/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:05:15,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:05:15,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:05:15,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:05:15,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:05:15,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:05:15,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:05:15,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:05:15,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:05:15,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:05:15,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:05:15,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:05:15,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:05:15,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:05:15,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:05:15,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:05:15,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:05:15,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:05:15,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:05:15,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:05:15,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:05:15,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:05:15,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:05:15,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:05:15,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:05:15,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:05:15,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:05:15,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:05:15,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 19:05:15,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:05:15,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:05:15,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:05:15,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:05:15,865 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:05:15,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:05:15,865 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:05:15,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:05:15,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:05:15,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:05:15,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:05:15,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:05:15,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:05:15,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:05:15,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:05:15,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:05:15,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:05:15,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:05:15,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:05:15,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:05:15,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:05:15,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:05:15,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:05:15,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:05:15,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:05:15,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:05:15,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:05:15,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:05:15,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:05:15,871 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:05:16,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:05:16,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:05:16,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:05:16,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:05:16,306 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:05:16,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-23 19:05:16,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38a3c11a/bb313e08a03d43419dca2265dc3006e0/FLAG2e9072c4d [2020-10-23 19:05:17,355 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:05:17,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-23 19:05:17,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38a3c11a/bb313e08a03d43419dca2265dc3006e0/FLAG2e9072c4d [2020-10-23 19:05:17,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38a3c11a/bb313e08a03d43419dca2265dc3006e0 [2020-10-23 19:05:17,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:05:17,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:05:17,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:05:17,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:05:17,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:05:17,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:05:17" (1/1) ... [2020-10-23 19:05:17,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5828a90f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:17, skipping insertion in model container [2020-10-23 19:05:17,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:05:17" (1/1) ... [2020-10-23 19:05:17,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:05:17,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:05:19,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:05:19,236 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:05:20,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:05:20,263 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:05:20,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20 WrapperNode [2020-10-23 19:05:20,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:05:20,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:05:20,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:05:20,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:05:20,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (1/1) ... [2020-10-23 19:05:20,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (1/1) ... [2020-10-23 19:05:20,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (1/1) ... [2020-10-23 19:05:20,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (1/1) ... [2020-10-23 19:05:20,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (1/1) ... [2020-10-23 19:05:20,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (1/1) ... [2020-10-23 19:05:20,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (1/1) ... [2020-10-23 19:05:20,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:05:20,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:05:20,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:05:20,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:05:20,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 19:05:20,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:05:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:05:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:05:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:05:20,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:05:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:05:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:05:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:05:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:05:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:05:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:05:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:05:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:05:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:05:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:05:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:05:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:05:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:05:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:05:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-23 19:05:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:05:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:05:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:05:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:05:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:05:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:05:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:05:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:05:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:05:25,842 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:05:25,843 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:05:25,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:05:25 BoogieIcfgContainer [2020-10-23 19:05:25,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:05:25,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:05:25,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:05:25,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:05:25,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:05:17" (1/3) ... [2020-10-23 19:05:25,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc063b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:05:25, skipping insertion in model container [2020-10-23 19:05:25,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:20" (2/3) ... [2020-10-23 19:05:25,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc063b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:05:25, skipping insertion in model container [2020-10-23 19:05:25,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:05:25" (3/3) ... [2020-10-23 19:05:25,856 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-23 19:05:25,868 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:05:25,874 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:05:25,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:05:25,923 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:05:25,923 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:05:25,923 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:05:25,923 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:05:25,923 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:05:25,924 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:05:25,924 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:05:25,924 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:05:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states. [2020-10-23 19:05:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-23 19:05:26,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:26,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:26,014 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:26,029 INFO L82 PathProgramCache]: Analyzing trace with hash -937803504, now seen corresponding path program 1 times [2020-10-23 19:05:26,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:26,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400298960] [2020-10-23 19:05:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:30,723 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:05:30,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:31,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400298960] [2020-10-23 19:05:31,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:31,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:05:31,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284584349] [2020-10-23 19:05:31,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:05:31,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:05:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:31,561 INFO L87 Difference]: Start difference. First operand 1435 states. Second operand 5 states. [2020-10-23 19:05:48,429 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:05:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:51,861 INFO L93 Difference]: Finished difference Result 4242 states and 7640 transitions. [2020-10-23 19:05:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 19:05:51,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-10-23 19:05:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:51,921 INFO L225 Difference]: With dead ends: 4242 [2020-10-23 19:05:51,921 INFO L226 Difference]: Without dead ends: 2816 [2020-10-23 19:05:51,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:05:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2020-10-23 19:05:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2813. [2020-10-23 19:05:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2813 states. [2020-10-23 19:05:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 4640 transitions. [2020-10-23 19:05:52,215 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 4640 transitions. Word has length 488 [2020-10-23 19:05:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:52,222 INFO L481 AbstractCegarLoop]: Abstraction has 2813 states and 4640 transitions. [2020-10-23 19:05:52,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:05:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 4640 transitions. [2020-10-23 19:05:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-10-23 19:05:52,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:52,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:52,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:05:52,251 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash 863774800, now seen corresponding path program 1 times [2020-10-23 19:05:52,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:52,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692368226] [2020-10-23 19:05:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:54,039 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:05:54,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:54,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692368226] [2020-10-23 19:05:54,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:54,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64053543] [2020-10-23 19:05:54,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:54,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:54,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:54,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:54,476 INFO L87 Difference]: Start difference. First operand 2813 states and 4640 transitions. Second operand 4 states. [2020-10-23 19:06:14,280 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-23 19:06:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:17,506 INFO L93 Difference]: Finished difference Result 8161 states and 13425 transitions. [2020-10-23 19:06:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:06:17,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-10-23 19:06:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:17,546 INFO L225 Difference]: With dead ends: 8161 [2020-10-23 19:06:17,546 INFO L226 Difference]: Without dead ends: 5562 [2020-10-23 19:06:17,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:06:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5562 states. [2020-10-23 19:06:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5562 to 5559. [2020-10-23 19:06:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5559 states. [2020-10-23 19:06:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 9142 transitions. [2020-10-23 19:06:17,811 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 9142 transitions. Word has length 490 [2020-10-23 19:06:17,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:17,815 INFO L481 AbstractCegarLoop]: Abstraction has 5559 states and 9142 transitions. [2020-10-23 19:06:17,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 9142 transitions. [2020-10-23 19:06:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-23 19:06:17,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:17,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:17,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:06:17,838 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:17,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2034879086, now seen corresponding path program 1 times [2020-10-23 19:06:17,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:17,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071037445] [2020-10-23 19:06:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:19,348 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:06:19,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:06:19,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071037445] [2020-10-23 19:06:19,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:19,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:19,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114462418] [2020-10-23 19:06:19,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:19,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:19,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:19,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:19,610 INFO L87 Difference]: Start difference. First operand 5559 states and 9142 transitions. Second operand 4 states. [2020-10-23 19:06:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:41,316 INFO L93 Difference]: Finished difference Result 16578 states and 27257 transitions. [2020-10-23 19:06:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:06:41,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-10-23 19:06:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:41,378 INFO L225 Difference]: With dead ends: 16578 [2020-10-23 19:06:41,378 INFO L226 Difference]: Without dead ends: 11071 [2020-10-23 19:06:41,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2020-10-23 19:06:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5606. [2020-10-23 19:06:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5606 states. [2020-10-23 19:06:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5606 states to 5606 states and 9216 transitions. [2020-10-23 19:06:41,717 INFO L78 Accepts]: Start accepts. Automaton has 5606 states and 9216 transitions. Word has length 491 [2020-10-23 19:06:41,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:41,718 INFO L481 AbstractCegarLoop]: Abstraction has 5606 states and 9216 transitions. [2020-10-23 19:06:41,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5606 states and 9216 transitions. [2020-10-23 19:06:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-10-23 19:06:41,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:41,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:41,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:06:41,736 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1868208885, now seen corresponding path program 1 times [2020-10-23 19:06:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:41,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994978092] [2020-10-23 19:06:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:43,437 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:06:43,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:06:43,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994978092] [2020-10-23 19:06:43,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:43,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:43,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782816334] [2020-10-23 19:06:43,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:43,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:43,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:43,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:43,784 INFO L87 Difference]: Start difference. First operand 5606 states and 9216 transitions. Second operand 4 states. [2020-10-23 19:07:03,008 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-23 19:07:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:06,587 INFO L93 Difference]: Finished difference Result 16143 states and 26447 transitions. [2020-10-23 19:07:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:07:06,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-10-23 19:07:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:06,637 INFO L225 Difference]: With dead ends: 16143 [2020-10-23 19:07:06,637 INFO L226 Difference]: Without dead ends: 10936 [2020-10-23 19:07:06,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:07:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10936 states. [2020-10-23 19:07:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10936 to 10933. [2020-10-23 19:07:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10933 states. [2020-10-23 19:07:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10933 states to 10933 states and 17886 transitions. [2020-10-23 19:07:07,167 INFO L78 Accepts]: Start accepts. Automaton has 10933 states and 17886 transitions. Word has length 492 [2020-10-23 19:07:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:07,168 INFO L481 AbstractCegarLoop]: Abstraction has 10933 states and 17886 transitions. [2020-10-23 19:07:07,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 10933 states and 17886 transitions. [2020-10-23 19:07:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-10-23 19:07:07,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:07,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:07,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:07:07,195 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:07,196 INFO L82 PathProgramCache]: Analyzing trace with hash -825376240, now seen corresponding path program 1 times [2020-10-23 19:07:07,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:07,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251573512] [2020-10-23 19:07:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:08,710 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:07:08,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:08,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251573512] [2020-10-23 19:07:08,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:08,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413567740] [2020-10-23 19:07:08,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:08,969 INFO L87 Difference]: Start difference. First operand 10933 states and 17886 transitions. Second operand 4 states. [2020-10-23 19:07:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:31,590 INFO L93 Difference]: Finished difference Result 32541 states and 53212 transitions. [2020-10-23 19:07:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:07:31,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-10-23 19:07:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:31,639 INFO L225 Difference]: With dead ends: 32541 [2020-10-23 19:07:31,639 INFO L226 Difference]: Without dead ends: 21752 [2020-10-23 19:07:31,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21752 states. [2020-10-23 19:07:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 11031. [2020-10-23 19:07:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11031 states. [2020-10-23 19:07:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 18037 transitions. [2020-10-23 19:07:32,314 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 18037 transitions. Word has length 492 [2020-10-23 19:07:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:32,314 INFO L481 AbstractCegarLoop]: Abstraction has 11031 states and 18037 transitions. [2020-10-23 19:07:32,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 18037 transitions. [2020-10-23 19:07:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-23 19:07:32,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:32,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:32,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:07:32,344 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 542445507, now seen corresponding path program 1 times [2020-10-23 19:07:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:32,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013383618] [2020-10-23 19:07:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:33,872 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:07:33,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:34,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013383618] [2020-10-23 19:07:34,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:34,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:34,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172571585] [2020-10-23 19:07:34,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:34,188 INFO L87 Difference]: Start difference. First operand 11031 states and 18037 transitions. Second operand 4 states. [2020-10-23 19:07:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:57,850 INFO L93 Difference]: Finished difference Result 32676 states and 53393 transitions. [2020-10-23 19:07:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:07:57,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-10-23 19:07:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:57,896 INFO L225 Difference]: With dead ends: 32676 [2020-10-23 19:07:57,896 INFO L226 Difference]: Without dead ends: 21869 [2020-10-23 19:07:57,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21869 states. [2020-10-23 19:07:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 11148. [2020-10-23 19:07:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2020-10-23 19:07:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18183 transitions. [2020-10-23 19:07:58,706 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18183 transitions. Word has length 493 [2020-10-23 19:07:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:58,706 INFO L481 AbstractCegarLoop]: Abstraction has 11148 states and 18183 transitions. [2020-10-23 19:07:58,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18183 transitions. [2020-10-23 19:07:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-23 19:07:58,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:58,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:58,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:07:58,729 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:58,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:58,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1585316326, now seen corresponding path program 1 times [2020-10-23 19:07:58,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:58,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248847270] [2020-10-23 19:07:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:00,390 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:08:00,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:08:00,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248847270] [2020-10-23 19:08:00,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:00,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:08:00,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009300714] [2020-10-23 19:08:00,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:08:00,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:08:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:00,870 INFO L87 Difference]: Start difference. First operand 11148 states and 18183 transitions. Second operand 4 states. [2020-10-23 19:08:23,378 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-23 19:08:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:27,336 INFO L93 Difference]: Finished difference Result 31729 states and 51632 transitions. [2020-10-23 19:08:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:08:27,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-10-23 19:08:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:27,376 INFO L225 Difference]: With dead ends: 31729 [2020-10-23 19:08:27,377 INFO L226 Difference]: Without dead ends: 21550 [2020-10-23 19:08:27,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21550 states. [2020-10-23 19:08:28,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21550 to 21547. [2020-10-23 19:08:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21547 states. [2020-10-23 19:08:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21547 states to 21547 states and 34988 transitions. [2020-10-23 19:08:28,395 INFO L78 Accepts]: Start accepts. Automaton has 21547 states and 34988 transitions. Word has length 494 [2020-10-23 19:08:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:28,396 INFO L481 AbstractCegarLoop]: Abstraction has 21547 states and 34988 transitions. [2020-10-23 19:08:28,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:08:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 21547 states and 34988 transitions. [2020-10-23 19:08:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-23 19:08:28,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:28,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:08:28,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:08:28,423 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1721534909, now seen corresponding path program 1 times [2020-10-23 19:08:28,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:28,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491185346] [2020-10-23 19:08:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:30,912 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:08:30,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:08:31,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491185346] [2020-10-23 19:08:31,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:31,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:08:31,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544771985] [2020-10-23 19:08:31,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:08:31,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:31,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:08:31,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:31,407 INFO L87 Difference]: Start difference. First operand 21547 states and 34988 transitions. Second operand 5 states. [2020-10-23 19:08:49,094 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:08:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:53,327 INFO L93 Difference]: Finished difference Result 63145 states and 102512 transitions. [2020-10-23 19:08:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:08:53,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-10-23 19:08:53,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:53,398 INFO L225 Difference]: With dead ends: 63145 [2020-10-23 19:08:53,398 INFO L226 Difference]: Without dead ends: 41816 [2020-10-23 19:08:53,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:08:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41816 states. [2020-10-23 19:08:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41816 to 41813. [2020-10-23 19:08:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41813 states. [2020-10-23 19:08:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41813 states to 41813 states and 67579 transitions. [2020-10-23 19:08:55,629 INFO L78 Accepts]: Start accepts. Automaton has 41813 states and 67579 transitions. Word has length 494 [2020-10-23 19:08:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:55,629 INFO L481 AbstractCegarLoop]: Abstraction has 41813 states and 67579 transitions. [2020-10-23 19:08:55,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:08:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 41813 states and 67579 transitions. [2020-10-23 19:08:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-10-23 19:08:55,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:55,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:08:55,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:08:55,674 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:55,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1336718215, now seen corresponding path program 1 times [2020-10-23 19:08:55,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:55,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363793846] [2020-10-23 19:08:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:57,509 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:08:57,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:08:57,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363793846] [2020-10-23 19:08:57,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:57,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:08:57,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739956200] [2020-10-23 19:08:57,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:08:57,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:08:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:57,859 INFO L87 Difference]: Start difference. First operand 41813 states and 67579 transitions. Second operand 4 states. [2020-10-23 19:09:23,554 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-23 19:09:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:28,247 INFO L93 Difference]: Finished difference Result 122641 states and 198036 transitions. [2020-10-23 19:09:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:09:28,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-10-23 19:09:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:28,378 INFO L225 Difference]: With dead ends: 122641 [2020-10-23 19:09:28,378 INFO L226 Difference]: Without dead ends: 82370 [2020-10-23 19:09:28,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:09:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82370 states. [2020-10-23 19:09:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82370 to 82367. [2020-10-23 19:09:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82367 states. [2020-10-23 19:09:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82367 states to 82367 states and 132617 transitions. [2020-10-23 19:09:32,683 INFO L78 Accepts]: Start accepts. Automaton has 82367 states and 132617 transitions. Word has length 496 [2020-10-23 19:09:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:09:32,688 INFO L481 AbstractCegarLoop]: Abstraction has 82367 states and 132617 transitions. [2020-10-23 19:09:32,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:09:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 82367 states and 132617 transitions. [2020-10-23 19:09:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-10-23 19:09:32,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:09:32,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:09:32,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:09:32,818 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:09:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:09:32,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1875128366, now seen corresponding path program 1 times [2020-10-23 19:09:32,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:09:32,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85446059] [2020-10-23 19:09:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:09:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:35,166 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:09:35,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:09:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:09:35,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85446059] [2020-10-23 19:09:35,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:09:35,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:09:35,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251072646] [2020-10-23 19:09:35,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:09:35,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:09:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:09:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:09:35,381 INFO L87 Difference]: Start difference. First operand 82367 states and 132617 transitions. Second operand 4 states. [2020-10-23 19:09:59,182 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-23 19:09:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:59,566 INFO L93 Difference]: Finished difference Result 161141 states and 256573 transitions. [2020-10-23 19:09:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:09:59,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-10-23 19:09:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:59,732 INFO L225 Difference]: With dead ends: 161141 [2020-10-23 19:09:59,733 INFO L226 Difference]: Without dead ends: 110498 [2020-10-23 19:09:59,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:09:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110498 states. [2020-10-23 19:10:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110498 to 94175. [2020-10-23 19:10:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94175 states. [2020-10-23 19:10:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94175 states to 94175 states and 152041 transitions. [2020-10-23 19:10:05,031 INFO L78 Accepts]: Start accepts. Automaton has 94175 states and 152041 transitions. Word has length 496 [2020-10-23 19:10:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:10:05,032 INFO L481 AbstractCegarLoop]: Abstraction has 94175 states and 152041 transitions. [2020-10-23 19:10:05,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:10:05,032 INFO L276 IsEmpty]: Start isEmpty. Operand 94175 states and 152041 transitions. [2020-10-23 19:10:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-10-23 19:10:05,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:10:05,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:10:05,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:10:05,144 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:10:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:10:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2088889780, now seen corresponding path program 1 times [2020-10-23 19:10:05,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:10:05,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606134242] [2020-10-23 19:10:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:10:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:07,128 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:10:07,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:10:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:10:07,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606134242] [2020-10-23 19:10:07,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:10:07,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:10:07,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028860387] [2020-10-23 19:10:07,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:10:07,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:10:07,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:10:07,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:10:07,646 INFO L87 Difference]: Start difference. First operand 94175 states and 152041 transitions. Second operand 4 states. [2020-10-23 19:10:36,912 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 438 [2020-10-23 19:10:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:10:43,444 INFO L93 Difference]: Finished difference Result 275340 states and 443716 transitions. [2020-10-23 19:10:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:10:43,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-10-23 19:10:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:10:43,760 INFO L225 Difference]: With dead ends: 275340 [2020-10-23 19:10:43,760 INFO L226 Difference]: Without dead ends: 184873 [2020-10-23 19:10:43,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:10:44,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184873 states. [2020-10-23 19:10:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184873 to 184870. [2020-10-23 19:10:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184870 states. [2020-10-23 19:10:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184870 states to 184870 states and 297129 transitions. [2020-10-23 19:10:54,421 INFO L78 Accepts]: Start accepts. Automaton has 184870 states and 297129 transitions. Word has length 498 [2020-10-23 19:10:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:10:54,422 INFO L481 AbstractCegarLoop]: Abstraction has 184870 states and 297129 transitions. [2020-10-23 19:10:54,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:10:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 184870 states and 297129 transitions. [2020-10-23 19:10:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-10-23 19:10:54,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:10:54,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:10:54,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:10:54,573 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:10:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:10:54,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1811753647, now seen corresponding path program 1 times [2020-10-23 19:10:54,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:10:54,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666211304] [2020-10-23 19:10:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:10:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:57,463 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:10:57,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:10:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:10:57,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666211304] [2020-10-23 19:10:57,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:10:57,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:10:57,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674272607] [2020-10-23 19:10:57,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:10:57,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:10:57,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:10:57,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:10:57,882 INFO L87 Difference]: Start difference. First operand 184870 states and 297129 transitions. Second operand 5 states. [2020-10-23 19:11:29,778 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:11:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:11:39,318 INFO L93 Difference]: Finished difference Result 548990 states and 882475 transitions. [2020-10-23 19:11:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:11:39,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 498 [2020-10-23 19:11:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:11:40,225 INFO L225 Difference]: With dead ends: 548990 [2020-10-23 19:11:40,226 INFO L226 Difference]: Without dead ends: 364508 [2020-10-23 19:11:40,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:11:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364508 states. [2020-10-23 19:12:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364508 to 364505. [2020-10-23 19:12:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364505 states. [2020-10-23 19:12:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364505 states to 364505 states and 583391 transitions. [2020-10-23 19:12:03,306 INFO L78 Accepts]: Start accepts. Automaton has 364505 states and 583391 transitions. Word has length 498 [2020-10-23 19:12:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:12:03,306 INFO L481 AbstractCegarLoop]: Abstraction has 364505 states and 583391 transitions. [2020-10-23 19:12:03,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:12:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 364505 states and 583391 transitions. [2020-10-23 19:12:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-23 19:12:04,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:12:04,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:12:04,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:12:04,075 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:12:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:12:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1152777893, now seen corresponding path program 1 times [2020-10-23 19:12:04,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:12:04,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421493043] [2020-10-23 19:12:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:12:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:12:06,519 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:12:06,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:12:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:12:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:12:06,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421493043] [2020-10-23 19:12:06,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:12:06,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:12:06,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020837348] [2020-10-23 19:12:06,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:12:06,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:12:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:12:06,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:12:06,896 INFO L87 Difference]: Start difference. First operand 364505 states and 583391 transitions. Second operand 5 states. [2020-10-23 19:12:54,012 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 439 [2020-10-23 19:13:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:13:08,568 INFO L93 Difference]: Finished difference Result 1077461 states and 1723894 transitions. [2020-10-23 19:13:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:13:08,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 500 [2020-10-23 19:13:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:13:10,141 INFO L225 Difference]: With dead ends: 1077461 [2020-10-23 19:13:10,141 INFO L226 Difference]: Without dead ends: 713513 [2020-10-23 19:13:10,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:13:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713513 states. [2020-10-23 19:13:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713513 to 713510. [2020-10-23 19:13:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713510 states. [2020-10-23 19:13:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713510 states to 713510 states and 1136276 transitions. [2020-10-23 19:13:56,047 INFO L78 Accepts]: Start accepts. Automaton has 713510 states and 1136276 transitions. Word has length 500 [2020-10-23 19:13:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:13:56,048 INFO L481 AbstractCegarLoop]: Abstraction has 713510 states and 1136276 transitions. [2020-10-23 19:13:56,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:13:56,048 INFO L276 IsEmpty]: Start isEmpty. Operand 713510 states and 1136276 transitions. [2020-10-23 19:13:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-23 19:13:57,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:13:57,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:13:57,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 19:13:57,537 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:13:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:13:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash -87066734, now seen corresponding path program 1 times [2020-10-23 19:13:57,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:13:57,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951744192] [2020-10-23 19:13:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:13:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:13:59,183 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2020-10-23 19:14:00,481 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 433 [2020-10-23 19:14:00,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:14:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:14:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:14:01,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951744192] [2020-10-23 19:14:01,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:14:01,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:14:01,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904244337] [2020-10-23 19:14:01,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:14:01,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:14:01,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:14:01,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:14:01,206 INFO L87 Difference]: Start difference. First operand 713510 states and 1136276 transitions. Second operand 5 states.