/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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:00:54,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:00:54,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:00:54,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 19:00:54,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:00:54,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:00:54,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:00:54,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:00:54,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:00:54,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:00:54,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:00:54,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:00:54,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:00:54,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:00:54,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:00:54,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:00:54,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:00:54,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:00:54,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:00:54,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:00:54,873 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 19:00:54,934 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:00:54,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:00:54,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:00:54,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:00:54,939 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:00:54,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:00:54,939 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:00:54,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:00:54,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:00:54,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:00:54,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:00:54,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:00:54,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:00:54,943 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:00:54,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:00:54,943 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:00:54,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:00:54,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:00:54,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:00:54,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:00:54,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:00:54,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:00:54,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:00:54,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:00:54,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:00:54,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:00:54,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:00:54,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:00:54,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:00:54,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:00:55,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:00:55,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:00:55,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:00:55,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:00:55,376 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:00:55,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:00:55,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba1087086/afb15c9e8cea4e9d8f524de168662800/FLAG5280dd16c [2020-10-23 19:00:56,275 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:00:56,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:00:56,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba1087086/afb15c9e8cea4e9d8f524de168662800/FLAG5280dd16c [2020-10-23 19:00:56,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba1087086/afb15c9e8cea4e9d8f524de168662800 [2020-10-23 19:00:56,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:00:56,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:00:56,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:00:56,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:00:56,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:00:56,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:00:56" (1/1) ... [2020-10-23 19:00:56,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afeb451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:56, skipping insertion in model container [2020-10-23 19:00:56,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:00:56" (1/1) ... [2020-10-23 19:00:56,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:00:56,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:00:57,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:00:58,005 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:00:58,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:00:58,498 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:00:58,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58 WrapperNode [2020-10-23 19:00:58,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:00:58,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:00:58,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:00:58,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:00:58,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (1/1) ... [2020-10-23 19:00:58,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (1/1) ... [2020-10-23 19:00:58,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (1/1) ... [2020-10-23 19:00:58,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (1/1) ... [2020-10-23 19:00:58,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (1/1) ... [2020-10-23 19:00:58,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (1/1) ... [2020-10-23 19:00:58,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (1/1) ... [2020-10-23 19:00:58,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:00:58,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:00:58,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:00:58,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:00:58,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (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 19:00:58,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:00:58,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:00:58,802 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:00:58,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:00:58,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:00:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:00:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:00:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:00:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:00:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:00:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 19:00:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:00:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:00:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:00:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:00:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:00:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:00:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:00:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:00:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:00:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:00:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:00:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:00:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:00:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:00:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:00:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:00:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:00:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:01:02,044 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:01:02,044 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:01:02,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:01:02 BoogieIcfgContainer [2020-10-23 19:01:02,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:01:02,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:01:02,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:01:02,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:01:02,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:00:56" (1/3) ... [2020-10-23 19:01:02,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ca6d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:01:02, skipping insertion in model container [2020-10-23 19:01:02,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:00:58" (2/3) ... [2020-10-23 19:01:02,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ca6d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:01:02, skipping insertion in model container [2020-10-23 19:01:02,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:01:02" (3/3) ... [2020-10-23 19:01:02,057 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-23 19:01:02,069 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:01:02,075 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:01:02,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:01:02,130 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:01:02,130 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:01:02,130 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:01:02,130 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:01:02,130 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:01:02,131 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:01:02,131 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:01:02,131 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:01:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states. [2020-10-23 19:01:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-23 19:01:02,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:02,206 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] [2020-10-23 19:01:02,207 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash -626420471, now seen corresponding path program 1 times [2020-10-23 19:01:02,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:02,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347588576] [2020-10-23 19:01:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:04,177 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:01:04,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:04,472 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 19:01:04,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347588576] [2020-10-23 19:01:04,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:04,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:04,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024220096] [2020-10-23 19:01:04,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:04,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:04,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:04,506 INFO L87 Difference]: Start difference. First operand 800 states. Second operand 4 states. [2020-10-23 19:01:05,377 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-23 19:01:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:10,995 INFO L93 Difference]: Finished difference Result 1521 states and 2667 transitions. [2020-10-23 19:01:10,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:10,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-23 19:01:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:11,032 INFO L225 Difference]: With dead ends: 1521 [2020-10-23 19:01:11,032 INFO L226 Difference]: Without dead ends: 1301 [2020-10-23 19:01:11,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2020-10-23 19:01:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1298. [2020-10-23 19:01:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2020-10-23 19:01:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2029 transitions. [2020-10-23 19:01:11,214 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2029 transitions. Word has length 319 [2020-10-23 19:01:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:11,216 INFO L481 AbstractCegarLoop]: Abstraction has 1298 states and 2029 transitions. [2020-10-23 19:01:11,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2029 transitions. [2020-10-23 19:01:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-23 19:01:11,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:11,228 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] [2020-10-23 19:01:11,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:01:11,229 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:11,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1932269269, now seen corresponding path program 1 times [2020-10-23 19:01:11,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:11,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428937481] [2020-10-23 19:01:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:12,217 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:01:12,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:12,501 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 19:01:12,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428937481] [2020-10-23 19:01:12,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:12,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:12,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205240142] [2020-10-23 19:01:12,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:12,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:12,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:12,515 INFO L87 Difference]: Start difference. First operand 1298 states and 2029 transitions. Second operand 4 states. [2020-10-23 19:01:13,283 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-23 19:01:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:18,128 INFO L93 Difference]: Finished difference Result 2674 states and 4204 transitions. [2020-10-23 19:01:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:18,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-23 19:01:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:18,146 INFO L225 Difference]: With dead ends: 2674 [2020-10-23 19:01:18,146 INFO L226 Difference]: Without dead ends: 2291 [2020-10-23 19:01:18,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-10-23 19:01:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2288. [2020-10-23 19:01:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2020-10-23 19:01:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3565 transitions. [2020-10-23 19:01:18,262 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3565 transitions. Word has length 319 [2020-10-23 19:01:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:18,265 INFO L481 AbstractCegarLoop]: Abstraction has 2288 states and 3565 transitions. [2020-10-23 19:01:18,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3565 transitions. [2020-10-23 19:01:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-23 19:01:18,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:18,285 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] [2020-10-23 19:01:18,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:01:18,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:18,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1257489356, now seen corresponding path program 1 times [2020-10-23 19:01:18,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:18,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950859628] [2020-10-23 19:01:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:19,340 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:01:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:19,545 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 19:01:19,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950859628] [2020-10-23 19:01:19,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:19,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:19,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274332726] [2020-10-23 19:01:19,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:19,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:19,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:19,548 INFO L87 Difference]: Start difference. First operand 2288 states and 3565 transitions. Second operand 4 states. [2020-10-23 19:01:20,256 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-23 19:01:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:24,965 INFO L93 Difference]: Finished difference Result 4858 states and 7625 transitions. [2020-10-23 19:01:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:24,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-23 19:01:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:24,989 INFO L225 Difference]: With dead ends: 4858 [2020-10-23 19:01:24,989 INFO L226 Difference]: Without dead ends: 4191 [2020-10-23 19:01:24,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2020-10-23 19:01:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 4188. [2020-10-23 19:01:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4188 states. [2020-10-23 19:01:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 6505 transitions. [2020-10-23 19:01:25,155 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 6505 transitions. Word has length 319 [2020-10-23 19:01:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:25,155 INFO L481 AbstractCegarLoop]: Abstraction has 4188 states and 6505 transitions. [2020-10-23 19:01:25,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 6505 transitions. [2020-10-23 19:01:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-23 19:01:25,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:25,167 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] [2020-10-23 19:01:25,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:01:25,167 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:25,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1907491795, now seen corresponding path program 1 times [2020-10-23 19:01:25,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:25,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274537014] [2020-10-23 19:01:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:26,556 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:01:26,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:26,734 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 19:01:26,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274537014] [2020-10-23 19:01:26,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:26,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:01:26,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353210518] [2020-10-23 19:01:26,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:01:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:26,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:01:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:26,737 INFO L87 Difference]: Start difference. First operand 4188 states and 6505 transitions. Second operand 5 states. [2020-10-23 19:01:33,568 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:01:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:35,615 INFO L93 Difference]: Finished difference Result 12381 states and 19212 transitions. [2020-10-23 19:01:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:01:35,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-23 19:01:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:35,658 INFO L225 Difference]: With dead ends: 12381 [2020-10-23 19:01:35,658 INFO L226 Difference]: Without dead ends: 8208 [2020-10-23 19:01:35,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:01:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8208 states. [2020-10-23 19:01:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8208 to 8205. [2020-10-23 19:01:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8205 states. [2020-10-23 19:01:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8205 states to 8205 states and 12671 transitions. [2020-10-23 19:01:36,141 INFO L78 Accepts]: Start accepts. Automaton has 8205 states and 12671 transitions. Word has length 319 [2020-10-23 19:01:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:36,141 INFO L481 AbstractCegarLoop]: Abstraction has 8205 states and 12671 transitions. [2020-10-23 19:01:36,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:01:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 8205 states and 12671 transitions. [2020-10-23 19:01:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-23 19:01:36,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:36,161 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] [2020-10-23 19:01:36,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:01:36,161 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1439252544, now seen corresponding path program 1 times [2020-10-23 19:01:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:36,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657932969] [2020-10-23 19:01:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:36,943 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:01:36,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:37,155 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 19:01:37,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657932969] [2020-10-23 19:01:37,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:37,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327114084] [2020-10-23 19:01:37,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:37,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:37,158 INFO L87 Difference]: Start difference. First operand 8205 states and 12671 transitions. Second operand 4 states. [2020-10-23 19:01:45,155 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:01:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:47,125 INFO L93 Difference]: Finished difference Result 24164 states and 37249 transitions. [2020-10-23 19:01:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:47,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-10-23 19:01:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:47,192 INFO L225 Difference]: With dead ends: 24164 [2020-10-23 19:01:47,193 INFO L226 Difference]: Without dead ends: 16088 [2020-10-23 19:01:47,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16088 states. [2020-10-23 19:01:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16088 to 16085. [2020-10-23 19:01:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16085 states. [2020-10-23 19:01:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16085 states to 16085 states and 24694 transitions. [2020-10-23 19:01:47,860 INFO L78 Accepts]: Start accepts. Automaton has 16085 states and 24694 transitions. Word has length 321 [2020-10-23 19:01:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:47,860 INFO L481 AbstractCegarLoop]: Abstraction has 16085 states and 24694 transitions. [2020-10-23 19:01:47,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 16085 states and 24694 transitions. [2020-10-23 19:01:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-23 19:01:47,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:47,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:47,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:01:47,898 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1039756005, now seen corresponding path program 1 times [2020-10-23 19:01:47,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:47,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763495105] [2020-10-23 19:01:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:48,692 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:01:48,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:48,841 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 19:01:48,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763495105] [2020-10-23 19:01:48,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:48,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:48,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763057759] [2020-10-23 19:01:48,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:48,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:48,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:48,844 INFO L87 Difference]: Start difference. First operand 16085 states and 24694 transitions. Second operand 4 states. [2020-10-23 19:01:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:58,551 INFO L93 Difference]: Finished difference Result 48178 states and 73957 transitions. [2020-10-23 19:01:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:01:58,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-10-23 19:01:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:58,629 INFO L225 Difference]: With dead ends: 48178 [2020-10-23 19:01:58,629 INFO L226 Difference]: Without dead ends: 32135 [2020-10-23 19:01:58,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32135 states. [2020-10-23 19:01:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32135 to 16104. [2020-10-23 19:01:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16104 states. [2020-10-23 19:01:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16104 states to 16104 states and 24722 transitions. [2020-10-23 19:01:59,556 INFO L78 Accepts]: Start accepts. Automaton has 16104 states and 24722 transitions. Word has length 321 [2020-10-23 19:01:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:59,557 INFO L481 AbstractCegarLoop]: Abstraction has 16104 states and 24722 transitions. [2020-10-23 19:01:59,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 16104 states and 24722 transitions. [2020-10-23 19:01:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-23 19:01:59,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:59,588 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] [2020-10-23 19:01:59,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:01:59,588 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1333940344, now seen corresponding path program 1 times [2020-10-23 19:01:59,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:59,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848783773] [2020-10-23 19:01:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:00,362 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:00,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:00,471 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 19:02:00,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848783773] [2020-10-23 19:02:00,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:00,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:00,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363515576] [2020-10-23 19:02:00,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:00,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:00,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:00,473 INFO L87 Difference]: Start difference. First operand 16104 states and 24722 transitions. Second operand 4 states. [2020-10-23 19:02:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:10,424 INFO L93 Difference]: Finished difference Result 48197 states and 73978 transitions. [2020-10-23 19:02:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:10,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-10-23 19:02:10,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:10,497 INFO L225 Difference]: With dead ends: 48197 [2020-10-23 19:02:10,497 INFO L226 Difference]: Without dead ends: 32153 [2020-10-23 19:02:10,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32153 states. [2020-10-23 19:02:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32153 to 16122. [2020-10-23 19:02:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16122 states. [2020-10-23 19:02:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16122 states to 16122 states and 24743 transitions. [2020-10-23 19:02:11,596 INFO L78 Accepts]: Start accepts. Automaton has 16122 states and 24743 transitions. Word has length 322 [2020-10-23 19:02:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:11,596 INFO L481 AbstractCegarLoop]: Abstraction has 16122 states and 24743 transitions. [2020-10-23 19:02:11,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 16122 states and 24743 transitions. [2020-10-23 19:02:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-23 19:02:11,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:11,620 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] [2020-10-23 19:02:11,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:02:11,621 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:11,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1946213755, now seen corresponding path program 1 times [2020-10-23 19:02:11,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:11,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758011494] [2020-10-23 19:02:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:12,441 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:12,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:12,610 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 19:02:12,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758011494] [2020-10-23 19:02:12,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:12,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:12,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032077380] [2020-10-23 19:02:12,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:12,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:12,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:12,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:12,613 INFO L87 Difference]: Start difference. First operand 16122 states and 24743 transitions. Second operand 4 states. [2020-10-23 19:02:21,106 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:02:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:23,340 INFO L93 Difference]: Finished difference Result 45677 states and 69958 transitions. [2020-10-23 19:02:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:23,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 323 [2020-10-23 19:02:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:23,382 INFO L225 Difference]: With dead ends: 45677 [2020-10-23 19:02:23,383 INFO L226 Difference]: Without dead ends: 29800 [2020-10-23 19:02:23,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29800 states. [2020-10-23 19:02:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29800 to 29797. [2020-10-23 19:02:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29797 states. [2020-10-23 19:02:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29797 states to 29797 states and 45411 transitions. [2020-10-23 19:02:24,885 INFO L78 Accepts]: Start accepts. Automaton has 29797 states and 45411 transitions. Word has length 323 [2020-10-23 19:02:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:24,886 INFO L481 AbstractCegarLoop]: Abstraction has 29797 states and 45411 transitions. [2020-10-23 19:02:24,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 29797 states and 45411 transitions. [2020-10-23 19:02:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-23 19:02:24,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:24,933 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] [2020-10-23 19:02:24,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:02:24,933 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:24,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2094325128, now seen corresponding path program 1 times [2020-10-23 19:02:24,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:24,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620689904] [2020-10-23 19:02:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:26,064 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:26,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:26,203 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 19:02:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620689904] [2020-10-23 19:02:26,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:26,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:02:26,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110430014] [2020-10-23 19:02:26,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:02:26,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:26,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:02:26,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:26,206 INFO L87 Difference]: Start difference. First operand 29797 states and 45411 transitions. Second operand 5 states. [2020-10-23 19:02:34,477 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:37,235 INFO L93 Difference]: Finished difference Result 87911 states and 133766 transitions. [2020-10-23 19:02:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:02:37,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-23 19:02:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:37,318 INFO L225 Difference]: With dead ends: 87911 [2020-10-23 19:02:37,318 INFO L226 Difference]: Without dead ends: 58173 [2020-10-23 19:02:37,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:02:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58173 states. [2020-10-23 19:02:39,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58173 to 58170. [2020-10-23 19:02:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58170 states. [2020-10-23 19:02:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58170 states to 58170 states and 88008 transitions. [2020-10-23 19:02:39,864 INFO L78 Accepts]: Start accepts. Automaton has 58170 states and 88008 transitions. Word has length 323 [2020-10-23 19:02:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:39,864 INFO L481 AbstractCegarLoop]: Abstraction has 58170 states and 88008 transitions. [2020-10-23 19:02:39,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:02:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 58170 states and 88008 transitions. [2020-10-23 19:02:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:02:39,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:39,905 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] [2020-10-23 19:02:39,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:02:39,906 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1348349678, now seen corresponding path program 1 times [2020-10-23 19:02:39,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:39,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41706014] [2020-10-23 19:02:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:41,154 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:02:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:41,443 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 19:02:41,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41706014] [2020-10-23 19:02:41,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:41,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:02:41,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218093631] [2020-10-23 19:02:41,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:02:41,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:41,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:02:41,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:41,445 INFO L87 Difference]: Start difference. First operand 58170 states and 88008 transitions. Second operand 5 states. [2020-10-23 19:02:51,188 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:54,827 INFO L93 Difference]: Finished difference Result 171707 states and 259317 transitions. [2020-10-23 19:02:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:02:54,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-23 19:02:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:54,979 INFO L225 Difference]: With dead ends: 171707 [2020-10-23 19:02:54,979 INFO L226 Difference]: Without dead ends: 113658 [2020-10-23 19:02:55,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:02:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113658 states. [2020-10-23 19:03:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113658 to 113655. [2020-10-23 19:03:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113655 states. [2020-10-23 19:03:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113655 states to 113655 states and 170641 transitions. [2020-10-23 19:03:00,753 INFO L78 Accepts]: Start accepts. Automaton has 113655 states and 170641 transitions. Word has length 325 [2020-10-23 19:03:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:00,754 INFO L481 AbstractCegarLoop]: Abstraction has 113655 states and 170641 transitions. [2020-10-23 19:03:00,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 113655 states and 170641 transitions. [2020-10-23 19:03:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:03:00,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:00,889 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] [2020-10-23 19:03:00,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:03:00,890 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -668437036, now seen corresponding path program 1 times [2020-10-23 19:03:00,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:00,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570857774] [2020-10-23 19:03:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:02,197 WARN L193 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:02,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:02,427 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 19:03:02,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570857774] [2020-10-23 19:03:02,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:02,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:02,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594446275] [2020-10-23 19:03:02,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:02,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:02,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:02,430 INFO L87 Difference]: Start difference. First operand 113655 states and 170641 transitions. Second operand 5 states. [2020-10-23 19:03:15,588 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:03:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:21,102 INFO L93 Difference]: Finished difference Result 335883 states and 503456 transitions. [2020-10-23 19:03:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:21,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-23 19:03:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:21,453 INFO L225 Difference]: With dead ends: 335883 [2020-10-23 19:03:21,454 INFO L226 Difference]: Without dead ends: 222462 [2020-10-23 19:03:21,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222462 states. [2020-10-23 19:03:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222462 to 222459. [2020-10-23 19:03:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222459 states. [2020-10-23 19:03:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222459 states to 222459 states and 331549 transitions. [2020-10-23 19:03:33,803 INFO L78 Accepts]: Start accepts. Automaton has 222459 states and 331549 transitions. Word has length 325 [2020-10-23 19:03:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:33,804 INFO L481 AbstractCegarLoop]: Abstraction has 222459 states and 331549 transitions. [2020-10-23 19:03:33,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 222459 states and 331549 transitions. [2020-10-23 19:03:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:03:33,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:33,967 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] [2020-10-23 19:03:33,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:03:33,967 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:33,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1739212502, now seen corresponding path program 1 times [2020-10-23 19:03:33,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:33,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813439708] [2020-10-23 19:03:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:35,178 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:03:35,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:35,360 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 19:03:35,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813439708] [2020-10-23 19:03:35,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:35,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:03:35,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938246781] [2020-10-23 19:03:35,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:03:35,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:35,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:03:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:03:35,363 INFO L87 Difference]: Start difference. First operand 222459 states and 331549 transitions. Second operand 4 states. [2020-10-23 19:03:56,450 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-23 19:04:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:05,553 INFO L93 Difference]: Finished difference Result 656657 states and 976727 transitions. [2020-10-23 19:04:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:04:05,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-23 19:04:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:06,496 INFO L225 Difference]: With dead ends: 656657 [2020-10-23 19:04:06,496 INFO L226 Difference]: Without dead ends: 435582 [2020-10-23 19:04:06,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:04:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435582 states. [2020-10-23 19:04:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435582 to 435579. [2020-10-23 19:04:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435579 states. [2020-10-23 19:04:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435579 states to 435579 states and 644315 transitions. [2020-10-23 19:04:31,641 INFO L78 Accepts]: Start accepts. Automaton has 435579 states and 644315 transitions. Word has length 327 [2020-10-23 19:04:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:31,641 INFO L481 AbstractCegarLoop]: Abstraction has 435579 states and 644315 transitions. [2020-10-23 19:04:31,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:04:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 435579 states and 644315 transitions. [2020-10-23 19:04:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:04:32,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:32,016 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] [2020-10-23 19:04:32,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:04:32,016 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash -392466747, now seen corresponding path program 1 times [2020-10-23 19:04:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:32,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17016280] [2020-10-23 19:04:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:33,196 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 307 [2020-10-23 19:04:33,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:33,323 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 19:04:33,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17016280] [2020-10-23 19:04:33,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:33,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:33,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553334687] [2020-10-23 19:04:33,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:33,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:33,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:33,328 INFO L87 Difference]: Start difference. First operand 435579 states and 644315 transitions. Second operand 4 states.