/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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:09:32,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:09:32,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:09:32,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:09:32,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:09:32,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:09:32,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:09:32,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:09:32,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:09:32,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:09:32,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:09:32,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:09:32,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:09:32,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:09:32,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:09:32,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:09:32,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:09:32,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:09:32,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:09:32,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:09:32,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:09:32,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:09:32,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:09:32,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:09:32,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:09:32,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:09:32,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:09:32,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:09:32,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:09:32,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:09:32,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:09:32,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:09:32,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:09:32,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:09:32,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:09:32,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:09:32,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:09:32,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:09:32,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:09:32,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:09:32,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:09:32,934 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 13:09:32,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:09:32,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:09:32,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:09:33,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:09:33,000 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:09:33,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:09:33,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:09:33,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:09:33,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:09:33,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:09:33,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:09:33,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:09:33,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:09:33,004 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:09:33,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:09:33,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:09:33,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:09:33,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:09:33,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:09:33,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:09:33,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:09:33,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:09:33,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:09:33,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:09:33,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:09:33,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:09:33,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:09:33,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:09:33,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:09:33,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:09:33,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:09:33,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:09:33,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:09:33,430 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:09:33,430 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:09:33,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:09:33,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40b962d60/a478316207e3459b8604d5232cb20a3d/FLAG5db1d70b7 [2020-10-29 13:09:34,528 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:09:34,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:09:34,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40b962d60/a478316207e3459b8604d5232cb20a3d/FLAG5db1d70b7 [2020-10-29 13:09:35,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40b962d60/a478316207e3459b8604d5232cb20a3d [2020-10-29 13:09:35,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:09:35,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:09:35,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:09:35,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:09:35,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:09:35,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:09:35" (1/1) ... [2020-10-29 13:09:35,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dab0d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:35, skipping insertion in model container [2020-10-29 13:09:35,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:09:35" (1/1) ... [2020-10-29 13:09:35,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:09:35,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:09:36,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:09:36,772 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:09:37,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:09:37,749 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:09:37,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37 WrapperNode [2020-10-29 13:09:37,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:09:37,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:09:37,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:09:37,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:09:37,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (1/1) ... [2020-10-29 13:09:37,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (1/1) ... [2020-10-29 13:09:37,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (1/1) ... [2020-10-29 13:09:37,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (1/1) ... [2020-10-29 13:09:37,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (1/1) ... [2020-10-29 13:09:37,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (1/1) ... [2020-10-29 13:09:37,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (1/1) ... [2020-10-29 13:09:37,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:09:37,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:09:37,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:09:37,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:09:37,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (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 13:09:38,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:09:38,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:09:38,056 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:09:38,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:09:38,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:09:38,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:09:38,056 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:09:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:09:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:09:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:09:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:09:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:09:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:09:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:09:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:09:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:09:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:09:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:09:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:09:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:09:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:09:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:09:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:09:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:09:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:09:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:09:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:09:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:09:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:09:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:09:42,047 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:09:42,048 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:09:42,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:09:42 BoogieIcfgContainer [2020-10-29 13:09:42,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:09:42,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:09:42,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:09:42,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:09:42,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:09:35" (1/3) ... [2020-10-29 13:09:42,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da45314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:09:42, skipping insertion in model container [2020-10-29 13:09:42,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:09:37" (2/3) ... [2020-10-29 13:09:42,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da45314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:09:42, skipping insertion in model container [2020-10-29 13:09:42,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:09:42" (3/3) ... [2020-10-29 13:09:42,064 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:09:42,078 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:09:42,085 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:09:42,102 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:09:42,182 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:09:42,182 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:09:42,182 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:09:42,183 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:09:42,183 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:09:42,183 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:09:42,183 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:09:42,183 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:09:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states. [2020-10-29 13:09:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-10-29 13:09:42,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:09:42,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:09:42,282 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:09:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:09:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash 972701234, now seen corresponding path program 1 times [2020-10-29 13:09:42,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:09:42,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040211716] [2020-10-29 13:09:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:09:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:44,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:45,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:46,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:47,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:48,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:48,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:49,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:49,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 482 [2020-10-29 13:09:49,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:09:49,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-29 13:09:49,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:49,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:49,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:09:49,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:09:49,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 254 [2020-10-29 13:09:49,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:09:50,617 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:09:50,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:09:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:09:50,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:09:50,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:09:50,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:09:50,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:09:50,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-29 13:09:50,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:09:50,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:09:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:09:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:09:50,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:09:50,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:09:51,363 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 13:09:51,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040211716] [2020-10-29 13:09:51,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:09:51,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:09:51,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832315015] [2020-10-29 13:09:51,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:09:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:09:51,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:09:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:09:51,393 INFO L87 Difference]: Start difference. First operand 1397 states. Second operand 5 states. [2020-10-29 13:10:07,411 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 421 [2020-10-29 13:10:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:10:10,421 INFO L93 Difference]: Finished difference Result 4124 states and 7466 transitions. [2020-10-29 13:10:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:10:10,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 474 [2020-10-29 13:10:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:10:10,459 INFO L225 Difference]: With dead ends: 4124 [2020-10-29 13:10:10,459 INFO L226 Difference]: Without dead ends: 2738 [2020-10-29 13:10:10,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:10:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2020-10-29 13:10:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2707. [2020-10-29 13:10:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2707 states. [2020-10-29 13:10:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 4431 transitions. [2020-10-29 13:10:10,736 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 4431 transitions. Word has length 474 [2020-10-29 13:10:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:10:10,737 INFO L481 AbstractCegarLoop]: Abstraction has 2707 states and 4431 transitions. [2020-10-29 13:10:10,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:10:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 4431 transitions. [2020-10-29 13:10:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-10-29 13:10:10,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:10:10,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:10:10,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:10:10,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:10:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:10:10,755 INFO L82 PathProgramCache]: Analyzing trace with hash -837832773, now seen corresponding path program 1 times [2020-10-29 13:10:10,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:10:10,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116971470] [2020-10-29 13:10:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:10:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:11,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:11,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:12,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:12,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:13,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:13,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:13,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:15,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:16,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:16,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 484 [2020-10-29 13:10:16,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:10:16,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-29 13:10:16,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:16,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:10:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:10:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 250 [2020-10-29 13:10:16,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:10:17,387 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:10:17,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:10:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:17,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:17,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:17,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:10:17,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:10:17,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 13:10:17,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:17,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:17,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:10:17,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:10:17,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:10:17,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:10:18,022 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 13:10:18,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116971470] [2020-10-29 13:10:18,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:10:18,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:10:18,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370764017] [2020-10-29 13:10:18,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:10:18,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:10:18,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:10:18,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:10:18,027 INFO L87 Difference]: Start difference. First operand 2707 states and 4431 transitions. Second operand 4 states. [2020-10-29 13:10:35,509 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 420 [2020-10-29 13:10:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:10:38,485 INFO L93 Difference]: Finished difference Result 7870 states and 12852 transitions. [2020-10-29 13:10:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:10:38,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-10-29 13:10:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:10:38,519 INFO L225 Difference]: With dead ends: 7870 [2020-10-29 13:10:38,519 INFO L226 Difference]: Without dead ends: 5326 [2020-10-29 13:10:38,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:10:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2020-10-29 13:10:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 5297. [2020-10-29 13:10:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5297 states. [2020-10-29 13:10:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5297 states to 5297 states and 8643 transitions. [2020-10-29 13:10:38,762 INFO L78 Accepts]: Start accepts. Automaton has 5297 states and 8643 transitions. Word has length 476 [2020-10-29 13:10:38,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:10:38,763 INFO L481 AbstractCegarLoop]: Abstraction has 5297 states and 8643 transitions. [2020-10-29 13:10:38,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:10:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5297 states and 8643 transitions. [2020-10-29 13:10:38,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-29 13:10:38,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:10:38,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:10:38,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:10:38,786 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:10:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:10:38,786 INFO L82 PathProgramCache]: Analyzing trace with hash 681302000, now seen corresponding path program 1 times [2020-10-29 13:10:38,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:10:38,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326293176] [2020-10-29 13:10:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:10:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:38,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:39,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:39,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:40,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:40,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:40,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:41,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:41,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:43,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:43,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:43,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:43,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-10-29 13:10:43,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:10:43,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-29 13:10:43,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:43,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:43,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:10:43,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:10:43,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 196 [2020-10-29 13:10:43,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:10:45,162 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:10:45,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:10:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:10:45,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:10:45,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:10:45,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:10:45,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:10:45,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 13:10:45,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:10:45,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:10:45,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:10:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:10:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:10:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:10:45,531 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 13:10:45,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326293176] [2020-10-29 13:10:45,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:10:45,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:10:45,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089224589] [2020-10-29 13:10:45,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:10:45,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:10:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:10:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:10:45,535 INFO L87 Difference]: Start difference. First operand 5297 states and 8643 transitions. Second operand 4 states. [2020-10-29 13:11:02,965 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification that was a NOOP. DAG size: 420 [2020-10-29 13:11:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:11:05,926 INFO L93 Difference]: Finished difference Result 15488 states and 25218 transitions. [2020-10-29 13:11:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:11:05,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-10-29 13:11:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:11:05,978 INFO L225 Difference]: With dead ends: 15488 [2020-10-29 13:11:05,979 INFO L226 Difference]: Without dead ends: 10410 [2020-10-29 13:11:05,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:11:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2020-10-29 13:11:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 10383. [2020-10-29 13:11:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10383 states. [2020-10-29 13:11:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10383 states to 10383 states and 16873 transitions. [2020-10-29 13:11:06,411 INFO L78 Accepts]: Start accepts. Automaton has 10383 states and 16873 transitions. Word has length 477 [2020-10-29 13:11:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:11:06,411 INFO L481 AbstractCegarLoop]: Abstraction has 10383 states and 16873 transitions. [2020-10-29 13:11:06,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:11:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 10383 states and 16873 transitions. [2020-10-29 13:11:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-29 13:11:06,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:11:06,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:11:06,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:11:06,443 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:11:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:11:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1047471051, now seen corresponding path program 1 times [2020-10-29 13:11:06,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:11:06,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328305094] [2020-10-29 13:11:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:11:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:11:06,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:06,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:06,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:06,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:07,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:07,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:08,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:08,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:08,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:08,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:09,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:11,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:11,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:11:11,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-10-29 13:11:11,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:11:11,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-29 13:11:11,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:11:11,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:11:11,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:11:11,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:11:11,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-29 13:11:11,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:11:12,654 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:11:12,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:11:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:11:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:12,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:11:12,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:11:12,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:11:12,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:11:12,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:11:12,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:11:12,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:11:12,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:11:12,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:11:12,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:11:13,039 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 13:11:13,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328305094] [2020-10-29 13:11:13,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:11:13,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:11:13,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466242837] [2020-10-29 13:11:13,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:11:13,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:11:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:11:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:11:13,042 INFO L87 Difference]: Start difference. First operand 10383 states and 16873 transitions. Second operand 5 states. [2020-10-29 13:11:27,592 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 421 [2020-10-29 13:11:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:11:30,500 INFO L93 Difference]: Finished difference Result 30487 states and 49444 transitions. [2020-10-29 13:11:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:11:30,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-10-29 13:11:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:11:30,571 INFO L225 Difference]: With dead ends: 30487 [2020-10-29 13:11:30,572 INFO L226 Difference]: Without dead ends: 20399 [2020-10-29 13:11:30,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:11:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20399 states. [2020-10-29 13:11:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20399 to 20159. [2020-10-29 13:11:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20159 states. [2020-10-29 13:11:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20159 states to 20159 states and 32554 transitions. [2020-10-29 13:11:31,422 INFO L78 Accepts]: Start accepts. Automaton has 20159 states and 32554 transitions. Word has length 477 [2020-10-29 13:11:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:11:31,422 INFO L481 AbstractCegarLoop]: Abstraction has 20159 states and 32554 transitions. [2020-10-29 13:11:31,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:11:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 20159 states and 32554 transitions. [2020-10-29 13:11:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-10-29 13:11:31,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:11:31,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:11:31,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:11:31,479 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:11:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:11:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2029002706, now seen corresponding path program 1 times [2020-10-29 13:11:31,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:11:31,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122837600] [2020-10-29 13:11:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:11:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:11:31,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:31,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:31,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:31,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:32,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:32,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:33,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:33,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:33,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:35,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:35,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:36,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:36,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:36,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:36,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:11:36,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 487 [2020-10-29 13:11:36,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:11:36,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-29 13:11:36,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:11:36,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:11:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:11:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 13:11:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 216 [2020-10-29 13:11:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:11:37,706 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:11:37,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:11:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:11:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:11:37,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:11:37,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:11:37,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:11:37,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:11:37,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:11:37,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:11:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:11:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:11:37,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:11:37,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:11:38,098 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 13:11:38,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122837600] [2020-10-29 13:11:38,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:11:38,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:11:38,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129369225] [2020-10-29 13:11:38,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:11:38,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:11:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:11:38,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:11:38,101 INFO L87 Difference]: Start difference. First operand 20159 states and 32554 transitions. Second operand 4 states. [2020-10-29 13:11:55,547 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification that was a NOOP. DAG size: 420 [2020-10-29 13:11:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:11:58,596 INFO L93 Difference]: Finished difference Result 58687 states and 94518 transitions. [2020-10-29 13:11:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:11:58,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-10-29 13:11:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:11:58,692 INFO L225 Difference]: With dead ends: 58687 [2020-10-29 13:11:58,693 INFO L226 Difference]: Without dead ends: 39455 [2020-10-29 13:11:58,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:11:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39455 states. [2020-10-29 13:12:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39455 to 39215. [2020-10-29 13:12:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39215 states. [2020-10-29 13:12:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39215 states to 39215 states and 62976 transitions. [2020-10-29 13:12:00,326 INFO L78 Accepts]: Start accepts. Automaton has 39215 states and 62976 transitions. Word has length 479 [2020-10-29 13:12:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:00,326 INFO L481 AbstractCegarLoop]: Abstraction has 39215 states and 62976 transitions. [2020-10-29 13:12:00,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:12:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 39215 states and 62976 transitions. [2020-10-29 13:12:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-29 13:12:00,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:00,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:00,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:12:00,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:00,399 INFO L82 PathProgramCache]: Analyzing trace with hash -567245096, now seen corresponding path program 1 times [2020-10-29 13:12:00,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:00,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31009343] [2020-10-29 13:12:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:00,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:00,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:00,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:00,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:01,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:01,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:01,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:02,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:02,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:02,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:02,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:03,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:05,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:05,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 488 [2020-10-29 13:12:05,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:12:05,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-29 13:12:05,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:05,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:05,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:12:05,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:12:05,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-29 13:12:05,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:06,667 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:12:06,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:06,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:06,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:06,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:06,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:06,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:12:06,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:06,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:06,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:06,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:07,011 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 13:12:07,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31009343] [2020-10-29 13:12:07,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:07,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:12:07,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029782795] [2020-10-29 13:12:07,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:12:07,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:12:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:12:07,015 INFO L87 Difference]: Start difference. First operand 39215 states and 62976 transitions. Second operand 5 states. [2020-10-29 13:12:24,786 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification that was a NOOP. DAG size: 421 [2020-10-29 13:12:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:12:28,783 INFO L93 Difference]: Finished difference Result 115406 states and 185019 transitions. [2020-10-29 13:12:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:12:28,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 480 [2020-10-29 13:12:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:12:28,956 INFO L225 Difference]: With dead ends: 115406 [2020-10-29 13:12:28,956 INFO L226 Difference]: Without dead ends: 77278 [2020-10-29 13:12:29,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:12:29,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77278 states. [2020-10-29 13:12:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77278 to 77070. [2020-10-29 13:12:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77070 states. [2020-10-29 13:12:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77070 states to 77070 states and 123129 transitions. [2020-10-29 13:12:33,060 INFO L78 Accepts]: Start accepts. Automaton has 77070 states and 123129 transitions. Word has length 480 [2020-10-29 13:12:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:12:33,061 INFO L481 AbstractCegarLoop]: Abstraction has 77070 states and 123129 transitions. [2020-10-29 13:12:33,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:12:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 77070 states and 123129 transitions. [2020-10-29 13:12:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-10-29 13:12:33,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:12:33,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:33,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:12:33,152 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:12:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:12:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1979362449, now seen corresponding path program 1 times [2020-10-29 13:12:33,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:12:33,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723878816] [2020-10-29 13:12:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:12:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:33,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:33,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:34,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:35,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:35,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:35,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:35,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:38,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:38,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 490 [2020-10-29 13:12:38,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:12:38,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-29 13:12:38,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:38,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:12:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:12:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-29 13:12:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:39,366 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2020-10-29 13:12:39,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:12:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:12:39,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:12:39,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:12:39,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:12:39,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:12:39,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:12:39,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:12:39,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:12:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:12:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:12:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:12:39,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:12:39,681 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 13:12:39,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723878816] [2020-10-29 13:12:39,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:12:39,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:12:39,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844057281] [2020-10-29 13:12:39,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:12:39,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:12:39,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:12:39,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:12:39,684 INFO L87 Difference]: Start difference. First operand 77070 states and 123129 transitions. Second operand 4 states. [2020-10-29 13:13:03,154 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification that was a NOOP. DAG size: 420 [2020-10-29 13:13:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:13:07,224 INFO L93 Difference]: Finished difference Result 227140 states and 362395 transitions. [2020-10-29 13:13:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:13:07,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-10-29 13:13:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:13:07,504 INFO L225 Difference]: With dead ends: 227140 [2020-10-29 13:13:07,504 INFO L226 Difference]: Without dead ends: 152828 [2020-10-29 13:13:07,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:13:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152828 states.