/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/Problem13_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:07:56,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:07:56,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:07:56,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:07:56,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:07:56,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:07:56,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:07:56,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:07:56,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:07:56,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:07:56,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:07:56,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:07:56,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:07:56,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:07:56,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:07:56,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:07:56,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:07:56,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:07:56,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:07:56,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:07:56,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:07:56,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:07:56,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:07:56,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:07:56,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:07:56,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:07:56,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:07:56,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:07:56,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:07:56,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:07:56,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:07:56,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:07:56,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:07:56,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:07:56,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:07:56,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:07:56,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:07:56,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:07:56,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:07:56,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:07:56,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:07:56,859 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 23:07:56,916 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:07:56,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:07:56,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:07:56,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:07:56,923 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:07:56,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:07:56,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:07:56,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:07:56,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:07:56,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:07:56,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:07:56,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:07:56,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:07:56,925 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:07:56,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:07:56,926 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:07:56,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:07:56,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:07:56,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:07:56,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:07:56,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:07:56,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:07:56,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:07:56,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:07:56,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:07:56,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:07:56,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:07:56,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:07:56,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:07:56,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:07:57,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:07:57,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:07:57,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:07:57,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:07:57,397 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:07:57,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label21.c [2020-10-26 23:07:57,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6dd26cb/c179fad8f215472faab98262d991f444/FLAGf0112c326 [2020-10-26 23:07:58,663 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:07:58,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label21.c [2020-10-26 23:07:58,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6dd26cb/c179fad8f215472faab98262d991f444/FLAGf0112c326 [2020-10-26 23:07:59,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6dd26cb/c179fad8f215472faab98262d991f444 [2020-10-26 23:07:59,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:07:59,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:07:59,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:07:59,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:07:59,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:07:59,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:07:59" (1/1) ... [2020-10-26 23:07:59,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe8493e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:07:59, skipping insertion in model container [2020-10-26 23:07:59,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:07:59" (1/1) ... [2020-10-26 23:07:59,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:07:59,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:08:00,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:08:00,895 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:08:01,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:08:01,738 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:08:01,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01 WrapperNode [2020-10-26 23:08:01,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:08:01,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:08:01,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:08:01,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:08:01,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (1/1) ... [2020-10-26 23:08:01,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (1/1) ... [2020-10-26 23:08:01,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (1/1) ... [2020-10-26 23:08:01,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (1/1) ... [2020-10-26 23:08:01,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (1/1) ... [2020-10-26 23:08:02,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (1/1) ... [2020-10-26 23:08:02,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (1/1) ... [2020-10-26 23:08:02,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:08:02,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:08:02,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:08:02,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:08:02,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (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 23:08:02,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:08:02,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:08:02,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:08:02,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:08:02,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:08:02,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:08:02,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:08:02,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:08:02,334 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:08:02,334 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:08:02,334 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:08:02,334 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:08:02,334 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:08:02,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:08:02,335 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:08:02,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:08:02,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:08:02,335 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:08:02,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:08:02,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:08:02,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:08:02,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:08:02,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:08:02,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:08:02,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:08:12,500 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:08:12,501 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:08:12,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:08:12 BoogieIcfgContainer [2020-10-26 23:08:12,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:08:12,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:08:12,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:08:12,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:08:12,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:07:59" (1/3) ... [2020-10-26 23:08:12,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b6becc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:08:12, skipping insertion in model container [2020-10-26 23:08:12,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:08:01" (2/3) ... [2020-10-26 23:08:12,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b6becc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:08:12, skipping insertion in model container [2020-10-26 23:08:12,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:08:12" (3/3) ... [2020-10-26 23:08:12,516 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label21.c [2020-10-26 23:08:12,529 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:08:12,536 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:08:12,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:08:12,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:08:12,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:08:12,590 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:08:12,591 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:08:12,591 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:08:12,591 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:08:12,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:08:12,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:08:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:08:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 23:08:12,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:12,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:08:12,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:12,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1753784126, now seen corresponding path program 1 times [2020-10-26 23:08:12,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:12,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169540501] [2020-10-26 23:08:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:12,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:13,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:13,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 23:08:13,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:13,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-26 23:08:13,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:13,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:08:13,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:13,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 23:08:13,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:08:13,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:13,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:13,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:13,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:13,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:13,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 23:08:13,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:13,549 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 23:08:13,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169540501] [2020-10-26 23:08:13,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:08:13,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:08:13,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84216538] [2020-10-26 23:08:13,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:08:13,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:13,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:08:13,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:08:13,577 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:08:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:32,338 INFO L93 Difference]: Finished difference Result 3157 states and 5837 transitions. [2020-10-26 23:08:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:08:32,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 23:08:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:32,377 INFO L225 Difference]: With dead ends: 3157 [2020-10-26 23:08:32,377 INFO L226 Difference]: Without dead ends: 1955 [2020-10-26 23:08:32,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:08:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2020-10-26 23:08:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1886. [2020-10-26 23:08:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-26 23:08:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3104 transitions. [2020-10-26 23:08:32,580 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3104 transitions. Word has length 27 [2020-10-26 23:08:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:32,581 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 3104 transitions. [2020-10-26 23:08:32,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:08:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3104 transitions. [2020-10-26 23:08:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 23:08:32,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:32,593 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:08:32,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:08:32,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1154706635, now seen corresponding path program 1 times [2020-10-26 23:08:32,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:32,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708498975] [2020-10-26 23:08:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:32,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:33,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:34,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:34,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 23:08:34,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:08:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1590 [2020-10-26 23:08:34,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:08:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:08:34,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:08:34,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:34,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:34,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:34,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:34,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:34,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 23:08:34,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:34,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:34,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:34,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:34,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:08:34,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:08:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:34,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:34,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:34,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:08:34,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:34,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 23:08:34,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:34,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:08:34,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:08:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:08:34,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708498975] [2020-10-26 23:08:34,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:08:34,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:08:34,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305605599] [2020-10-26 23:08:34,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:08:34,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:34,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:08:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:08:34,867 INFO L87 Difference]: Start difference. First operand 1886 states and 3104 transitions. Second operand 7 states. [2020-10-26 23:09:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:00,767 INFO L93 Difference]: Finished difference Result 5679 states and 9344 transitions. [2020-10-26 23:09:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:09:00,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-26 23:09:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:00,799 INFO L225 Difference]: With dead ends: 5679 [2020-10-26 23:09:00,799 INFO L226 Difference]: Without dead ends: 3799 [2020-10-26 23:09:00,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2020-10-26 23:09:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3699. [2020-10-26 23:09:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3699 states. [2020-10-26 23:09:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5553 transitions. [2020-10-26 23:09:01,031 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5553 transitions. Word has length 97 [2020-10-26 23:09:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:01,032 INFO L481 AbstractCegarLoop]: Abstraction has 3699 states and 5553 transitions. [2020-10-26 23:09:01,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5553 transitions. [2020-10-26 23:09:01,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 23:09:01,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:01,045 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:09:01,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:09:01,046 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:01,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1044152759, now seen corresponding path program 1 times [2020-10-26 23:09:01,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:01,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122587568] [2020-10-26 23:09:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:01,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:01,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:02,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:02,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 23:09:02,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:02,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 904 [2020-10-26 23:09:02,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:09:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:09:02,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:02,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:02,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:02,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:02,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:02,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:02,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:09:02,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:02,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:02,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:02,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:02,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:02,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:02,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:09:02,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:02,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-26 23:09:02,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:02,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:02,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:09:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:09:02,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122587568] [2020-10-26 23:09:02,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:09:02,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:09:02,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018839685] [2020-10-26 23:09:02,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:09:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:09:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:09:02,454 INFO L87 Difference]: Start difference. First operand 3699 states and 5553 transitions. Second operand 7 states. [2020-10-26 23:09:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:28,270 INFO L93 Difference]: Finished difference Result 8420 states and 13054 transitions. [2020-10-26 23:09:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:09:28,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-26 23:09:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:28,310 INFO L225 Difference]: With dead ends: 8420 [2020-10-26 23:09:28,310 INFO L226 Difference]: Without dead ends: 4727 [2020-10-26 23:09:28,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:09:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2020-10-26 23:09:28,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4539. [2020-10-26 23:09:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4539 states. [2020-10-26 23:09:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 6159 transitions. [2020-10-26 23:09:28,504 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 6159 transitions. Word has length 102 [2020-10-26 23:09:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:28,505 INFO L481 AbstractCegarLoop]: Abstraction has 4539 states and 6159 transitions. [2020-10-26 23:09:28,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 6159 transitions. [2020-10-26 23:09:28,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 23:09:28,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:28,508 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:09:28,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:09:28,508 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash -779508179, now seen corresponding path program 1 times [2020-10-26 23:09:28,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:28,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963272852] [2020-10-26 23:09:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:28,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:28,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:29,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:29,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:09:29,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:29,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-26 23:09:29,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:29,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:09:29,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:29,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:09:29,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:29,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:29,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:29,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:29,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:29,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 23:09:29,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:29,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:09:29,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:29,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:30,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:30,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:09:30,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:30,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-26 23:09:30,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:30,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:09:30,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:09:30,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963272852] [2020-10-26 23:09:30,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:09:30,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:09:30,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246006913] [2020-10-26 23:09:30,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:09:30,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:09:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:09:30,327 INFO L87 Difference]: Start difference. First operand 4539 states and 6159 transitions. Second operand 7 states. [2020-10-26 23:09:55,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:55,987 INFO L93 Difference]: Finished difference Result 12089 states and 16994 transitions. [2020-10-26 23:09:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:09:55,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-26 23:09:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:56,034 INFO L225 Difference]: With dead ends: 12089 [2020-10-26 23:09:56,034 INFO L226 Difference]: Without dead ends: 7556 [2020-10-26 23:09:56,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7556 states. [2020-10-26 23:09:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7556 to 7257. [2020-10-26 23:09:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7257 states. [2020-10-26 23:09:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7257 states to 7257 states and 9306 transitions. [2020-10-26 23:09:56,282 INFO L78 Accepts]: Start accepts. Automaton has 7257 states and 9306 transitions. Word has length 104 [2020-10-26 23:09:56,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:56,282 INFO L481 AbstractCegarLoop]: Abstraction has 7257 states and 9306 transitions. [2020-10-26 23:09:56,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 7257 states and 9306 transitions. [2020-10-26 23:09:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-26 23:09:56,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:56,287 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:09:56,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:09:56,287 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash -152377764, now seen corresponding path program 1 times [2020-10-26 23:09:56,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:56,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272560490] [2020-10-26 23:09:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:56,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:56,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:56,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 23:09:56,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:56,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-26 23:09:56,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:56,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:56,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:09:56,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 23:09:56,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:56,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:56,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:56,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:56,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:56,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:56,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:09:56,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:56,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:09:56,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:56,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:09:56,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:57,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:57,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:57,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:57,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:09:57,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:57,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-26 23:09:57,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:57,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:09:57,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:09:57,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272560490] [2020-10-26 23:09:57,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:09:57,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:09:57,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115238669] [2020-10-26 23:09:57,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:09:57,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:57,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:09:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:09:57,324 INFO L87 Difference]: Start difference. First operand 7257 states and 9306 transitions. Second operand 5 states. [2020-10-26 23:10:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:10:20,931 INFO L93 Difference]: Finished difference Result 13611 states and 17719 transitions. [2020-10-26 23:10:20,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:10:20,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-26 23:10:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:10:20,987 INFO L225 Difference]: With dead ends: 13611 [2020-10-26 23:10:20,988 INFO L226 Difference]: Without dead ends: 7163 [2020-10-26 23:10:21,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:10:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2020-10-26 23:10:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 7108. [2020-10-26 23:10:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7108 states. [2020-10-26 23:10:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7108 states to 7108 states and 8490 transitions. [2020-10-26 23:10:21,250 INFO L78 Accepts]: Start accepts. Automaton has 7108 states and 8490 transitions. Word has length 156 [2020-10-26 23:10:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:10:21,253 INFO L481 AbstractCegarLoop]: Abstraction has 7108 states and 8490 transitions. [2020-10-26 23:10:21,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:10:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 7108 states and 8490 transitions. [2020-10-26 23:10:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 23:10:21,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:21,258 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 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] [2020-10-26 23:10:21,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:10:21,258 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:21,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2130951486, now seen corresponding path program 1 times [2020-10-26 23:10:21,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:21,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403571674] [2020-10-26 23:10:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:21,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:21,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:22,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:25,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:25,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-26 23:10:25,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:10:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4332 [2020-10-26 23:10:25,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:10:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:10:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:10:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:25,842 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:10:25,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:25,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:25,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:25,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:25,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:25,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:10:25,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:25,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:25,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:10:25,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:25,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:10:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:26,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:26,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:10:26,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:26,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-26 23:10:26,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:26,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:26,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:26,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:10:26,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:26,331 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2020-10-26 23:10:26,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:10:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:26,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:26,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:26,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:10:26,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 23:10:26,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:10:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-26 23:10:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:10:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:10:26,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403571674] [2020-10-26 23:10:26,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:10:26,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:10:26,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778936433] [2020-10-26 23:10:26,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:10:26,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:26,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:10:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:10:26,702 INFO L87 Difference]: Start difference. First operand 7108 states and 8490 transitions. Second operand 7 states. [2020-10-26 23:10:26,856 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:10:28,542 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:10:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:10:50,734 INFO L93 Difference]: Finished difference Result 13736 states and 16547 transitions. [2020-10-26 23:10:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:10:50,741 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 197 [2020-10-26 23:10:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:10:50,765 INFO L225 Difference]: With dead ends: 13736 [2020-10-26 23:10:50,765 INFO L226 Difference]: Without dead ends: 7437 [2020-10-26 23:10:50,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:10:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2020-10-26 23:10:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7163. [2020-10-26 23:10:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7163 states. [2020-10-26 23:10:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7163 states to 7163 states and 8560 transitions. [2020-10-26 23:10:51,009 INFO L78 Accepts]: Start accepts. Automaton has 7163 states and 8560 transitions. Word has length 197 [2020-10-26 23:10:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:10:51,009 INFO L481 AbstractCegarLoop]: Abstraction has 7163 states and 8560 transitions. [2020-10-26 23:10:51,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:10:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7163 states and 8560 transitions. [2020-10-26 23:10:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-26 23:10:51,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:10:51,014 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 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] [2020-10-26 23:10:51,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:10:51,014 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:10:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:10:51,016 INFO L82 PathProgramCache]: Analyzing trace with hash -963779639, now seen corresponding path program 1 times [2020-10-26 23:10:51,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:10:51,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367167179] [2020-10-26 23:10:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:10:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:51,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:51,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:52,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-26 23:10:52,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:10:52,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-26 23:10:52,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:10:52,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:10:52,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:52,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:10:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:52,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:10:52,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:52,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:10:52,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:52,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:10:52,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:52,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:10:52,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:52,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:10:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:52,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:52,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:10:52,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:52,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 23:10:52,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:52,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:10:52,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:10:52,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:10:52,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:52,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:10:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:10:52,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:10:52,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:10:52,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 23:10:52,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:10:52,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-26 23:10:52,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:10:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:10:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:10:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:10:52,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:10:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:10:53,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367167179] [2020-10-26 23:10:53,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:10:53,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:10:53,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546756398] [2020-10-26 23:10:53,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:10:53,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:10:53,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:10:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:10:53,147 INFO L87 Difference]: Start difference. First operand 7163 states and 8560 transitions. Second operand 7 states. [2020-10-26 23:10:53,322 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:10:57,522 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:11:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:20,753 INFO L93 Difference]: Finished difference Result 17416 states and 21618 transitions. [2020-10-26 23:11:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:11:20,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 204 [2020-10-26 23:11:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:20,797 INFO L225 Difference]: With dead ends: 17416 [2020-10-26 23:11:20,797 INFO L226 Difference]: Without dead ends: 11062 [2020-10-26 23:11:20,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:11:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2020-10-26 23:11:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 10661. [2020-10-26 23:11:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10661 states. [2020-10-26 23:11:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10661 states to 10661 states and 12758 transitions. [2020-10-26 23:11:21,062 INFO L78 Accepts]: Start accepts. Automaton has 10661 states and 12758 transitions. Word has length 204 [2020-10-26 23:11:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:21,063 INFO L481 AbstractCegarLoop]: Abstraction has 10661 states and 12758 transitions. [2020-10-26 23:11:21,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:11:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 10661 states and 12758 transitions. [2020-10-26 23:11:21,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-26 23:11:21,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:21,069 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 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] [2020-10-26 23:11:21,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:11:21,069 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:21,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1972679131, now seen corresponding path program 1 times [2020-10-26 23:11:21,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:21,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894875955] [2020-10-26 23:11:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:21,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:21,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:24,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:24,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-26 23:11:24,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:11:24,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2873 [2020-10-26 23:11:24,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:11:24,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 23:11:24,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:24,325 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:11:24,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:11:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:24,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:24,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:11:24,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:24,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:11:24,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:24,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:11:24,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:24,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:11:24,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:24,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:11:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:24,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:24,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:24,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:11:24,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:11:24,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-26 23:11:24,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:24,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:11:24,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:11:24,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:11:24,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:11:24,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:11:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:24,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:25,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:11:25,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 23:11:25,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:11:25,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-26 23:11:25,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:11:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:11:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:11:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 23:11:25,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:11:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:11:25,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894875955] [2020-10-26 23:11:25,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:11:25,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:11:25,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046621588] [2020-10-26 23:11:25,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:11:25,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:11:25,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:11:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:11:25,235 INFO L87 Difference]: Start difference. First operand 10661 states and 12758 transitions. Second operand 7 states. [2020-10-26 23:11:26,700 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-26 23:11:28,687 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:11:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:11:50,403 INFO L93 Difference]: Finished difference Result 17108 states and 21083 transitions. [2020-10-26 23:11:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:11:50,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 246 [2020-10-26 23:11:50,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:11:50,438 INFO L225 Difference]: With dead ends: 17108 [2020-10-26 23:11:50,439 INFO L226 Difference]: Without dead ends: 11315 [2020-10-26 23:11:50,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:11:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2020-10-26 23:11:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 10668. [2020-10-26 23:11:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10668 states. [2020-10-26 23:11:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10668 states to 10668 states and 12762 transitions. [2020-10-26 23:11:50,712 INFO L78 Accepts]: Start accepts. Automaton has 10668 states and 12762 transitions. Word has length 246 [2020-10-26 23:11:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:11:50,713 INFO L481 AbstractCegarLoop]: Abstraction has 10668 states and 12762 transitions. [2020-10-26 23:11:50,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:11:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10668 states and 12762 transitions. [2020-10-26 23:11:50,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-26 23:11:50,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:11:50,719 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 23:11:50,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:11:50,720 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:11:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:11:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash -538666330, now seen corresponding path program 1 times [2020-10-26 23:11:50,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:11:50,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171642360] [2020-10-26 23:11:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:11:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:11:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:50,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:11:52,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking...