/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=DEEPEST --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.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:41:35,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:41:35,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:41:35,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:41:35,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:41:35,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:41:35,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:41:35,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:41:35,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:41:35,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:41:35,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:41:35,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:41:35,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:41:35,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:41:35,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:41:35,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:41:35,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:41:35,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:41:35,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:41:35,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:41:35,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:41:35,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:41:35,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:41:35,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:41:35,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:41:35,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:41:35,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:41:35,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:41:35,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:41:35,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:41:35,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:41:35,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:41:35,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:41:35,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:41:35,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:41:35,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:41:35,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:41:35,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:41:35,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:41:35,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:41:35,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:41:35,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:41:35,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:41:35,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:41:35,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:41:35,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:41:35,907 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:41:35,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:41:35,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:41:35,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:41:35,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:41:35,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:41:35,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:41:35,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:41:35,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:41:35,911 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:41:35,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:41:35,912 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:41:35,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:41:35,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:41:35,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:41:35,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:41:35,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:41:35,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:41:35,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:41:35,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:41:35,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:41:35,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:41:35,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:41:35,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:41:35,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:41:35,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:41:36,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:41:36,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:41:36,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:41:36,384 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:41:36,384 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:41:36,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:41:36,470 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f09c1d614/bedd25da446b4d6c98d5e05ea6e88469/FLAG4b71782da [2020-10-27 23:41:37,104 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:41:37,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:41:37,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f09c1d614/bedd25da446b4d6c98d5e05ea6e88469/FLAG4b71782da [2020-10-27 23:41:37,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f09c1d614/bedd25da446b4d6c98d5e05ea6e88469 [2020-10-27 23:41:37,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:41:37,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:41:37,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:37,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:41:37,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:41:37,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:37,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ec7e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37, skipping insertion in model container [2020-10-27 23:41:37,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:37,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:41:37,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:41:37,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:37,889 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:41:37,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:37,986 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:41:37,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37 WrapperNode [2020-10-27 23:41:37,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:37,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:41:37,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:41:38,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:41:38,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:38,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:38,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:38,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:38,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:38,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:38,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (1/1) ... [2020-10-27 23:41:38,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:41:38,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:41:38,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:41:38,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:41:38,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (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 [2020-10-27 23:41:38,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:41:38,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:41:38,143 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:41:38,143 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:41:38,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:41:38,144 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:41:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:41:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:41:38,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:41:38,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:41:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:41:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:41:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:41:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:41:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:41:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:41:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:41:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:41:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:41:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:41:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:41:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:41:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:41:38,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:41:38,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:41:38,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:41:38,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:41:38,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:41:38,946 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:41:38,946 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:41:38,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:38 BoogieIcfgContainer [2020-10-27 23:41:38,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:41:38,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:41:38,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:41:38,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:41:38,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:41:37" (1/3) ... [2020-10-27 23:41:38,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a6d0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:38, skipping insertion in model container [2020-10-27 23:41:38,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:37" (2/3) ... [2020-10-27 23:41:38,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65a6d0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:38, skipping insertion in model container [2020-10-27 23:41:38,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:38" (3/3) ... [2020-10-27 23:41:38,958 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 23:41:38,970 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:41:38,976 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:41:38,989 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:41:39,018 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:41:39,018 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:41:39,019 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:41:39,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:41:39,019 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:41:39,019 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:41:39,019 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:41:39,019 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:41:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-27 23:41:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 23:41:39,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:39,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:39,048 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash 238077610, now seen corresponding path program 1 times [2020-10-27 23:41:39,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:39,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152166366] [2020-10-27 23:41:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:39,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:40,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 23:41:40,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:41:40,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-27 23:41:40,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 23:41:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 23:41:40,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:41:41,143 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:41:41,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:41,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:41,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:41,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:41,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:41:41,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:41,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:41,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152166366] [2020-10-27 23:41:41,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:41,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:41:41,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411978390] [2020-10-27 23:41:41,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:41:41,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:41:41,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:41:41,224 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 4 states. [2020-10-27 23:41:41,409 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:41,774 INFO L93 Difference]: Finished difference Result 159 states and 245 transitions. [2020-10-27 23:41:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:41:41,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-27 23:41:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:41,788 INFO L225 Difference]: With dead ends: 159 [2020-10-27 23:41:41,788 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 23:41:41,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 23:41:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-10-27 23:41:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 23:41:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 141 transitions. [2020-10-27 23:41:41,852 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 141 transitions. Word has length 42 [2020-10-27 23:41:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:41,853 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 141 transitions. [2020-10-27 23:41:41,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:41:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 141 transitions. [2020-10-27 23:41:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 23:41:41,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:41,855 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] [2020-10-27 23:41:41,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:41:41,856 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash 599007831, now seen corresponding path program 1 times [2020-10-27 23:41:41,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:41,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130922278] [2020-10-27 23:41:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:41,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:43,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 23:41:43,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:41:43,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1791 [2020-10-27 23:41:43,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:41:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:41:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 23:41:43,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:43,850 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:41:43,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:43,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:43,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:43,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:43,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:43,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:43,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:43,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:43,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130922278] [2020-10-27 23:41:43,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:43,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:41:43,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204777355] [2020-10-27 23:41:43,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:41:43,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:41:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:41:43,887 INFO L87 Difference]: Start difference. First operand 98 states and 141 transitions. Second operand 4 states. [2020-10-27 23:41:44,060 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:44,383 INFO L93 Difference]: Finished difference Result 232 states and 351 transitions. [2020-10-27 23:41:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:41:44,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-27 23:41:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:44,386 INFO L225 Difference]: With dead ends: 232 [2020-10-27 23:41:44,386 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 23:41:44,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 23:41:44,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-10-27 23:41:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-27 23:41:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 229 transitions. [2020-10-27 23:41:44,425 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 229 transitions. Word has length 43 [2020-10-27 23:41:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:44,425 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 229 transitions. [2020-10-27 23:41:44,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:41:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 229 transitions. [2020-10-27 23:41:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 23:41:44,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:44,429 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] [2020-10-27 23:41:44,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:41:44,430 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1673593743, now seen corresponding path program 1 times [2020-10-27 23:41:44,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:44,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868394816] [2020-10-27 23:41:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:44,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:48,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 23:41:48,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:41:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3901 [2020-10-27 23:41:48,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:41:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:48,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:41:48,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:48,588 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:41:48,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:48,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:48,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:48,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:48,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:41:48,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:48,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:48,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:48,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:48,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868394816] [2020-10-27 23:41:48,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:48,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:41:48,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804068980] [2020-10-27 23:41:48,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:41:48,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:48,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:41:48,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:41:48,632 INFO L87 Difference]: Start difference. First operand 154 states and 229 transitions. Second operand 7 states. [2020-10-27 23:41:48,804 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:49,187 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:41:49,360 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:49,764 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 23:41:49,929 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 23:41:50,256 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:50,419 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:50,767 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:41:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:50,829 INFO L93 Difference]: Finished difference Result 1196 states and 1865 transitions. [2020-10-27 23:41:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:41:50,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-27 23:41:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:50,842 INFO L225 Difference]: With dead ends: 1196 [2020-10-27 23:41:50,842 INFO L226 Difference]: Without dead ends: 1065 [2020-10-27 23:41:50,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:41:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2020-10-27 23:41:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 406. [2020-10-27 23:41:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-27 23:41:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 627 transitions. [2020-10-27 23:41:50,948 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 627 transitions. Word has length 44 [2020-10-27 23:41:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:50,948 INFO L481 AbstractCegarLoop]: Abstraction has 406 states and 627 transitions. [2020-10-27 23:41:50,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:41:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 627 transitions. [2020-10-27 23:41:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 23:41:50,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:50,959 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] [2020-10-27 23:41:50,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:41:50,960 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:50,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:50,960 INFO L82 PathProgramCache]: Analyzing trace with hash -838391252, now seen corresponding path program 1 times [2020-10-27 23:41:50,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:50,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722773167] [2020-10-27 23:41:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:51,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 23:41:51,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:41:51,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-27 23:41:51,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:51,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:51,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:41:51,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:41:51,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 23:41:51,938 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:41:51,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:51,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:51,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:51,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:51,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:41:51,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:51,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:51,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:51,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:51,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722773167] [2020-10-27 23:41:51,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:51,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:51,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376511165] [2020-10-27 23:41:51,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:51,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:51,969 INFO L87 Difference]: Start difference. First operand 406 states and 627 transitions. Second operand 6 states. [2020-10-27 23:41:52,137 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:41:52,483 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:52,744 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:52,883 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 23:41:53,093 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:41:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:53,217 INFO L93 Difference]: Finished difference Result 2704 states and 4251 transitions. [2020-10-27 23:41:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:53,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-27 23:41:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:53,232 INFO L225 Difference]: With dead ends: 2704 [2020-10-27 23:41:53,233 INFO L226 Difference]: Without dead ends: 2321 [2020-10-27 23:41:53,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:41:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2020-10-27 23:41:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 786. [2020-10-27 23:41:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 786 states. [2020-10-27 23:41:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1205 transitions. [2020-10-27 23:41:53,333 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1205 transitions. Word has length 44 [2020-10-27 23:41:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:53,333 INFO L481 AbstractCegarLoop]: Abstraction has 786 states and 1205 transitions. [2020-10-27 23:41:53,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1205 transitions. [2020-10-27 23:41:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 23:41:53,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:53,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:53,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:41:53,335 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash -162912687, now seen corresponding path program 1 times [2020-10-27 23:41:53,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:53,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510812629] [2020-10-27 23:41:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:53,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:53,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:54,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 23:41:54,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:41:54,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-27 23:41:54,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:54,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:41:54,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 23:41:54,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 23:41:54,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:54,391 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:41:54,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:54,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:54,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:54,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:54,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:41:54,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:54,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:54,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:54,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:54,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:54,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510812629] [2020-10-27 23:41:54,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:54,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:41:54,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242995415] [2020-10-27 23:41:54,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:41:54,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:41:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:41:54,429 INFO L87 Difference]: Start difference. First operand 786 states and 1205 transitions. Second operand 5 states. [2020-10-27 23:41:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:54,960 INFO L93 Difference]: Finished difference Result 1597 states and 2435 transitions. [2020-10-27 23:41:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:41:54,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-27 23:41:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:54,969 INFO L225 Difference]: With dead ends: 1597 [2020-10-27 23:41:54,970 INFO L226 Difference]: Without dead ends: 1594 [2020-10-27 23:41:54,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-10-27 23:41:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 834. [2020-10-27 23:41:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-10-27 23:41:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1253 transitions. [2020-10-27 23:41:55,073 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1253 transitions. Word has length 46 [2020-10-27 23:41:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:55,074 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 1253 transitions. [2020-10-27 23:41:55,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:41:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1253 transitions. [2020-10-27 23:41:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 23:41:55,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:55,075 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] [2020-10-27 23:41:55,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:41:55,076 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash 458616946, now seen corresponding path program 1 times [2020-10-27 23:41:55,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:55,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001355306] [2020-10-27 23:41:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:55,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:55,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 23:41:55,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:41:55,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 738 [2020-10-27 23:41:55,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:55,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:55,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:41:55,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:41:55,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:56,101 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:41:56,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:56,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:56,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:41:56,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:56,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:56,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:56,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:56,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:56,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001355306] [2020-10-27 23:41:56,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:56,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:56,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815055062] [2020-10-27 23:41:56,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:56,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:56,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:56,150 INFO L87 Difference]: Start difference. First operand 834 states and 1253 transitions. Second operand 6 states. [2020-10-27 23:41:56,394 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 23:41:56,823 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:41:57,158 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:41:57,325 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:41:57,592 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:41:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:57,752 INFO L93 Difference]: Finished difference Result 3276 states and 4949 transitions. [2020-10-27 23:41:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:57,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-27 23:41:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:57,765 INFO L225 Difference]: With dead ends: 3276 [2020-10-27 23:41:57,766 INFO L226 Difference]: Without dead ends: 2465 [2020-10-27 23:41:57,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:41:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2020-10-27 23:41:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 834. [2020-10-27 23:41:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-10-27 23:41:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1241 transitions. [2020-10-27 23:41:57,892 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1241 transitions. Word has length 46 [2020-10-27 23:41:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:57,892 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 1241 transitions. [2020-10-27 23:41:57,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1241 transitions. [2020-10-27 23:41:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 23:41:57,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:57,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:57,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:41:57,894 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash -246664494, now seen corresponding path program 1 times [2020-10-27 23:41:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:57,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19189326] [2020-10-27 23:41:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:57,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:02,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:02,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 23:42:02,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:42:02,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:42:02,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:02,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:42:02,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:02,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 23:42:02,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:03,093 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:42:03,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:03,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:03,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:03,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:03,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:03,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 23:42:03,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:03,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:03,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:03,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:03,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:03,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19189326] [2020-10-27 23:42:03,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:03,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:42:03,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524429666] [2020-10-27 23:42:03,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:42:03,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:42:03,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:42:03,161 INFO L87 Difference]: Start difference. First operand 834 states and 1241 transitions. Second operand 5 states. [2020-10-27 23:42:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:03,767 INFO L93 Difference]: Finished difference Result 2527 states and 3718 transitions. [2020-10-27 23:42:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:42:03,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-27 23:42:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:03,779 INFO L225 Difference]: With dead ends: 2527 [2020-10-27 23:42:03,779 INFO L226 Difference]: Without dead ends: 1716 [2020-10-27 23:42:03,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2020-10-27 23:42:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 839. [2020-10-27 23:42:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2020-10-27 23:42:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1248 transitions. [2020-10-27 23:42:03,922 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1248 transitions. Word has length 47 [2020-10-27 23:42:03,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:03,922 INFO L481 AbstractCegarLoop]: Abstraction has 839 states and 1248 transitions. [2020-10-27 23:42:03,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:42:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1248 transitions. [2020-10-27 23:42:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 23:42:03,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:03,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:03,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:42:03,923 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:03,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:03,924 INFO L82 PathProgramCache]: Analyzing trace with hash -457226808, now seen corresponding path program 1 times [2020-10-27 23:42:03,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:03,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192474393] [2020-10-27 23:42:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:03,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:04,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 23:42:04,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 23:42:04,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-27 23:42:04,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:04,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:42:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:42:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:42:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:42:04,551 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:42:04,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:04,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:04,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:04,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:04,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:42:04,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:04,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:04,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:04,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:04,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:04,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192474393] [2020-10-27 23:42:04,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:04,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:42:04,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543071202] [2020-10-27 23:42:04,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:42:04,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:42:04,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:42:04,587 INFO L87 Difference]: Start difference. First operand 839 states and 1248 transitions. Second operand 4 states. [2020-10-27 23:42:04,752 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:42:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:05,214 INFO L93 Difference]: Finished difference Result 2283 states and 3398 transitions. [2020-10-27 23:42:05,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:42:05,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-27 23:42:05,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:05,223 INFO L225 Difference]: With dead ends: 2283 [2020-10-27 23:42:05,224 INFO L226 Difference]: Without dead ends: 1470 [2020-10-27 23:42:05,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:42:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2020-10-27 23:42:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1443. [2020-10-27 23:42:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1443 states. [2020-10-27 23:42:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 2091 transitions. [2020-10-27 23:42:05,427 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 2091 transitions. Word has length 47 [2020-10-27 23:42:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:05,427 INFO L481 AbstractCegarLoop]: Abstraction has 1443 states and 2091 transitions. [2020-10-27 23:42:05,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:42:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 2091 transitions. [2020-10-27 23:42:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 23:42:05,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:05,428 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] [2020-10-27 23:42:05,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:42:05,429 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1464134686, now seen corresponding path program 1 times [2020-10-27 23:42:05,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:05,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889417417] [2020-10-27 23:42:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:05,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:06,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 23:42:06,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:42:06,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-27 23:42:06,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:42:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:42:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 23:42:06,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:06,654 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:42:06,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:06,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:06,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:06,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:06,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 23:42:06,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:06,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:06,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889417417] [2020-10-27 23:42:06,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:06,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:42:06,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379467879] [2020-10-27 23:42:06,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:42:06,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:06,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:42:06,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:42:06,707 INFO L87 Difference]: Start difference. First operand 1443 states and 2091 transitions. Second operand 4 states. [2020-10-27 23:42:06,881 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:42:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:07,428 INFO L93 Difference]: Finished difference Result 2825 states and 4143 transitions. [2020-10-27 23:42:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:42:07,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-27 23:42:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:07,444 INFO L225 Difference]: With dead ends: 2825 [2020-10-27 23:42:07,444 INFO L226 Difference]: Without dead ends: 2011 [2020-10-27 23:42:07,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:42:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2020-10-27 23:42:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 2008. [2020-10-27 23:42:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2008 states. [2020-10-27 23:42:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 2895 transitions. [2020-10-27 23:42:07,669 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 2895 transitions. Word has length 48 [2020-10-27 23:42:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:07,669 INFO L481 AbstractCegarLoop]: Abstraction has 2008 states and 2895 transitions. [2020-10-27 23:42:07,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:42:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 2895 transitions. [2020-10-27 23:42:07,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:42:07,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:07,672 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:07,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:42:07,672 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash 333818544, now seen corresponding path program 1 times [2020-10-27 23:42:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137070003] [2020-10-27 23:42:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:07,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:12,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:42:12,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:42:12,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:42:12,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:12,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:42:12,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 23:42:12,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:42:12,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:12,905 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:42:12,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:12,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:12,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:12,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:12,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:12,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:42:12,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:12,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:12,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:12,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:12,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:12,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137070003] [2020-10-27 23:42:12,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:12,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:42:12,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719414438] [2020-10-27 23:42:12,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:42:12,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:42:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:42:12,941 INFO L87 Difference]: Start difference. First operand 2008 states and 2895 transitions. Second operand 4 states. [2020-10-27 23:42:13,496 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 23:42:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:13,575 INFO L93 Difference]: Finished difference Result 3433 states and 4974 transitions. [2020-10-27 23:42:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:42:13,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 23:42:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:13,585 INFO L225 Difference]: With dead ends: 3433 [2020-10-27 23:42:13,585 INFO L226 Difference]: Without dead ends: 1450 [2020-10-27 23:42:13,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:42:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2020-10-27 23:42:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1447. [2020-10-27 23:42:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1447 states. [2020-10-27 23:42:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2076 transitions. [2020-10-27 23:42:13,789 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2076 transitions. Word has length 66 [2020-10-27 23:42:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:13,790 INFO L481 AbstractCegarLoop]: Abstraction has 1447 states and 2076 transitions. [2020-10-27 23:42:13,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:42:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2076 transitions. [2020-10-27 23:42:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:42:13,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:13,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:13,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:42:13,793 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:13,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:13,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1036104888, now seen corresponding path program 1 times [2020-10-27 23:42:13,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:13,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812344856] [2020-10-27 23:42:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:13,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:18,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:42:18,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:42:18,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 23:42:18,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 23:42:18,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 23:42:18,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:19,033 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:42:19,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:19,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:19,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:19,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:19,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:42:19,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:19,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:19,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:19,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:19,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 23:42:19,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812344856] [2020-10-27 23:42:19,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:42:19,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:42:19,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245225448] [2020-10-27 23:42:19,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:19,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:19,079 INFO L87 Difference]: Start difference. First operand 1447 states and 2076 transitions. Second operand 6 states. [2020-10-27 23:42:19,271 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:42:19,754 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 23:42:19,946 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:42:20,093 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:42:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:20,546 INFO L93 Difference]: Finished difference Result 6678 states and 9678 transitions. [2020-10-27 23:42:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:42:20,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:42:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:20,574 INFO L225 Difference]: With dead ends: 6678 [2020-10-27 23:42:20,575 INFO L226 Difference]: Without dead ends: 5299 [2020-10-27 23:42:20,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2020-10-27 23:42:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 3367. [2020-10-27 23:42:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3367 states. [2020-10-27 23:42:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3367 states to 3367 states and 4824 transitions. [2020-10-27 23:42:20,994 INFO L78 Accepts]: Start accepts. Automaton has 3367 states and 4824 transitions. Word has length 67 [2020-10-27 23:42:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:20,996 INFO L481 AbstractCegarLoop]: Abstraction has 3367 states and 4824 transitions. [2020-10-27 23:42:20,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3367 states and 4824 transitions. [2020-10-27 23:42:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:42:20,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:20,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:20,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:42:21,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1772206770, now seen corresponding path program 1 times [2020-10-27 23:42:21,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:21,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600382021] [2020-10-27 23:42:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:21,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:26,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:42:26,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:42:26,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:42:26,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:26,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:26,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:26,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:42:26,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:26,251 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:42:26,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:26,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:26,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:26,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:42:26,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:26,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:26,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:26,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:42:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:26,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600382021] [2020-10-27 23:42:26,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:42:26,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:42:26,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127521701] [2020-10-27 23:42:26,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:26,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:26,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:26,298 INFO L87 Difference]: Start difference. First operand 3367 states and 4824 transitions. Second operand 6 states. [2020-10-27 23:42:26,528 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 23:42:27,270 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 23:42:27,459 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 23:42:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:28,627 INFO L93 Difference]: Finished difference Result 16406 states and 23330 transitions. [2020-10-27 23:42:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:28,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:42:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:28,687 INFO L225 Difference]: With dead ends: 16406 [2020-10-27 23:42:28,687 INFO L226 Difference]: Without dead ends: 14199 [2020-10-27 23:42:28,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14199 states. [2020-10-27 23:42:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14199 to 9952. [2020-10-27 23:42:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9952 states. [2020-10-27 23:42:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 14154 transitions. [2020-10-27 23:42:29,981 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 14154 transitions. Word has length 67 [2020-10-27 23:42:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:29,981 INFO L481 AbstractCegarLoop]: Abstraction has 9952 states and 14154 transitions. [2020-10-27 23:42:29,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 14154 transitions. [2020-10-27 23:42:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:42:29,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:29,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:29,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:42:29,991 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash -435607596, now seen corresponding path program 1 times [2020-10-27 23:42:29,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:29,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775138467] [2020-10-27 23:42:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:30,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:31,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:35,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:42:35,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:42:35,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:42:35,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:42:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 23:42:35,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:35,223 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:42:35,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:35,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:35,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:35,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:35,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:35,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:35,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:35,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:42:35,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775138467] [2020-10-27 23:42:35,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:42:35,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:42:35,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791027638] [2020-10-27 23:42:35,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:35,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:35,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:35,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:35,264 INFO L87 Difference]: Start difference. First operand 9952 states and 14154 transitions. Second operand 6 states. [2020-10-27 23:42:35,449 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:42:36,061 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:42:36,228 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 23:42:36,383 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 23:42:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:37,942 INFO L93 Difference]: Finished difference Result 28277 states and 40144 transitions. [2020-10-27 23:42:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:42:37,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-27 23:42:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:38,000 INFO L225 Difference]: With dead ends: 28277 [2020-10-27 23:42:38,000 INFO L226 Difference]: Without dead ends: 22526 [2020-10-27 23:42:38,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22526 states. [2020-10-27 23:42:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22526 to 16132. [2020-10-27 23:42:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-10-27 23:42:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 22866 transitions. [2020-10-27 23:42:39,794 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 22866 transitions. Word has length 67 [2020-10-27 23:42:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:39,794 INFO L481 AbstractCegarLoop]: Abstraction has 16132 states and 22866 transitions. [2020-10-27 23:42:39,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 22866 transitions. [2020-10-27 23:42:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 23:42:39,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:39,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:39,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:42:39,798 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:39,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1546931364, now seen corresponding path program 1 times [2020-10-27 23:42:39,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:39,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413422911] [2020-10-27 23:42:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:39,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:40,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:41,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:43,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:44,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 23:42:44,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:42:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:42:44,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:42:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:44,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:42:44,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:45,153 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-27 23:42:45,378 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:42:45,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:45,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:45,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:42:45,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:45,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:45,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:45,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:45,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413422911] [2020-10-27 23:42:45,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:42:45,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 23:42:45,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853381925] [2020-10-27 23:42:45,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:42:45,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:45,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:42:45,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:42:45,428 INFO L87 Difference]: Start difference. First operand 16132 states and 22866 transitions. Second operand 12 states. [2020-10-27 23:42:45,945 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 134 [2020-10-27 23:42:46,579 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-27 23:42:47,023 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-27 23:42:47,308 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-10-27 23:42:47,524 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-27 23:42:48,932 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 23:42:49,140 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:42:49,404 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:42:50,680 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-27 23:42:51,073 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-27 23:42:52,286 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-27 23:42:52,892 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 23:42:53,214 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 23:42:53,889 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-27 23:42:54,233 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-10-27 23:42:54,509 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-27 23:42:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:56,916 INFO L93 Difference]: Finished difference Result 48223 states and 66852 transitions. [2020-10-27 23:42:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 23:42:56,916 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-27 23:42:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:57,027 INFO L225 Difference]: With dead ends: 48223 [2020-10-27 23:42:57,027 INFO L226 Difference]: Without dead ends: 42472 [2020-10-27 23:42:57,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 23:42:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42472 states. [2020-10-27 23:42:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42472 to 19575. [2020-10-27 23:42:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19575 states. [2020-10-27 23:42:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19575 states to 19575 states and 27808 transitions. [2020-10-27 23:42:59,471 INFO L78 Accepts]: Start accepts. Automaton has 19575 states and 27808 transitions. Word has length 67 [2020-10-27 23:42:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:59,471 INFO L481 AbstractCegarLoop]: Abstraction has 19575 states and 27808 transitions. [2020-10-27 23:42:59,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:42:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19575 states and 27808 transitions. [2020-10-27 23:42:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 23:42:59,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:59,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:59,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:42:59,476 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash -293737829, now seen corresponding path program 1 times [2020-10-27 23:42:59,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:59,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664648180] [2020-10-27 23:42:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:59,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:59,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:59,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:59,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:03,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:03,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:04,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 23:43:04,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:43:04,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:43:04,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:04,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:43:04,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:43:04,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 23:43:04,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:04,706 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:43:04,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:04,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:04,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:04,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:04,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:43:04,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:04,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:04,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 23:43:04,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664648180] [2020-10-27 23:43:04,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:43:04,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 23:43:04,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183955948] [2020-10-27 23:43:04,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:43:04,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:04,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:43:04,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:43:04,745 INFO L87 Difference]: Start difference. First operand 19575 states and 27808 transitions. Second operand 5 states. [2020-10-27 23:43:04,944 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:43:05,555 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:43:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:08,045 INFO L93 Difference]: Finished difference Result 46340 states and 65367 transitions. [2020-10-27 23:43:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 23:43:08,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 23:43:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:08,100 INFO L225 Difference]: With dead ends: 46340 [2020-10-27 23:43:08,100 INFO L226 Difference]: Without dead ends: 26875 [2020-10-27 23:43:08,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:43:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26875 states. [2020-10-27 23:43:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26875 to 26560. [2020-10-27 23:43:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26560 states. [2020-10-27 23:43:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26560 states to 26560 states and 36487 transitions. [2020-10-27 23:43:11,342 INFO L78 Accepts]: Start accepts. Automaton has 26560 states and 36487 transitions. Word has length 68 [2020-10-27 23:43:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:11,342 INFO L481 AbstractCegarLoop]: Abstraction has 26560 states and 36487 transitions. [2020-10-27 23:43:11,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:43:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 26560 states and 36487 transitions. [2020-10-27 23:43:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 23:43:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:11,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:11,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:43:11,347 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:11,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1030290536, now seen corresponding path program 1 times [2020-10-27 23:43:11,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:11,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855952990] [2020-10-27 23:43:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:11,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:15,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 23:43:15,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 23:43:15,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4210 [2020-10-27 23:43:15,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 23:43:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 23:43:15,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:15,760 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:43:15,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:15,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:15,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:15,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:15,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:15,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:15,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:15,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:15,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:15,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855952990] [2020-10-27 23:43:15,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:43:15,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:43:15,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614566751] [2020-10-27 23:43:15,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:15,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:15,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:15,785 INFO L87 Difference]: Start difference. First operand 26560 states and 36487 transitions. Second operand 6 states. [2020-10-27 23:43:15,976 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:43:16,595 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 23:43:16,761 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 23:43:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:20,190 INFO L93 Difference]: Finished difference Result 42990 states and 59941 transitions. [2020-10-27 23:43:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 23:43:20,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-27 23:43:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:20,245 INFO L225 Difference]: With dead ends: 42990 [2020-10-27 23:43:20,245 INFO L226 Difference]: Without dead ends: 35532 [2020-10-27 23:43:20,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35532 states. [2020-10-27 23:43:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35532 to 31764. [2020-10-27 23:43:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31764 states. [2020-10-27 23:43:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31764 states to 31764 states and 44058 transitions. [2020-10-27 23:43:24,121 INFO L78 Accepts]: Start accepts. Automaton has 31764 states and 44058 transitions. Word has length 68 [2020-10-27 23:43:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:24,121 INFO L481 AbstractCegarLoop]: Abstraction has 31764 states and 44058 transitions. [2020-10-27 23:43:24,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 31764 states and 44058 transitions. [2020-10-27 23:43:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:43:24,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:24,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:24,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:43:24,125 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash -565626226, now seen corresponding path program 1 times [2020-10-27 23:43:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:24,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618275779] [2020-10-27 23:43:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:24,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:26,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:27,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:29,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:43:29,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:43:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:43:29,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 23:43:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:29,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:43:29,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:29,426 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 18 [2020-10-27 23:43:29,677 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:43:29,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:29,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:29,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:29,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:29,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:29,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:29,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:29,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:29,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:29,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618275779] [2020-10-27 23:43:29,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:43:29,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 23:43:29,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337775947] [2020-10-27 23:43:29,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 23:43:29,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 23:43:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:29,708 INFO L87 Difference]: Start difference. First operand 31764 states and 44058 transitions. Second operand 13 states. [2020-10-27 23:43:30,238 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2020-10-27 23:43:31,770 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 23:43:31,939 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 23:43:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:41,798 INFO L93 Difference]: Finished difference Result 99724 states and 136778 transitions. [2020-10-27 23:43:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 23:43:41,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-10-27 23:43:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:41,910 INFO L225 Difference]: With dead ends: 99724 [2020-10-27 23:43:41,910 INFO L226 Difference]: Without dead ends: 68534 [2020-10-27 23:43:41,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=458, Invalid=2404, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 23:43:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68534 states. [2020-10-27 23:43:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68534 to 44027. [2020-10-27 23:43:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44027 states. [2020-10-27 23:43:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44027 states to 44027 states and 61167 transitions. [2020-10-27 23:43:47,461 INFO L78 Accepts]: Start accepts. Automaton has 44027 states and 61167 transitions. Word has length 69 [2020-10-27 23:43:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:47,462 INFO L481 AbstractCegarLoop]: Abstraction has 44027 states and 61167 transitions. [2020-10-27 23:43:47,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 23:43:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 44027 states and 61167 transitions. [2020-10-27 23:43:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:43:47,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:47,465 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:47,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:43:47,465 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash 986653722, now seen corresponding path program 1 times [2020-10-27 23:43:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:47,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068679414] [2020-10-27 23:43:47,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:47,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:52,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:52,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:43:52,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:43:52,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:43:52,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 23:43:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:52,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 23:43:52,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:52,724 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-10-27 23:43:53,011 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:43:53,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:53,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:53,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:53,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:53,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:53,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:43:53,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:53,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:53,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:53,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:53,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:53,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068679414] [2020-10-27 23:43:53,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:43:53,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 23:43:53,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514004880] [2020-10-27 23:43:53,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 23:43:53,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:53,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 23:43:53,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:43:53,039 INFO L87 Difference]: Start difference. First operand 44027 states and 61167 transitions. Second operand 14 states. [2020-10-27 23:43:53,295 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 23:43:55,813 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 23:43:56,070 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 23:43:58,619 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 23:44:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:20,059 INFO L93 Difference]: Finished difference Result 192873 states and 263112 transitions. [2020-10-27 23:44:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 23:44:20,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-10-27 23:44:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:20,426 INFO L225 Difference]: With dead ends: 192873 [2020-10-27 23:44:20,426 INFO L226 Difference]: Without dead ends: 186025 [2020-10-27 23:44:20,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=366, Invalid=1986, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 23:44:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186025 states. [2020-10-27 23:44:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186025 to 70016. [2020-10-27 23:44:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70016 states. [2020-10-27 23:44:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70016 states to 70016 states and 97197 transitions. [2020-10-27 23:44:31,072 INFO L78 Accepts]: Start accepts. Automaton has 70016 states and 97197 transitions. Word has length 69 [2020-10-27 23:44:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:31,072 INFO L481 AbstractCegarLoop]: Abstraction has 70016 states and 97197 transitions. [2020-10-27 23:44:31,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 23:44:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 70016 states and 97197 transitions. [2020-10-27 23:44:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:44:31,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:31,076 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:31,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:44:31,076 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2034580380, now seen corresponding path program 1 times [2020-10-27 23:44:31,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:31,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923019152] [2020-10-27 23:44:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:31,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:32,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:35,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:36,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 23:44:36,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:44:36,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:44:36,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:44:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:44:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 23:44:36,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:36,272 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 23:44:36,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:36,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:36,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:36,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:36,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:36,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:36,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:36,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:36,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:36,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923019152] [2020-10-27 23:44:36,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 23:44:36,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 23:44:36,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986139801] [2020-10-27 23:44:36,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:44:36,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:44:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:44:36,295 INFO L87 Difference]: Start difference. First operand 70016 states and 97197 transitions. Second operand 6 states. [2020-10-27 23:44:36,461 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 23:44:37,371 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 23:44:37,585 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 23:44:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:55,577 INFO L93 Difference]: Finished difference Result 196182 states and 272616 transitions. [2020-10-27 23:44:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:55,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-27 23:44:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:55,830 INFO L225 Difference]: With dead ends: 196182 [2020-10-27 23:44:55,830 INFO L226 Difference]: Without dead ends: 134053 [2020-10-27 23:44:55,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:44:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134053 states. [2020-10-27 23:45:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134053 to 92335. [2020-10-27 23:45:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92335 states. [2020-10-27 23:45:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92335 states to 92335 states and 127807 transitions. [2020-10-27 23:45:09,120 INFO L78 Accepts]: Start accepts. Automaton has 92335 states and 127807 transitions. Word has length 69 [2020-10-27 23:45:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:09,120 INFO L481 AbstractCegarLoop]: Abstraction has 92335 states and 127807 transitions. [2020-10-27 23:45:09,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:45:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 92335 states and 127807 transitions. [2020-10-27 23:45:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 23:45:09,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:09,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:09,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 23:45:09,125 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash -482300432, now seen corresponding path program 1 times [2020-10-27 23:45:09,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:09,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199673833] [2020-10-27 23:45:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:09,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking...