/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:44:45,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:44:45,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:44:45,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:44:45,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:44:45,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:44:45,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:44:45,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:44:45,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:44:45,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:44:45,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:44:45,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:44:45,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:44:45,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:44:45,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:44:45,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:44:45,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:44:45,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:44:45,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:44:45,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:44:45,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:44:45,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:44:45,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:44:45,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:44:45,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:44:45,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:44:45,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:44:45,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:44:45,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:44:45,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:44:45,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:44:45,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:44:45,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:44:45,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:44:45,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:44:45,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:44:45,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:44:45,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:44:45,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:44:45,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:44:45,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:44:45,861 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 [2020-10-26 20:44:45,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:44:45,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:44:45,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:44:45,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:44:45,922 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:44:45,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:44:45,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:44:45,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:44:45,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:44:45,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:44:45,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:44:45,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:44:45,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:44:45,925 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:44:45,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:44:45,926 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:44:45,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:44:45,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:44:45,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:44:45,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:44:45,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:44:45,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:44:45,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:44:45,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:44:45,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:44:45,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:44:45,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:44:45,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:44:45,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:44:45,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:44:46,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:44:46,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:44:46,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:44:46,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:44:46,392 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:44:46,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2020-10-26 20:44:46,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df4d869c4/256092d303c34f1db64ab80cc7d6f5a7/FLAG457339cdd [2020-10-26 20:44:47,300 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:44:47,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2020-10-26 20:44:47,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df4d869c4/256092d303c34f1db64ab80cc7d6f5a7/FLAG457339cdd [2020-10-26 20:44:47,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/df4d869c4/256092d303c34f1db64ab80cc7d6f5a7 [2020-10-26 20:44:47,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:44:47,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:44:47,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:44:47,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:44:47,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:44:47,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:44:47" (1/1) ... [2020-10-26 20:44:47,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1791f688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:47, skipping insertion in model container [2020-10-26 20:44:47,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:44:47" (1/1) ... [2020-10-26 20:44:47,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:44:47,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:44:48,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:44:48,418 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:44:48,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:44:48,741 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:44:48,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48 WrapperNode [2020-10-26 20:44:48,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:44:48,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:44:48,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:44:48,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:44:48,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (1/1) ... [2020-10-26 20:44:48,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:44:48,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:44:48,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:44:48,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:44:48,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (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 [2020-10-26 20:44:49,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:44:49,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:44:49,032 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:44:49,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:44:49,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:44:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:44:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:44:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:44:49,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:44:49,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:44:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:44:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:44:49,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:44:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:44:49,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:44:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:44:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:44:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:44:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:44:51,302 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:44:51,302 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:44:51,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:44:51 BoogieIcfgContainer [2020-10-26 20:44:51,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:44:51,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:44:51,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:44:51,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:44:51,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:44:47" (1/3) ... [2020-10-26 20:44:51,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a6fb0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:44:51, skipping insertion in model container [2020-10-26 20:44:51,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:48" (2/3) ... [2020-10-26 20:44:51,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a6fb0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:44:51, skipping insertion in model container [2020-10-26 20:44:51,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:44:51" (3/3) ... [2020-10-26 20:44:51,314 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2020-10-26 20:44:51,326 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:44:51,332 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:44:51,346 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:44:51,377 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:44:51,377 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:44:51,377 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:44:51,378 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:44:51,378 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:44:51,378 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:44:51,378 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:44:51,378 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:44:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:44:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-26 20:44:51,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:51,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:51,435 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:51,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2143766272, now seen corresponding path program 1 times [2020-10-26 20:44:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:51,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465248986] [2020-10-26 20:44:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:52,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:56,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:56,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-26 20:44:56,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:56,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4998 [2020-10-26 20:44:56,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:56,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:44:56,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:56,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:44:56,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:44:58,315 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-26 20:44:58,568 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-26 20:44:58,989 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-26 20:44:59,419 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 83 [2020-10-26 20:45:00,206 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 94 [2020-10-26 20:45:00,772 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 87 [2020-10-26 20:45:01,273 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 79 [2020-10-26 20:45:01,752 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 70 [2020-10-26 20:45:02,232 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 59 [2020-10-26 20:45:02,538 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:02,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:02,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:02,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:02,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:02,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:02,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:45:02,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:02,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:02,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:02,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:02,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:03,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465248986] [2020-10-26 20:45:03,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:03,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:45:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980549667] [2020-10-26 20:45:03,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:45:03,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:03,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:45:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:03,196 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:45:03,768 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:45:04,903 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 208 DAG size of output: 208 [2020-10-26 20:45:06,277 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 229 DAG size of output: 210 [2020-10-26 20:45:07,814 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 249 DAG size of output: 231 [2020-10-26 20:45:10,013 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 262 DAG size of output: 228 [2020-10-26 20:45:12,474 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 269 DAG size of output: 225 [2020-10-26 20:45:14,997 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 266 DAG size of output: 222 [2020-10-26 20:45:19,445 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 267 DAG size of output: 219 [2020-10-26 20:45:21,684 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 269 DAG size of output: 214 [2020-10-26 20:45:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:25,031 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:45:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:45:25,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 172 [2020-10-26 20:45:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:25,050 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:45:25,051 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:45:25,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:45:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:45:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:45:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:45:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:45:25,135 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 172 [2020-10-26 20:45:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:25,136 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:45:25,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:45:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:45:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-26 20:45:25,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:25,142 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:25,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:45:25,143 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:25,144 INFO L82 PathProgramCache]: Analyzing trace with hash -885590419, now seen corresponding path program 1 times [2020-10-26 20:45:25,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:25,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312649802] [2020-10-26 20:45:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:25,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:26,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:30,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:30,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-26 20:45:30,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:30,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 20:45:30,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:30,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:30,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-26 20:45:30,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 20:45:30,651 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:30,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:30,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:30,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:30,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:30,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:45:30,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:30,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:30,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:30,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:30,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:30,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:30,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:45:30,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:30,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:45:30,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:45:31,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312649802] [2020-10-26 20:45:31,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:31,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:45:31,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796249293] [2020-10-26 20:45:31,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:45:31,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:31,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:45:31,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:45:31,046 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:45:31,329 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:45:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:34,348 INFO L93 Difference]: Finished difference Result 829 states and 1288 transitions. [2020-10-26 20:45:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:45:34,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2020-10-26 20:45:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:34,356 INFO L225 Difference]: With dead ends: 829 [2020-10-26 20:45:34,356 INFO L226 Difference]: Without dead ends: 585 [2020-10-26 20:45:34,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-26 20:45:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 582. [2020-10-26 20:45:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-26 20:45:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 778 transitions. [2020-10-26 20:45:34,401 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 778 transitions. Word has length 183 [2020-10-26 20:45:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:34,402 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 778 transitions. [2020-10-26 20:45:34,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:45:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 778 transitions. [2020-10-26 20:45:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 20:45:34,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:34,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:34,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:45:34,407 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:34,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1829463065, now seen corresponding path program 1 times [2020-10-26 20:45:34,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:34,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516180993] [2020-10-26 20:45:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:35,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:35,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 20:45:35,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:35,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-26 20:45:35,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:45:35,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-26 20:45:35,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:35,703 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:35,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:35,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:35,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:35,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:35,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:35,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:45:35,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:35,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:35,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:35,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:35,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:35,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:35,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:35,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:35,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:35,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:35,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:45:35,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:45:35,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:36,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516180993] [2020-10-26 20:45:36,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:36,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:45:36,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890634453] [2020-10-26 20:45:36,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:45:36,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:36,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:45:36,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:45:36,033 INFO L87 Difference]: Start difference. First operand 582 states and 778 transitions. Second operand 5 states. [2020-10-26 20:45:36,456 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:39,510 INFO L93 Difference]: Finished difference Result 1264 states and 1799 transitions. [2020-10-26 20:45:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:45:39,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2020-10-26 20:45:39,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:39,519 INFO L225 Difference]: With dead ends: 1264 [2020-10-26 20:45:39,519 INFO L226 Difference]: Without dead ends: 803 [2020-10-26 20:45:39,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:45:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2020-10-26 20:45:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 802. [2020-10-26 20:45:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 802 states. [2020-10-26 20:45:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1084 transitions. [2020-10-26 20:45:39,572 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1084 transitions. Word has length 193 [2020-10-26 20:45:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:39,573 INFO L481 AbstractCegarLoop]: Abstraction has 802 states and 1084 transitions. [2020-10-26 20:45:39,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:45:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1084 transitions. [2020-10-26 20:45:39,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 20:45:39,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:39,578 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:39,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:45:39,578 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:39,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1083853379, now seen corresponding path program 1 times [2020-10-26 20:45:39,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:39,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479153925] [2020-10-26 20:45:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:39,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:40,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:42,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:42,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 20:45:42,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:42,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2508 [2020-10-26 20:45:42,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:42,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:45:42,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:45:42,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:42,415 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:42,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:42,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:42,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:42,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:42,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:42,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:45:42,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:42,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:42,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:42,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:42,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:42,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:42,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:42,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:42,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:42,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:42,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 20:45:42,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:42,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:45:42,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:42,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:42,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:42,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:45:42,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:42,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 20:45:42,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:42,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:42,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:42,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:45:42,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:45:42,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479153925] [2020-10-26 20:45:42,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:42,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:42,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256608104] [2020-10-26 20:45:42,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:42,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:42,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:42,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:42,826 INFO L87 Difference]: Start difference. First operand 802 states and 1084 transitions. Second operand 7 states. [2020-10-26 20:45:43,279 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:43,982 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:48,762 INFO L93 Difference]: Finished difference Result 2400 states and 3609 transitions. [2020-10-26 20:45:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:45:48,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-10-26 20:45:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:48,780 INFO L225 Difference]: With dead ends: 2400 [2020-10-26 20:45:48,780 INFO L226 Difference]: Without dead ends: 1719 [2020-10-26 20:45:48,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2020-10-26 20:45:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1704. [2020-10-26 20:45:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-10-26 20:45:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2387 transitions. [2020-10-26 20:45:48,887 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2387 transitions. Word has length 203 [2020-10-26 20:45:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:48,888 INFO L481 AbstractCegarLoop]: Abstraction has 1704 states and 2387 transitions. [2020-10-26 20:45:48,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2387 transitions. [2020-10-26 20:45:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-26 20:45:48,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:48,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:48,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:45:48,898 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1198458992, now seen corresponding path program 1 times [2020-10-26 20:45:48,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:48,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414124509] [2020-10-26 20:45:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:49,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:51,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:51,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:51,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 20:45:51,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:51,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2498 [2020-10-26 20:45:51,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:51,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-26 20:45:51,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:51,857 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:51,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:51,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:51,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:51,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:51,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:45:51,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:51,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:51,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:52,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:52,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:52,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:45:52,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:52,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 20:45:52,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:45:52,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:45:52,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414124509] [2020-10-26 20:45:52,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:52,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:45:52,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215282102] [2020-10-26 20:45:52,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:45:52,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:52,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:45:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:45:52,225 INFO L87 Difference]: Start difference. First operand 1704 states and 2387 transitions. Second operand 6 states. [2020-10-26 20:45:52,544 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:45:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:55,922 INFO L93 Difference]: Finished difference Result 4872 states and 7340 transitions. [2020-10-26 20:45:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:45:55,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2020-10-26 20:45:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:55,948 INFO L225 Difference]: With dead ends: 4872 [2020-10-26 20:45:55,948 INFO L226 Difference]: Without dead ends: 3289 [2020-10-26 20:45:55,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:45:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2020-10-26 20:45:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 3247. [2020-10-26 20:45:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3247 states. [2020-10-26 20:45:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 4668 transitions. [2020-10-26 20:45:56,086 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 4668 transitions. Word has length 204 [2020-10-26 20:45:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:56,087 INFO L481 AbstractCegarLoop]: Abstraction has 3247 states and 4668 transitions. [2020-10-26 20:45:56,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:45:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 4668 transitions. [2020-10-26 20:45:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-26 20:45:56,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:56,099 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:56,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:45:56,099 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:56,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1777146356, now seen corresponding path program 1 times [2020-10-26 20:45:56,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:56,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512427323] [2020-10-26 20:45:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:56,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:56,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:57,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-26 20:46:00,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:00,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4056 [2020-10-26 20:46:00,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:46:00,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,486 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:00,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:00,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:00,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:46:00,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:00,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:00,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:00,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 20:46:00,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:46:00,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:46:00,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:00,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:46:00,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:00,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:00,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:46:00,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:46:00,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512427323] [2020-10-26 20:46:00,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:00,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:00,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407769275] [2020-10-26 20:46:00,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:00,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:00,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:00,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:00,943 INFO L87 Difference]: Start difference. First operand 3247 states and 4668 transitions. Second operand 8 states. [2020-10-26 20:46:01,221 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:02,245 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:46:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:05,638 INFO L93 Difference]: Finished difference Result 9326 states and 14204 transitions. [2020-10-26 20:46:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:46:05,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 207 [2020-10-26 20:46:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:05,682 INFO L225 Difference]: With dead ends: 9326 [2020-10-26 20:46:05,682 INFO L226 Difference]: Without dead ends: 6204 [2020-10-26 20:46:05,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:46:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6204 states. [2020-10-26 20:46:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6204 to 6161. [2020-10-26 20:46:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6161 states. [2020-10-26 20:46:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6161 states to 6161 states and 9008 transitions. [2020-10-26 20:46:05,924 INFO L78 Accepts]: Start accepts. Automaton has 6161 states and 9008 transitions. Word has length 207 [2020-10-26 20:46:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:05,925 INFO L481 AbstractCegarLoop]: Abstraction has 6161 states and 9008 transitions. [2020-10-26 20:46:05,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6161 states and 9008 transitions. [2020-10-26 20:46:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-26 20:46:05,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:05,943 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:05,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:46:05,944 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:05,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1225532784, now seen corresponding path program 1 times [2020-10-26 20:46:05,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:05,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585070203] [2020-10-26 20:46:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:06,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:06,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:07,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:09,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:09,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-26 20:46:09,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:09,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3415 [2020-10-26 20:46:09,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:09,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:09,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:09,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 20:46:09,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:09,677 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:09,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:09,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:09,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:09,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:09,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:09,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:46:09,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:09,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:09,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:09,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:09,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:09,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:09,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:09,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:46:09,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:46:09,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:09,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:09,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:09,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:46:09,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:09,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:46:09,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:09,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:09,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:09,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:46:09,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:46:10,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585070203] [2020-10-26 20:46:10,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:10,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:10,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838734380] [2020-10-26 20:46:10,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:10,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:10,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:10,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:10,197 INFO L87 Difference]: Start difference. First operand 6161 states and 9008 transitions. Second operand 8 states. [2020-10-26 20:46:10,454 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:13,241 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:46:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:14,714 INFO L93 Difference]: Finished difference Result 18279 states and 28481 transitions. [2020-10-26 20:46:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:46:14,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 209 [2020-10-26 20:46:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:14,805 INFO L225 Difference]: With dead ends: 18279 [2020-10-26 20:46:14,805 INFO L226 Difference]: Without dead ends: 12243 [2020-10-26 20:46:14,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:46:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2020-10-26 20:46:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 11932. [2020-10-26 20:46:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11932 states. [2020-10-26 20:46:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 17340 transitions. [2020-10-26 20:46:15,337 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 17340 transitions. Word has length 209 [2020-10-26 20:46:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:15,338 INFO L481 AbstractCegarLoop]: Abstraction has 11932 states and 17340 transitions. [2020-10-26 20:46:15,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 17340 transitions. [2020-10-26 20:46:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-26 20:46:15,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:15,356 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:15,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:46:15,356 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:15,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1491169819, now seen corresponding path program 1 times [2020-10-26 20:46:15,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:15,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182493123] [2020-10-26 20:46:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:15,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:18,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:18,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-26 20:46:18,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:18,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3272 [2020-10-26 20:46:18,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:18,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:46:18,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:18,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-26 20:46:18,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:19,015 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:19,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:19,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:19,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:19,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:19,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:19,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:46:19,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:19,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:19,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:19,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:19,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:19,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:19,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:19,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:19,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-26 20:46:19,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:46:19,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:19,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:19,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:19,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:19,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:46:19,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:19,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 20:46:19,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:19,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:19,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:19,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:46:19,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:46:19,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182493123] [2020-10-26 20:46:19,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:19,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:46:19,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887645866] [2020-10-26 20:46:19,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:46:19,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:19,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:46:19,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:46:19,545 INFO L87 Difference]: Start difference. First operand 11932 states and 17340 transitions. Second operand 9 states. [2020-10-26 20:46:19,890 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:20,292 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:22,165 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:26,467 INFO L93 Difference]: Finished difference Result 39943 states and 55179 transitions. [2020-10-26 20:46:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:46:26,467 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 227 [2020-10-26 20:46:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:26,580 INFO L225 Difference]: With dead ends: 39943 [2020-10-26 20:46:26,580 INFO L226 Difference]: Without dead ends: 28341 [2020-10-26 20:46:26,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:46:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28341 states. [2020-10-26 20:46:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28341 to 28257. [2020-10-26 20:46:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28257 states. [2020-10-26 20:46:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28257 states to 28257 states and 36272 transitions. [2020-10-26 20:46:27,740 INFO L78 Accepts]: Start accepts. Automaton has 28257 states and 36272 transitions. Word has length 227 [2020-10-26 20:46:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:27,741 INFO L481 AbstractCegarLoop]: Abstraction has 28257 states and 36272 transitions. [2020-10-26 20:46:27,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:46:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 28257 states and 36272 transitions. [2020-10-26 20:46:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 20:46:27,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:27,779 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:27,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:46:27,779 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:27,780 INFO L82 PathProgramCache]: Analyzing trace with hash 453677752, now seen corresponding path program 1 times [2020-10-26 20:46:27,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:27,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951892133] [2020-10-26 20:46:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:27,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:28,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:30,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:32,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:32,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-26 20:46:32,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:32,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 20:46:32,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:32,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:32,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:32,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:46:32,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:33,186 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:33,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:33,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:33,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:33,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:33,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:33,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:46:33,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:33,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:33,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:33,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:33,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:33,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:33,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:33,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:46:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:46:33,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:33,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:46:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:33,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:33,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:33,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:46:33,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:33,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 20:46:33,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:33,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:33,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:33,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:46:33,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:33,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:46:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:33,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:33,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:33,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:46:33,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:46:33,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:33,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:46:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:33,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 53 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:46:33,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951892133] [2020-10-26 20:46:33,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:33,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:46:33,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793870853] [2020-10-26 20:46:33,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:33,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:33,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:33,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:33,705 INFO L87 Difference]: Start difference. First operand 28257 states and 36272 transitions. Second operand 8 states. [2020-10-26 20:46:33,993 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:35,315 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:46:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:38,575 INFO L93 Difference]: Finished difference Result 67475 states and 89637 transitions. [2020-10-26 20:46:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:46:38,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 229 [2020-10-26 20:46:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:38,709 INFO L225 Difference]: With dead ends: 67475 [2020-10-26 20:46:38,709 INFO L226 Difference]: Without dead ends: 39548 [2020-10-26 20:46:38,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:46:38,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39548 states. [2020-10-26 20:46:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39548 to 39289. [2020-10-26 20:46:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39289 states. [2020-10-26 20:46:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39289 states to 39289 states and 50419 transitions. [2020-10-26 20:46:39,765 INFO L78 Accepts]: Start accepts. Automaton has 39289 states and 50419 transitions. Word has length 229 [2020-10-26 20:46:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:39,766 INFO L481 AbstractCegarLoop]: Abstraction has 39289 states and 50419 transitions. [2020-10-26 20:46:39,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 39289 states and 50419 transitions. [2020-10-26 20:46:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-26 20:46:39,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:39,786 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:39,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:46:39,787 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 131356715, now seen corresponding path program 1 times [2020-10-26 20:46:39,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:39,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729928583] [2020-10-26 20:46:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:39,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:39,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:42,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:44,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:44,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 20:46:44,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:44,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 20:46:44,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:44,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:46:44,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:44,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:46:44,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:45,183 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:45,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:45,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:45,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:45,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:45,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:45,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:46:45,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:45,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:45,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:45,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:45,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:45,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:45,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:45,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:45,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 20:46:45,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:45,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:45,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:45,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:46:45,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:45,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:46:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:45,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:46:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:45,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:46:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:45,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:45,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:45,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:46:45,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:46:45,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:46:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 63 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 20:46:45,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729928583] [2020-10-26 20:46:45,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:45,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:46:45,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613412026] [2020-10-26 20:46:45,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:46:45,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:45,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:46:45,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:46:45,673 INFO L87 Difference]: Start difference. First operand 39289 states and 50419 transitions. Second operand 10 states. [2020-10-26 20:46:45,964 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:46,380 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:47,098 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 160 [2020-10-26 20:46:51,345 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:46:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:54,090 INFO L93 Difference]: Finished difference Result 90691 states and 116909 transitions. [2020-10-26 20:46:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 20:46:54,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 232 [2020-10-26 20:46:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:54,403 INFO L225 Difference]: With dead ends: 90691 [2020-10-26 20:46:54,403 INFO L226 Difference]: Without dead ends: 51523 [2020-10-26 20:46:54,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:46:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51523 states. [2020-10-26 20:46:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51523 to 51161. [2020-10-26 20:46:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51161 states. [2020-10-26 20:46:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51161 states to 51161 states and 65573 transitions. [2020-10-26 20:46:55,530 INFO L78 Accepts]: Start accepts. Automaton has 51161 states and 65573 transitions. Word has length 232 [2020-10-26 20:46:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:55,531 INFO L481 AbstractCegarLoop]: Abstraction has 51161 states and 65573 transitions. [2020-10-26 20:46:55,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:46:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 51161 states and 65573 transitions. [2020-10-26 20:46:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 20:46:55,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:55,574 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:55,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:46:55,574 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:55,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:55,575 INFO L82 PathProgramCache]: Analyzing trace with hash -690722063, now seen corresponding path program 1 times [2020-10-26 20:46:55,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:55,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368222555] [2020-10-26 20:46:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:57,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:00,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:00,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-26 20:47:00,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:00,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4873 [2020-10-26 20:47:00,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:00,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:00,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:00,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:47:00,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:00,849 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:00,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:00,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:00,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:00,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:00,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:00,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:47:00,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:00,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:00,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:00,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:00,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:00,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:00,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:00,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:00,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:00,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:00,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:47:01,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:01,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:01,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:01,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:01,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:01,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:47:01,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 20:47:01,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:01,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:47:01,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:01,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 20:47:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:01,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:01,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:01,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:47:01,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:01,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:47:01,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:47:01,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:01,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 85 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:47:01,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368222555] [2020-10-26 20:47:01,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:01,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:01,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904385252] [2020-10-26 20:47:01,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:01,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:01,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:01,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:01,451 INFO L87 Difference]: Start difference. First operand 51161 states and 65573 transitions. Second operand 8 states. [2020-10-26 20:47:01,725 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:03,824 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:06,169 INFO L93 Difference]: Finished difference Result 106197 states and 140106 transitions. [2020-10-26 20:47:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:47:06,170 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 261 [2020-10-26 20:47:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:06,385 INFO L225 Difference]: With dead ends: 106197 [2020-10-26 20:47:06,385 INFO L226 Difference]: Without dead ends: 59475 [2020-10-26 20:47:06,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:47:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59475 states. [2020-10-26 20:47:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59475 to 58624. [2020-10-26 20:47:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58624 states. [2020-10-26 20:47:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58624 states to 58624 states and 74826 transitions. [2020-10-26 20:47:08,568 INFO L78 Accepts]: Start accepts. Automaton has 58624 states and 74826 transitions. Word has length 261 [2020-10-26 20:47:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:08,568 INFO L481 AbstractCegarLoop]: Abstraction has 58624 states and 74826 transitions. [2020-10-26 20:47:08,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 58624 states and 74826 transitions. [2020-10-26 20:47:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-26 20:47:08,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:08,617 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:08,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:47:08,620 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash 901387559, now seen corresponding path program 1 times [2020-10-26 20:47:08,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:08,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881645778] [2020-10-26 20:47:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:08,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:11,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:13,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:13,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 20:47:13,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:13,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 20:47:13,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:13,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:13,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 20:47:13,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:13,992 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:13,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:14,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:14,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:47:14,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 20:47:14,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:14,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:14,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:47:14,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:47:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:47:14,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:47:14,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-26 20:47:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:14,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-26 20:47:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:14,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:14,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:47:14,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:14,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:47:14,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:47:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:14,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 95 proven. 57 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 20:47:14,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881645778] [2020-10-26 20:47:14,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:14,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:14,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12447782] [2020-10-26 20:47:14,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:14,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:14,612 INFO L87 Difference]: Start difference. First operand 58624 states and 74826 transitions. Second operand 8 states. [2020-10-26 20:47:14,911 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:16,292 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:47:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:20,203 INFO L93 Difference]: Finished difference Result 127866 states and 165435 transitions. [2020-10-26 20:47:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:47:20,203 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 270 [2020-10-26 20:47:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:20,390 INFO L225 Difference]: With dead ends: 127866 [2020-10-26 20:47:20,390 INFO L226 Difference]: Without dead ends: 73496 [2020-10-26 20:47:20,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:47:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73496 states. [2020-10-26 20:47:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73496 to 72960. [2020-10-26 20:47:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72960 states. [2020-10-26 20:47:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72960 states to 72960 states and 93032 transitions. [2020-10-26 20:47:22,211 INFO L78 Accepts]: Start accepts. Automaton has 72960 states and 93032 transitions. Word has length 270 [2020-10-26 20:47:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:22,212 INFO L481 AbstractCegarLoop]: Abstraction has 72960 states and 93032 transitions. [2020-10-26 20:47:22,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 72960 states and 93032 transitions. [2020-10-26 20:47:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-26 20:47:22,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:22,246 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:22,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:47:22,247 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash -848332691, now seen corresponding path program 1 times [2020-10-26 20:47:22,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:22,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303081040] [2020-10-26 20:47:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:22,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:22,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:25,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:27,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:27,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-26 20:47:27,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 20:47:27,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:47:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,063 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:28,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:28,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:47:28,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:28,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:28,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:28,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:28,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:47:28,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:28,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:47:28,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 20:47:28,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:47:28,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 20:47:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:28,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 103 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:47:28,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303081040] [2020-10-26 20:47:28,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:28,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:28,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556159297] [2020-10-26 20:47:28,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:28,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:28,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:28,674 INFO L87 Difference]: Start difference. First operand 72960 states and 93032 transitions. Second operand 8 states. [2020-10-26 20:47:28,964 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:30,107 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:33,428 INFO L93 Difference]: Finished difference Result 184007 states and 236921 transitions. [2020-10-26 20:47:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:47:33,429 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 279 [2020-10-26 20:47:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:33,918 INFO L225 Difference]: With dead ends: 184007 [2020-10-26 20:47:33,918 INFO L226 Difference]: Without dead ends: 114331 [2020-10-26 20:47:33,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:47:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114331 states. [2020-10-26 20:47:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114331 to 114013. [2020-10-26 20:47:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114013 states. [2020-10-26 20:47:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114013 states to 114013 states and 143828 transitions. [2020-10-26 20:47:36,990 INFO L78 Accepts]: Start accepts. Automaton has 114013 states and 143828 transitions. Word has length 279 [2020-10-26 20:47:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:36,993 INFO L481 AbstractCegarLoop]: Abstraction has 114013 states and 143828 transitions. [2020-10-26 20:47:36,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 114013 states and 143828 transitions. [2020-10-26 20:47:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-26 20:47:37,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:37,059 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:37,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:47:37,060 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1887513063, now seen corresponding path program 1 times [2020-10-26 20:47:37,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:37,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545064353] [2020-10-26 20:47:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:37,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:38,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:40,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:40,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-26 20:47:40,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3520 [2020-10-26 20:47:40,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:47:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:47:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:40,955 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:40,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:40,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:40,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:40,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:40,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:40,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:47:40,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:40,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:40,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:40,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:40,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:41,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:41,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:41,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:41,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:47:41,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:41,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 20:47:41,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:41,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:47:41,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:41,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:47:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:41,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:41,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:41,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:47:41,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:41,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-26 20:47:41,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:47:41,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:41,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-26 20:47:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:41,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:41,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:41,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:47:41,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:41,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:47:41,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:41,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:41,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:47:41,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:41,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 130 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:47:41,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545064353] [2020-10-26 20:47:41,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:41,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:41,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699076975] [2020-10-26 20:47:41,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:47:41,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:41,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:47:41,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:47:41,530 INFO L87 Difference]: Start difference. First operand 114013 states and 143828 transitions. Second operand 8 states. [2020-10-26 20:47:41,803 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:47:42,257 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:43,464 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:49,362 INFO L93 Difference]: Finished difference Result 334559 states and 418992 transitions. [2020-10-26 20:47:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:47:49,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 289 [2020-10-26 20:47:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:50,210 INFO L225 Difference]: With dead ends: 334559 [2020-10-26 20:47:50,210 INFO L226 Difference]: Without dead ends: 221713 [2020-10-26 20:47:50,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:47:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221713 states. [2020-10-26 20:47:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221713 to 220795. [2020-10-26 20:47:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220795 states. [2020-10-26 20:47:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220795 states to 220795 states and 267179 transitions. [2020-10-26 20:47:55,281 INFO L78 Accepts]: Start accepts. Automaton has 220795 states and 267179 transitions. Word has length 289 [2020-10-26 20:47:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:55,281 INFO L481 AbstractCegarLoop]: Abstraction has 220795 states and 267179 transitions. [2020-10-26 20:47:55,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:47:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 220795 states and 267179 transitions. [2020-10-26 20:47:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-26 20:47:55,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:55,380 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:55,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:47:55,381 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1641622314, now seen corresponding path program 1 times [2020-10-26 20:47:55,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:55,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052822368] [2020-10-26 20:47:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:55,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:56,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:00,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:00,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-26 20:48:00,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:48:00,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 20:48:00,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:48:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:00,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 20:48:00,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,823 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:00,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:00,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:00,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:00,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:00,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:00,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:48:00,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:00,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:00,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:00,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:00,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:01,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:01,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:48:01,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:01,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 20:48:01,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:01,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:01,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:01,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:48:01,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:48:01,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:48:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:01,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:48:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:01,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 20:48:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:01,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:01,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:01,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 20:48:01,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:01,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-26 20:48:01,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:01,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:01,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:01,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 20:48:01,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 115 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 20:48:01,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052822368] [2020-10-26 20:48:01,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:01,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:48:01,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816830260] [2020-10-26 20:48:01,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 20:48:01,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 20:48:01,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:48:01,913 INFO L87 Difference]: Start difference. First operand 220795 states and 267179 transitions. Second operand 11 states. [2020-10-26 20:48:02,240 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:48:02,881 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:48:04,373 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:48:07,101 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 171 [2020-10-26 20:48:07,283 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-26 20:48:08,675 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 163 [2020-10-26 20:48:09,037 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 20:48:10,993 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 165