-29 13:21:50,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:21:50,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:21:50,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:21:50,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:21:50,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (1/1) ... [2020-10-29 13:21:50,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (1/1) ... [2020-10-29 13:21:50,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (1/1) ... [2020-10-29 13:21:50,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (1/1) ... [2020-10-29 13:21:50,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (1/1) ... [2020-10-29 13:21:50,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (1/1) ... [2020-10-29 13:21:50,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (1/1) ... [2020-10-29 13:21:50,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:21:50,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:21:50,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:21:50,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:21:50,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:21:50,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:21:50,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:21:50,358 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:21:50,358 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:21:50,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:21:50,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:21:50,359 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:21:50,360 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:21:50,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:21:50,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:21:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:21:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:21:50,361 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:21:50,362 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:21:50,362 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:21:50,363 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:21:50,363 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:21:50,363 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:21:50,363 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:21:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:21:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:21:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:21:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:21:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:21:50,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:21:50,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:21:50,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:21:50,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:21:50,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:21:50,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:21:51,936 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:21:51,937 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:21:51,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:21:51 BoogieIcfgContainer [2020-10-29 13:21:51,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:21:51,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:21:51,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:21:51,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:21:51,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:21:49" (1/3) ... [2020-10-29 13:21:51,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33884781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:21:51, skipping insertion in model container [2020-10-29 13:21:51,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:21:50" (2/3) ... [2020-10-29 13:21:51,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33884781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:21:51, skipping insertion in model container [2020-10-29 13:21:51,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:21:51" (3/3) ... [2020-10-29 13:21:51,957 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-10-29 13:21:51,968 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:21:51,973 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:21:51,986 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:21:52,018 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:21:52,018 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:21:52,019 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:21:52,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:21:52,019 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:21:52,019 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:21:52,019 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:21:52,019 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:21:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states. [2020-10-29 13:21:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-29 13:21:52,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:21:52,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:21:52,068 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:21:52,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:21:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1837561670, now seen corresponding path program 1 times [2020-10-29 13:21:52,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:21:52,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955288075] [2020-10-29 13:21:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:21:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:52,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:52,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:53,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:53,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:53,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:53,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:53,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:53,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:55,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:57,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:57,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-29 13:21:57,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:21:57,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 13:21:57,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:57,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:57,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:21:57,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 13:21:57,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 13:21:57,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 13:21:57,866 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:21:57,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:21:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:21:57,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:21:57,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:21:57,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:21:57,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:21:57,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:21:57,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:21:57,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:21:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:21:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:21:57,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:21:57,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:21:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:21:57,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955288075] [2020-10-29 13:21:57,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:21:57,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:21:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983499342] [2020-10-29 13:21:57,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:21:58,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:21:58,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:21:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:21:58,019 INFO L87 Difference]: Start difference. First operand 345 states. Second operand 4 states. [2020-10-29 13:21:58,335 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:22:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:00,414 INFO L93 Difference]: Finished difference Result 778 states and 1256 transitions. [2020-10-29 13:22:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:22:00,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-10-29 13:22:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:00,436 INFO L225 Difference]: With dead ends: 778 [2020-10-29 13:22:00,436 INFO L226 Difference]: Without dead ends: 570 [2020-10-29 13:22:00,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:22:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-29 13:22:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 551. [2020-10-29 13:22:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-29 13:22:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 888 transitions. [2020-10-29 13:22:00,551 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 888 transitions. Word has length 132 [2020-10-29 13:22:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:00,553 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 888 transitions. [2020-10-29 13:22:00,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:22:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 888 transitions. [2020-10-29 13:22:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-29 13:22:00,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:00,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:00,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:22:00,561 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:00,562 INFO L82 PathProgramCache]: Analyzing trace with hash 312144918, now seen corresponding path program 1 times [2020-10-29 13:22:00,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:00,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285073813] [2020-10-29 13:22:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:00,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:00,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:00,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:01,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:01,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:02,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:02,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:05,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:05,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 13:22:05,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:22:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:22:05,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:05,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:22:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-29 13:22:05,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:22:05,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:22:05,930 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:22:05,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:05,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:05,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:05,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:05,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:05,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:22:05,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:05,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:05,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:05,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:22:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:06,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285073813] [2020-10-29 13:22:06,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:06,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:22:06,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355412683] [2020-10-29 13:22:06,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:22:06,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:22:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:22:06,012 INFO L87 Difference]: Start difference. First operand 551 states and 888 transitions. Second operand 4 states. [2020-10-29 13:22:06,242 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:22:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:07,958 INFO L93 Difference]: Finished difference Result 1421 states and 2272 transitions. [2020-10-29 13:22:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:22:07,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-10-29 13:22:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:07,967 INFO L225 Difference]: With dead ends: 1421 [2020-10-29 13:22:07,967 INFO L226 Difference]: Without dead ends: 1010 [2020-10-29 13:22:07,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:22:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-29 13:22:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 975. [2020-10-29 13:22:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2020-10-29 13:22:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1558 transitions. [2020-10-29 13:22:08,072 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1558 transitions. Word has length 134 [2020-10-29 13:22:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:08,073 INFO L481 AbstractCegarLoop]: Abstraction has 975 states and 1558 transitions. [2020-10-29 13:22:08,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:22:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1558 transitions. [2020-10-29 13:22:08,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-29 13:22:08,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:08,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:08,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:22:08,078 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:08,078 INFO L82 PathProgramCache]: Analyzing trace with hash -761651646, now seen corresponding path program 1 times [2020-10-29 13:22:08,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:08,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125932563] [2020-10-29 13:22:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:08,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:08,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:08,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:08,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:08,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:08,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:08,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:08,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:09,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:12,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:13,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:13,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-29 13:22:13,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:22:13,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:22:13,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:13,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:13,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:22:13,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-29 13:22:13,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:22:13,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:13,394 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:22:13,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:13,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:13,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:13,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:13,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:22:13,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:13,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:13,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:13,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:13,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:13,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:13,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125932563] [2020-10-29 13:22:13,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:13,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:22:13,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177843705] [2020-10-29 13:22:13,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:22:13,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:13,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:22:13,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:22:13,467 INFO L87 Difference]: Start difference. First operand 975 states and 1558 transitions. Second operand 4 states. [2020-10-29 13:22:13,731 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:22:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:15,762 INFO L93 Difference]: Finished difference Result 2477 states and 3934 transitions. [2020-10-29 13:22:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:22:15,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-10-29 13:22:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:15,774 INFO L225 Difference]: With dead ends: 2477 [2020-10-29 13:22:15,774 INFO L226 Difference]: Without dead ends: 1786 [2020-10-29 13:22:15,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:22:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2020-10-29 13:22:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1719. [2020-10-29 13:22:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1719 states. [2020-10-29 13:22:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2722 transitions. [2020-10-29 13:22:15,892 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2722 transitions. Word has length 136 [2020-10-29 13:22:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:15,892 INFO L481 AbstractCegarLoop]: Abstraction has 1719 states and 2722 transitions. [2020-10-29 13:22:15,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:22:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2722 transitions. [2020-10-29 13:22:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-29 13:22:15,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:15,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:15,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:22:15,900 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:15,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1634254418, now seen corresponding path program 1 times [2020-10-29 13:22:15,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:15,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155626553] [2020-10-29 13:22:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:15,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:15,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:16,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:16,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:16,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:16,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:16,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:17,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:17,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:20,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-29 13:22:20,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:22:20,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:22:20,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:20,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:22:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 13:22:20,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:22:20,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:21,252 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:22:21,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:21,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:21,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:21,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:21,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:22:21,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:21,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:21,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:21,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:21,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:21,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:22:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:21,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155626553] [2020-10-29 13:22:21,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:21,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:22:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708333394] [2020-10-29 13:22:21,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:22:21,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:22:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:22:21,356 INFO L87 Difference]: Start difference. First operand 1719 states and 2722 transitions. Second operand 4 states. [2020-10-29 13:22:21,652 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:22:23,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:23,403 INFO L93 Difference]: Finished difference Result 4561 states and 7182 transitions. [2020-10-29 13:22:23,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:22:23,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2020-10-29 13:22:23,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:23,424 INFO L225 Difference]: With dead ends: 4561 [2020-10-29 13:22:23,424 INFO L226 Difference]: Without dead ends: 3230 [2020-10-29 13:22:23,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:22:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3230 states. [2020-10-29 13:22:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3230 to 3099. [2020-10-29 13:22:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3099 states. [2020-10-29 13:22:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 4858 transitions. [2020-10-29 13:22:23,630 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 4858 transitions. Word has length 138 [2020-10-29 13:22:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:23,631 INFO L481 AbstractCegarLoop]: Abstraction has 3099 states and 4858 transitions. [2020-10-29 13:22:23,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:22:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 4858 transitions. [2020-10-29 13:22:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-29 13:22:23,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:23,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:23,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:22:23,642 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:23,643 INFO L82 PathProgramCache]: Analyzing trace with hash -249024707, now seen corresponding path program 1 times [2020-10-29 13:22:23,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:23,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312713850] [2020-10-29 13:22:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:23,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:23,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:23,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:23,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:23,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:24,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:24,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:24,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:28,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:28,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-29 13:22:28,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:22:28,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:22:28,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:28,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:28,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:22:28,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-29 13:22:28,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:22:28,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:28,913 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:22:28,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:28,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:28,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:28,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:28,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:22:28,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:28,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:28,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:22:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312713850] [2020-10-29 13:22:28,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:28,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:22:28,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655147999] [2020-10-29 13:22:28,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:22:28,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:28,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:22:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:22:28,999 INFO L87 Difference]: Start difference. First operand 3099 states and 4858 transitions. Second operand 4 states. [2020-10-29 13:22:29,219 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:22:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:31,228 INFO L93 Difference]: Finished difference Result 7921 states and 12370 transitions. [2020-10-29 13:22:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:22:31,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-10-29 13:22:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:31,262 INFO L225 Difference]: With dead ends: 7921 [2020-10-29 13:22:31,262 INFO L226 Difference]: Without dead ends: 5814 [2020-10-29 13:22:31,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:22:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5814 states. [2020-10-29 13:22:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5814 to 5811. [2020-10-29 13:22:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5811 states. [2020-10-29 13:22:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 9054 transitions. [2020-10-29 13:22:31,622 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 9054 transitions. Word has length 140 [2020-10-29 13:22:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:31,623 INFO L481 AbstractCegarLoop]: Abstraction has 5811 states and 9054 transitions. [2020-10-29 13:22:31,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:22:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 9054 transitions. [2020-10-29 13:22:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-29 13:22:31,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:31,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:31,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:22:31,642 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:31,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:31,643 INFO L82 PathProgramCache]: Analyzing trace with hash 829886370, now seen corresponding path program 1 times [2020-10-29 13:22:31,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:31,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779112630] [2020-10-29 13:22:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:31,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:31,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:31,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:31,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:31,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:31,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:31,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:36,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:36,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-29 13:22:36,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:22:36,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:22:36,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:36,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:36,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:22:36,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:22:36,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 13:22:36,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:37,242 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:22:37,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:37,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:37,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:37,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:37,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:37,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:22:37,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:37,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:37,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:37,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779112630] [2020-10-29 13:22:37,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:37,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:22:37,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780906065] [2020-10-29 13:22:37,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:22:37,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:37,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:22:37,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:22:37,313 INFO L87 Difference]: Start difference. First operand 5811 states and 9054 transitions. Second operand 9 states. [2020-10-29 13:22:37,611 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:22:45,158 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:22:45,391 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:22:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:45,573 INFO L93 Difference]: Finished difference Result 24403 states and 37775 transitions. [2020-10-29 13:22:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 13:22:45,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 140 [2020-10-29 13:22:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:45,663 INFO L225 Difference]: With dead ends: 24403 [2020-10-29 13:22:45,663 INFO L226 Difference]: Without dead ends: 22224 [2020-10-29 13:22:45,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:22:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22224 states. [2020-10-29 13:22:46,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22224 to 6349. [2020-10-29 13:22:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6349 states. [2020-10-29 13:22:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6349 states to 6349 states and 9880 transitions. [2020-10-29 13:22:46,539 INFO L78 Accepts]: Start accepts. Automaton has 6349 states and 9880 transitions. Word has length 140 [2020-10-29 13:22:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:46,539 INFO L481 AbstractCegarLoop]: Abstraction has 6349 states and 9880 transitions. [2020-10-29 13:22:46,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:22:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 6349 states and 9880 transitions. [2020-10-29 13:22:46,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-29 13:22:46,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:46,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:46,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:22:46,560 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2006890664, now seen corresponding path program 1 times [2020-10-29 13:22:46,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:46,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92615100] [2020-10-29 13:22:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:46,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:46,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:46,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:46,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:51,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:51,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:51,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-29 13:22:51,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:22:51,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:22:51,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:51,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:51,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:22:51,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-29 13:22:51,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 13:22:51,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:51,895 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:22:51,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:22:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:51,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:22:51,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:22:51,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:22:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:22:51,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:22:51,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:22:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:22:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:22:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:22:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:22:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:22:51,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92615100] [2020-10-29 13:22:51,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:22:51,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:22:51,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849483735] [2020-10-29 13:22:51,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:22:51,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:22:51,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:22:51,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:22:51,952 INFO L87 Difference]: Start difference. First operand 6349 states and 9880 transitions. Second operand 4 states. [2020-10-29 13:22:54,524 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:22:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:22:54,544 INFO L93 Difference]: Finished difference Result 17663 states and 27434 transitions. [2020-10-29 13:22:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:22:54,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2020-10-29 13:22:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:22:54,572 INFO L225 Difference]: With dead ends: 17663 [2020-10-29 13:22:54,572 INFO L226 Difference]: Without dead ends: 12120 [2020-10-29 13:22:54,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:22:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12120 states. [2020-10-29 13:22:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12120 to 11325. [2020-10-29 13:22:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11325 states. [2020-10-29 13:22:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 17426 transitions. [2020-10-29 13:22:55,347 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 17426 transitions. Word has length 140 [2020-10-29 13:22:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:22:55,347 INFO L481 AbstractCegarLoop]: Abstraction has 11325 states and 17426 transitions. [2020-10-29 13:22:55,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:22:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 17426 transitions. [2020-10-29 13:22:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-29 13:22:55,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:22:55,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:22:55,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:22:55,371 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:22:55,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:22:55,372 INFO L82 PathProgramCache]: Analyzing trace with hash 559436038, now seen corresponding path program 1 times [2020-10-29 13:22:55,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:22:55,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008972726] [2020-10-29 13:22:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:22:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:22:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:55,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:55,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:22:56,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:00,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:00,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-29 13:23:00,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:23:00,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:23:00,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:00,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:00,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:23:00,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 13:23:00,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:23:00,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:00,658 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:23:00,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:00,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:00,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:00,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:23:00,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:23:00,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:23:00,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:00,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:23:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:23:00,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:23:00,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:23:00,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008972726] [2020-10-29 13:23:00,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:23:00,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:23:00,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54081912] [2020-10-29 13:23:00,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:23:00,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:23:00,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:23:00,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:23:00,707 INFO L87 Difference]: Start difference. First operand 11325 states and 17426 transitions. Second operand 5 states. [2020-10-29 13:23:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:23:02,704 INFO L93 Difference]: Finished difference Result 21664 states and 33184 transitions. [2020-10-29 13:23:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:23:02,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-10-29 13:23:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:23:02,732 INFO L225 Difference]: With dead ends: 21664 [2020-10-29 13:23:02,732 INFO L226 Difference]: Without dead ends: 11325 [2020-10-29 13:23:02,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:23:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11325 states. [2020-10-29 13:23:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11325 to 11325. [2020-10-29 13:23:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11325 states. [2020-10-29 13:23:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 17234 transitions. [2020-10-29 13:23:03,512 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 17234 transitions. Word has length 142 [2020-10-29 13:23:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:23:03,513 INFO L481 AbstractCegarLoop]: Abstraction has 11325 states and 17234 transitions. [2020-10-29 13:23:03,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:23:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 17234 transitions. [2020-10-29 13:23:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-29 13:23:03,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:23:03,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:23:03,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:23:03,535 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:23:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:23:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1306543671, now seen corresponding path program 1 times [2020-10-29 13:23:03,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:23:03,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409468055] [2020-10-29 13:23:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:23:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:03,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:03,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:03,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:03,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:03,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:04,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:04,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:04,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:08,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:08,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-29 13:23:08,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:23:08,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:23:08,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:08,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:08,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:23:08,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 13:23:08,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 13:23:08,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:08,814 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:23:08,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:08,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:08,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:08,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:23:08,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:23:08,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:23:08,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:08,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:08,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:23:08,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:23:08,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:23:08,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:23:08,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409468055] [2020-10-29 13:23:08,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:23:08,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:23:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523497376] [2020-10-29 13:23:08,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:23:08,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:23:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:23:08,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:23:08,887 INFO L87 Difference]: Start difference. First operand 11325 states and 17234 transitions. Second operand 4 states. [2020-10-29 13:23:09,171 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:23:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:23:12,442 INFO L93 Difference]: Finished difference Result 27463 states and 41335 transitions. [2020-10-29 13:23:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:23:12,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-10-29 13:23:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:23:12,484 INFO L225 Difference]: With dead ends: 27463 [2020-10-29 13:23:12,485 INFO L226 Difference]: Without dead ends: 19748 [2020-10-29 13:23:12,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:23:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19748 states. [2020-10-29 13:23:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19748 to 19745. [2020-10-29 13:23:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19745 states. [2020-10-29 13:23:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19745 states to 19745 states and 29335 transitions. [2020-10-29 13:23:14,042 INFO L78 Accepts]: Start accepts. Automaton has 19745 states and 29335 transitions. Word has length 144 [2020-10-29 13:23:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:23:14,042 INFO L481 AbstractCegarLoop]: Abstraction has 19745 states and 29335 transitions. [2020-10-29 13:23:14,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:23:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 19745 states and 29335 transitions. [2020-10-29 13:23:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-29 13:23:14,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:23:14,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:23:14,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:23:14,076 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:23:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:23:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1259841937, now seen corresponding path program 1 times [2020-10-29 13:23:14,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:23:14,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982263711] [2020-10-29 13:23:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:23:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:14,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:14,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:14,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:14,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:14,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:15,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:19,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:19,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-29 13:23:19,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:23:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:23:19,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:19,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:23:19,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:23:19,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:23:19,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:19,349 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:23:19,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:19,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:19,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:19,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:23:19,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:23:19,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:23:19,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:19,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:19,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:23:19,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:23:19,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:23:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:23:19,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982263711] [2020-10-29 13:23:19,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:23:19,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:23:19,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554198732] [2020-10-29 13:23:19,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:23:19,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:23:19,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:23:19,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:23:19,403 INFO L87 Difference]: Start difference. First operand 19745 states and 29335 transitions. Second operand 6 states. [2020-10-29 13:23:24,332 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:23:24,570 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:23:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:23:24,612 INFO L93 Difference]: Finished difference Result 54416 states and 80842 transitions. [2020-10-29 13:23:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:23:24,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2020-10-29 13:23:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:23:24,673 INFO L225 Difference]: With dead ends: 54416 [2020-10-29 13:23:24,673 INFO L226 Difference]: Without dead ends: 36133 [2020-10-29 13:23:24,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:23:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36133 states. [2020-10-29 13:23:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36133 to 19525. [2020-10-29 13:23:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19525 states. [2020-10-29 13:23:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19525 states to 19525 states and 28687 transitions. [2020-10-29 13:23:26,724 INFO L78 Accepts]: Start accepts. Automaton has 19525 states and 28687 transitions. Word has length 146 [2020-10-29 13:23:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:23:26,724 INFO L481 AbstractCegarLoop]: Abstraction has 19525 states and 28687 transitions. [2020-10-29 13:23:26,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:23:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 19525 states and 28687 transitions. [2020-10-29 13:23:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-29 13:23:26,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:23:26,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:23:26,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:23:26,752 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:23:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:23:26,753 INFO L82 PathProgramCache]: Analyzing trace with hash -172357885, now seen corresponding path program 1 times [2020-10-29 13:23:26,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:23:26,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784308926] [2020-10-29 13:23:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:23:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:26,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:26,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:26,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:26,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:26,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:27,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:27,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:27,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:27,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:27,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:31,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:31,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-29 13:23:31,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:23:31,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:23:31,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:31,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:31,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:23:31,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:23:31,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:23:31,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:31,983 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 15 [2020-10-29 13:23:32,224 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:23:32,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:23:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:23:32,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:23:32,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:23:32,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:23:32,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:23:32,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:23:32,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:23:32,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:23:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:23:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:23:32,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:23:32,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:23:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:23:32,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784308926] [2020-10-29 13:23:32,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:23:32,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-29 13:23:32,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232190562] [2020-10-29 13:23:32,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:23:32,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:23:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:23:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:23:32,272 INFO L87 Difference]: Start difference. First operand 19525 states and 28687 transitions. Second operand 10 states. [2020-10-29 13:23:32,508 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-29 13:23:50,956 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-29 13:23:51,208 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:23:51,720 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:23:51,943 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:23:52,217 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-29 13:23:52,543 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:23:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:23:52,600 INFO L93 Difference]: Finished difference Result 161329 states and 236830 transitions. [2020-10-29 13:23:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 13:23:52,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 147 [2020-10-29 13:23:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:23:52,805 INFO L225 Difference]: With dead ends: 161329 [2020-10-29 13:23:52,806 INFO L226 Difference]: Without dead ends: 142480 [2020-10-29 13:23:52,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 13:23:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142480 states. [2020-10-29 13:24:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142480 to 72932. [2020-10-29 13:24:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72932 states. [2020-10-29 13:24:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72932 states to 72932 states and 106437 transitions. [2020-10-29 13:24:00,309 INFO L78 Accepts]: Start accepts. Automaton has 72932 states and 106437 transitions. Word has length 147 [2020-10-29 13:24:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:00,309 INFO L481 AbstractCegarLoop]: Abstraction has 72932 states and 106437 transitions. [2020-10-29 13:24:00,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:24:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 72932 states and 106437 transitions. [2020-10-29 13:24:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-29 13:24:00,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:00,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:24:00,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:24:00,419 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:00,419 INFO L82 PathProgramCache]: Analyzing trace with hash 332855437, now seen corresponding path program 1 times [2020-10-29 13:24:00,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:00,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228126054] [2020-10-29 13:24:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:00,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:00,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:00,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:01,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:01,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:01,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:01,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:05,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:05,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:05,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-29 13:24:05,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:24:05,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-29 13:24:05,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:05,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:24:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:24:05,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:24:05,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:05,747 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:24:05,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:05,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:05,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:05,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:05,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:05,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:24:05,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:05,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:05,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:05,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228126054] [2020-10-29 13:24:05,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:05,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:24:05,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958787088] [2020-10-29 13:24:05,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:24:05,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:05,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:24:05,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:24:05,787 INFO L87 Difference]: Start difference. First operand 72932 states and 106437 transitions. Second operand 4 states. [2020-10-29 13:24:15,604 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:24:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:15,791 INFO L93 Difference]: Finished difference Result 129236 states and 189721 transitions. [2020-10-29 13:24:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:24:15,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-10-29 13:24:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:15,951 INFO L225 Difference]: With dead ends: 129236 [2020-10-29 13:24:15,952 INFO L226 Difference]: Without dead ends: 104317 [2020-10-29 13:24:15,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:24:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104317 states. [2020-10-29 13:24:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104317 to 81096. [2020-10-29 13:24:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81096 states. [2020-10-29 13:24:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81096 states to 81096 states and 119019 transitions. [2020-10-29 13:24:23,813 INFO L78 Accepts]: Start accepts. Automaton has 81096 states and 119019 transitions. Word has length 147 [2020-10-29 13:24:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:23,813 INFO L481 AbstractCegarLoop]: Abstraction has 81096 states and 119019 transitions. [2020-10-29 13:24:23,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:24:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 81096 states and 119019 transitions. [2020-10-29 13:24:23,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-29 13:24:23,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:23,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:24:23,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:24:23,895 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash -409755379, now seen corresponding path program 1 times [2020-10-29 13:24:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:23,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196916698] [2020-10-29 13:24:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:23,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:23,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:23,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:24,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:24,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:24,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:26,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:26,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:28,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:28,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-29 13:24:28,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:24:28,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 13:24:28,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:28,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:24:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:24:28,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:24:28,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:29,211 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:24:29,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:24:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:29,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:29,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:24:29,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:24:29,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:24:29,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:24:29,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:24:29,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:24:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:24:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:24:29,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:24:29,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:24:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:24:29,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196916698] [2020-10-29 13:24:29,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:24:29,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:24:29,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37291225] [2020-10-29 13:24:29,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:24:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:24:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:24:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:24:29,262 INFO L87 Difference]: Start difference. First operand 81096 states and 119019 transitions. Second operand 6 states. [2020-10-29 13:24:46,437 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:24:46,750 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:24:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:24:47,163 INFO L93 Difference]: Finished difference Result 236525 states and 345808 transitions. [2020-10-29 13:24:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:24:47,163 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2020-10-29 13:24:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:24:47,407 INFO L225 Difference]: With dead ends: 236525 [2020-10-29 13:24:47,407 INFO L226 Difference]: Without dead ends: 157405 [2020-10-29 13:24:47,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:24:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157405 states. [2020-10-29 13:24:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157405 to 81600. [2020-10-29 13:24:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81600 states. [2020-10-29 13:24:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81600 states to 81600 states and 118619 transitions. [2020-10-29 13:24:56,195 INFO L78 Accepts]: Start accepts. Automaton has 81600 states and 118619 transitions. Word has length 147 [2020-10-29 13:24:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:24:56,195 INFO L481 AbstractCegarLoop]: Abstraction has 81600 states and 118619 transitions. [2020-10-29 13:24:56,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:24:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 81600 states and 118619 transitions. [2020-10-29 13:24:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-29 13:24:56,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:24:56,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:24:56,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:24:56,286 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:24:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:24:56,287 INFO L82 PathProgramCache]: Analyzing trace with hash 588446907, now seen corresponding path program 1 times [2020-10-29 13:24:56,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:24:56,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409953529] [2020-10-29 13:24:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:24:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:24:56,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:56,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:57,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:24:57,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-29 13:25:01,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:25:01,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 13:25:01,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:01,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:25:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:25:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 13:25:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:01,553 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 25 [2020-10-29 13:25:01,790 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:25:01,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:25:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:25:01,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:25:01,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:25:01,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:25:01,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:25:01,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:25:01,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:25:01,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:25:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:25:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:25:01,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:25:01,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:25:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:25:01,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409953529] [2020-10-29 13:25:01,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:25:01,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:25:01,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101869400] [2020-10-29 13:25:01,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:25:01,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:25:01,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:25:01,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:25:01,879 INFO L87 Difference]: Start difference. First operand 81600 states and 118619 transitions. Second operand 9 states. [2020-10-29 13:25:02,173 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 181