/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 0.2.0-7d8eed3 [2020-11-06 23:01:44,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:01:44,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:01:44,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:01:44,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:01:44,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:01:44,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:01:44,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:01:44,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:01:44,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:01:44,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:01:44,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:01:44,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:01:44,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:01:44,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:01:44,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:01:44,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:01:44,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:01:44,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:01:44,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:01:44,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:01:44,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:01:44,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:01:44,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:01:44,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:01:44,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:01:44,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:01:44,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:01:44,396 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 [2020-11-06 23:01:44,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:01:44,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:01:44,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:01:44,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:01:44,426 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:01:44,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:01:44,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:01:44,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:01:44,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:01:44,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:01:44,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:01:44,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:01:44,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:01:44,428 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:01:44,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:01:44,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:01:44,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:01:44,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:01:44,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:01:44,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:01:44,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:01:44,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:01:44,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:01:44,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:01:44,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:01:44,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:01:44,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:01:44,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:01:44,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:01:44,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:01:44,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:01:44,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:01:44,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:01:44,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:01:44,859 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:01:44,860 INFO L432 ainManager$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 [2020-11-06 23:01:44,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114378f03/792b813ddacf41398b46291fe5fc4512/FLAG84e54c877 [2020-11-06 23:01:45,782 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:01:45,786 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 [2020-11-06 23:01:45,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114378f03/792b813ddacf41398b46291fe5fc4512/FLAG84e54c877 [2020-11-06 23:01:45,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/114378f03/792b813ddacf41398b46291fe5fc4512 [2020-11-06 23:01:45,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:01:45,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:01:45,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:01:45,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:01:45,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:01:45,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21359f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:45, skipping insertion in model container [2020-11-06 23:01:45,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:45" (1/1) ... [2020-11-06 23:01:45,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:01:46,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:01:46,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:01:46,929 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:01:47,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:01:47,497 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:01:47,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47 WrapperNode [2020-11-06 23:01:47,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:01:47,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:01:47,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:01:47,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:01:47,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (1/1) ... [2020-11-06 23:01:47,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (1/1) ... [2020-11-06 23:01:47,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (1/1) ... [2020-11-06 23:01:47,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (1/1) ... [2020-11-06 23:01:47,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (1/1) ... [2020-11-06 23:01:47,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (1/1) ... [2020-11-06 23:01:47,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (1/1) ... [2020-11-06 23:01:47,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:01:47,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:01:47,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:01:47,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:01:47,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (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 [2020-11-06 23:01:47,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:01:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:01:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:01:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:01:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:01:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:01:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:01:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:01:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:01:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:01:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:01:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:01:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:01:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:01:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:01:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:01:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:01:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:01:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:01:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:01:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:01:47,751 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:01:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:01:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:01:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:01:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:01:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:01:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:01:47,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:01:51,978 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:01:51,979 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:01:51,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:51 BoogieIcfgContainer [2020-11-06 23:01:51,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:01:51,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:01:51,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:01:51,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:01:51,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:45" (1/3) ... [2020-11-06 23:01:51,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463c7f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:51, skipping insertion in model container [2020-11-06 23:01:51,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:47" (2/3) ... [2020-11-06 23:01:51,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463c7f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:51, skipping insertion in model container [2020-11-06 23:01:51,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:51" (3/3) ... [2020-11-06 23:01:51,992 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:01:52,010 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:01:52,015 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:01:52,032 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:01:52,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:01:52,086 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:01:52,086 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:01:52,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:01:52,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:01:52,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:01:52,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:01:52,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:01:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states. [2020-11-06 23:01:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-06 23:01:52,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:52,182 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] [2020-11-06 23:01:52,183 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash -626420471, now seen corresponding path program 1 times [2020-11-06 23:01:52,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:52,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687795592] [2020-11-06 23:01:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:54,908 WARN L194 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:01:54,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:01:55,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687795592] [2020-11-06 23:01:55,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:55,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:55,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986331857] [2020-11-06 23:01:55,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:55,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:55,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:55,185 INFO L87 Difference]: Start difference. First operand 800 states. Second operand 4 states. [2020-11-06 23:01:57,061 WARN L194 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 308 [2020-11-06 23:02:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:05,261 INFO L93 Difference]: Finished difference Result 1521 states and 2667 transitions. [2020-11-06 23:02:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:05,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-11-06 23:02:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:05,318 INFO L225 Difference]: With dead ends: 1521 [2020-11-06 23:02:05,318 INFO L226 Difference]: Without dead ends: 1301 [2020-11-06 23:02:05,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2020-11-06 23:02:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1298. [2020-11-06 23:02:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2020-11-06 23:02:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2029 transitions. [2020-11-06 23:02:05,512 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2029 transitions. Word has length 319 [2020-11-06 23:02:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:05,514 INFO L481 AbstractCegarLoop]: Abstraction has 1298 states and 2029 transitions. [2020-11-06 23:02:05,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2029 transitions. [2020-11-06 23:02:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-06 23:02:05,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:05,521 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] [2020-11-06 23:02:05,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:02:05,522 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:05,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1932269269, now seen corresponding path program 1 times [2020-11-06 23:02:05,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:05,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064460924] [2020-11-06 23:02:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:07,502 WARN L194 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:07,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:07,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064460924] [2020-11-06 23:02:07,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:07,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:07,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998116629] [2020-11-06 23:02:07,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:07,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:07,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:07,699 INFO L87 Difference]: Start difference. First operand 1298 states and 2029 transitions. Second operand 4 states. [2020-11-06 23:02:09,514 WARN L194 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 308 [2020-11-06 23:02:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:16,281 INFO L93 Difference]: Finished difference Result 2674 states and 4204 transitions. [2020-11-06 23:02:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:16,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-11-06 23:02:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:16,299 INFO L225 Difference]: With dead ends: 2674 [2020-11-06 23:02:16,299 INFO L226 Difference]: Without dead ends: 2291 [2020-11-06 23:02:16,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-11-06 23:02:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2288. [2020-11-06 23:02:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2020-11-06 23:02:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3565 transitions. [2020-11-06 23:02:16,443 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3565 transitions. Word has length 319 [2020-11-06 23:02:16,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:16,445 INFO L481 AbstractCegarLoop]: Abstraction has 2288 states and 3565 transitions. [2020-11-06 23:02:16,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3565 transitions. [2020-11-06 23:02:16,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-06 23:02:16,456 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:16,460 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] [2020-11-06 23:02:16,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:02:16,462 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1257489356, now seen corresponding path program 1 times [2020-11-06 23:02:16,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:16,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132983536] [2020-11-06 23:02:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:18,355 WARN L194 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:18,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:18,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132983536] [2020-11-06 23:02:18,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:18,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:18,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368426981] [2020-11-06 23:02:18,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:18,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:18,590 INFO L87 Difference]: Start difference. First operand 2288 states and 3565 transitions. Second operand 4 states. [2020-11-06 23:02:20,405 WARN L194 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 308 [2020-11-06 23:02:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:27,552 INFO L93 Difference]: Finished difference Result 4858 states and 7625 transitions. [2020-11-06 23:02:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:27,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-11-06 23:02:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:27,575 INFO L225 Difference]: With dead ends: 4858 [2020-11-06 23:02:27,575 INFO L226 Difference]: Without dead ends: 4191 [2020-11-06 23:02:27,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2020-11-06 23:02:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 4188. [2020-11-06 23:02:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4188 states. [2020-11-06 23:02:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 6505 transitions. [2020-11-06 23:02:27,722 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 6505 transitions. Word has length 319 [2020-11-06 23:02:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:27,723 INFO L481 AbstractCegarLoop]: Abstraction has 4188 states and 6505 transitions. [2020-11-06 23:02:27,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 6505 transitions. [2020-11-06 23:02:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-06 23:02:27,734 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:27,734 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] [2020-11-06 23:02:27,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:02:27,735 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:27,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:27,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1907491795, now seen corresponding path program 1 times [2020-11-06 23:02:27,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:27,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675447325] [2020-11-06 23:02:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:30,007 WARN L194 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:30,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675447325] [2020-11-06 23:02:30,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:30,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:02:30,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804392435] [2020-11-06 23:02:30,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:02:30,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:30,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:02:30,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:30,201 INFO L87 Difference]: Start difference. First operand 4188 states and 6505 transitions. Second operand 5 states. [2020-11-06 23:02:40,460 WARN L194 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:02:43,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:43,503 INFO L93 Difference]: Finished difference Result 12381 states and 19212 transitions. [2020-11-06 23:02:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:02:43,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-11-06 23:02:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:43,545 INFO L225 Difference]: With dead ends: 12381 [2020-11-06 23:02:43,545 INFO L226 Difference]: Without dead ends: 8208 [2020-11-06 23:02:43,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:02:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8208 states. [2020-11-06 23:02:43,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8208 to 8205. [2020-11-06 23:02:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8205 states. [2020-11-06 23:02:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8205 states to 8205 states and 12671 transitions. [2020-11-06 23:02:43,891 INFO L78 Accepts]: Start accepts. Automaton has 8205 states and 12671 transitions. Word has length 319 [2020-11-06 23:02:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:43,892 INFO L481 AbstractCegarLoop]: Abstraction has 8205 states and 12671 transitions. [2020-11-06 23:02:43,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:02:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8205 states and 12671 transitions. [2020-11-06 23:02:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-11-06 23:02:43,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:43,912 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] [2020-11-06 23:02:43,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:02:43,913 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:43,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1439252544, now seen corresponding path program 1 times [2020-11-06 23:02:43,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:43,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880698161] [2020-11-06 23:02:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:45,775 WARN L194 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:02:45,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:02:45,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880698161] [2020-11-06 23:02:45,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:45,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:45,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022004139] [2020-11-06 23:02:45,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:45,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:45,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:45,926 INFO L87 Difference]: Start difference. First operand 8205 states and 12671 transitions. Second operand 4 states. [2020-11-06 23:02:58,234 WARN L194 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:03:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:01,103 INFO L93 Difference]: Finished difference Result 24164 states and 37249 transitions. [2020-11-06 23:03:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:01,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-11-06 23:03:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:01,165 INFO L225 Difference]: With dead ends: 24164 [2020-11-06 23:03:01,165 INFO L226 Difference]: Without dead ends: 16088 [2020-11-06 23:03:01,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16088 states. [2020-11-06 23:03:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16088 to 16085. [2020-11-06 23:03:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16085 states. [2020-11-06 23:03:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16085 states to 16085 states and 24694 transitions. [2020-11-06 23:03:01,790 INFO L78 Accepts]: Start accepts. Automaton has 16085 states and 24694 transitions. Word has length 321 [2020-11-06 23:03:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:01,791 INFO L481 AbstractCegarLoop]: Abstraction has 16085 states and 24694 transitions. [2020-11-06 23:03:01,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 16085 states and 24694 transitions. [2020-11-06 23:03:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-11-06 23:03:01,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:01,822 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] [2020-11-06 23:03:01,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:03:01,822 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:01,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1039756005, now seen corresponding path program 1 times [2020-11-06 23:03:01,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:01,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613212182] [2020-11-06 23:03:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:03,570 WARN L194 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:03,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:03,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613212182] [2020-11-06 23:03:03,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:03,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:03,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762026168] [2020-11-06 23:03:03,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:03,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:03,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:03,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:03,679 INFO L87 Difference]: Start difference. First operand 16085 states and 24694 transitions. Second operand 4 states. [2020-11-06 23:03:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:17,482 INFO L93 Difference]: Finished difference Result 48178 states and 73957 transitions. [2020-11-06 23:03:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:17,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-11-06 23:03:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:17,555 INFO L225 Difference]: With dead ends: 48178 [2020-11-06 23:03:17,556 INFO L226 Difference]: Without dead ends: 32135 [2020-11-06 23:03:17,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32135 states. [2020-11-06 23:03:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32135 to 16104. [2020-11-06 23:03:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16104 states. [2020-11-06 23:03:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16104 states to 16104 states and 24722 transitions. [2020-11-06 23:03:18,647 INFO L78 Accepts]: Start accepts. Automaton has 16104 states and 24722 transitions. Word has length 321 [2020-11-06 23:03:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:18,648 INFO L481 AbstractCegarLoop]: Abstraction has 16104 states and 24722 transitions. [2020-11-06 23:03:18,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 16104 states and 24722 transitions. [2020-11-06 23:03:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-11-06 23:03:18,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:18,680 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] [2020-11-06 23:03:18,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:03:18,680 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:18,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1333940344, now seen corresponding path program 1 times [2020-11-06 23:03:18,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:18,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534347345] [2020-11-06 23:03:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:20,335 WARN L194 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:20,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:20,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534347345] [2020-11-06 23:03:20,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:20,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:20,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421838452] [2020-11-06 23:03:20,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:20,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:20,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:20,509 INFO L87 Difference]: Start difference. First operand 16104 states and 24722 transitions. Second operand 4 states. [2020-11-06 23:03:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:34,577 INFO L93 Difference]: Finished difference Result 48197 states and 73978 transitions. [2020-11-06 23:03:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:34,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-11-06 23:03:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:34,639 INFO L225 Difference]: With dead ends: 48197 [2020-11-06 23:03:34,639 INFO L226 Difference]: Without dead ends: 32153 [2020-11-06 23:03:34,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32153 states. [2020-11-06 23:03:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32153 to 16122. [2020-11-06 23:03:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16122 states. [2020-11-06 23:03:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16122 states to 16122 states and 24743 transitions. [2020-11-06 23:03:35,744 INFO L78 Accepts]: Start accepts. Automaton has 16122 states and 24743 transitions. Word has length 322 [2020-11-06 23:03:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:35,744 INFO L481 AbstractCegarLoop]: Abstraction has 16122 states and 24743 transitions. [2020-11-06 23:03:35,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 16122 states and 24743 transitions. [2020-11-06 23:03:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-06 23:03:35,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:35,777 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] [2020-11-06 23:03:35,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:35,777 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1946213755, now seen corresponding path program 1 times [2020-11-06 23:03:35,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:35,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759933701] [2020-11-06 23:03:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:37,633 WARN L194 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:37,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:37,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759933701] [2020-11-06 23:03:37,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:37,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:37,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381823232] [2020-11-06 23:03:37,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:37,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:37,800 INFO L87 Difference]: Start difference. First operand 16122 states and 24743 transitions. Second operand 4 states. [2020-11-06 23:03:50,438 WARN L194 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:03:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:53,755 INFO L93 Difference]: Finished difference Result 45677 states and 69958 transitions. [2020-11-06 23:03:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:53,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 323 [2020-11-06 23:03:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:53,815 INFO L225 Difference]: With dead ends: 45677 [2020-11-06 23:03:53,815 INFO L226 Difference]: Without dead ends: 29800 [2020-11-06 23:03:53,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29800 states. [2020-11-06 23:03:55,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29800 to 29797. [2020-11-06 23:03:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29797 states. [2020-11-06 23:03:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29797 states to 29797 states and 45411 transitions. [2020-11-06 23:03:55,083 INFO L78 Accepts]: Start accepts. Automaton has 29797 states and 45411 transitions. Word has length 323 [2020-11-06 23:03:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:55,083 INFO L481 AbstractCegarLoop]: Abstraction has 29797 states and 45411 transitions. [2020-11-06 23:03:55,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 29797 states and 45411 transitions. [2020-11-06 23:03:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-06 23:03:55,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:55,130 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] [2020-11-06 23:03:55,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:55,130 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:55,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2094325128, now seen corresponding path program 1 times [2020-11-06 23:03:55,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:55,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184790734] [2020-11-06 23:03:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:57,047 WARN L194 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:03:57,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:57,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184790734] [2020-11-06 23:03:57,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:57,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:57,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507037355] [2020-11-06 23:03:57,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:57,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:57,313 INFO L87 Difference]: Start difference. First operand 29797 states and 45411 transitions. Second operand 5 states. [2020-11-06 23:04:08,889 WARN L194 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:12,409 INFO L93 Difference]: Finished difference Result 87911 states and 133766 transitions. [2020-11-06 23:04:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:12,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-11-06 23:04:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:12,486 INFO L225 Difference]: With dead ends: 87911 [2020-11-06 23:04:12,486 INFO L226 Difference]: Without dead ends: 58173 [2020-11-06 23:04:12,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58173 states. [2020-11-06 23:04:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58173 to 58170. [2020-11-06 23:04:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58170 states. [2020-11-06 23:04:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58170 states to 58170 states and 88008 transitions. [2020-11-06 23:04:15,278 INFO L78 Accepts]: Start accepts. Automaton has 58170 states and 88008 transitions. Word has length 323 [2020-11-06 23:04:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:15,278 INFO L481 AbstractCegarLoop]: Abstraction has 58170 states and 88008 transitions. [2020-11-06 23:04:15,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 58170 states and 88008 transitions. [2020-11-06 23:04:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:04:15,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:15,336 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] [2020-11-06 23:04:15,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:04:15,336 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1348349678, now seen corresponding path program 1 times [2020-11-06 23:04:15,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:15,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41868149] [2020-11-06 23:04:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:17,481 WARN L194 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:04:17,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:17,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41868149] [2020-11-06 23:04:17,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:17,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:17,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156918891] [2020-11-06 23:04:17,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:17,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:17,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:17,739 INFO L87 Difference]: Start difference. First operand 58170 states and 88008 transitions. Second operand 5 states. [2020-11-06 23:04:30,963 WARN L194 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:35,560 INFO L93 Difference]: Finished difference Result 171707 states and 259317 transitions. [2020-11-06 23:04:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:35,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-11-06 23:04:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:35,707 INFO L225 Difference]: With dead ends: 171707 [2020-11-06 23:04:35,707 INFO L226 Difference]: Without dead ends: 113658 [2020-11-06 23:04:35,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:35,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113658 states. [2020-11-06 23:04:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113658 to 113655. [2020-11-06 23:04:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113655 states. [2020-11-06 23:04:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113655 states to 113655 states and 170641 transitions. [2020-11-06 23:04:41,372 INFO L78 Accepts]: Start accepts. Automaton has 113655 states and 170641 transitions. Word has length 325 [2020-11-06 23:04:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:41,372 INFO L481 AbstractCegarLoop]: Abstraction has 113655 states and 170641 transitions. [2020-11-06 23:04:41,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 113655 states and 170641 transitions. [2020-11-06 23:04:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:04:41,725 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:41,725 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] [2020-11-06 23:04:41,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:04:41,726 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash -668437036, now seen corresponding path program 1 times [2020-11-06 23:04:41,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:41,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759492401] [2020-11-06 23:04:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:43,675 WARN L194 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:04:43,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:43,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759492401] [2020-11-06 23:04:43,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:43,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:43,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068311083] [2020-11-06 23:04:43,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:43,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:43,907 INFO L87 Difference]: Start difference. First operand 113655 states and 170641 transitions. Second operand 5 states. [2020-11-06 23:05:01,059 WARN L194 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:05:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:07,458 INFO L93 Difference]: Finished difference Result 335883 states and 503456 transitions. [2020-11-06 23:05:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:05:07,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-11-06 23:05:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:07,793 INFO L225 Difference]: With dead ends: 335883 [2020-11-06 23:05:07,794 INFO L226 Difference]: Without dead ends: 222462 [2020-11-06 23:05:08,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222462 states. [2020-11-06 23:05:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222462 to 222459. [2020-11-06 23:05:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222459 states. [2020-11-06 23:05:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222459 states to 222459 states and 331549 transitions. [2020-11-06 23:05:19,886 INFO L78 Accepts]: Start accepts. Automaton has 222459 states and 331549 transitions. Word has length 325 [2020-11-06 23:05:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:19,887 INFO L481 AbstractCegarLoop]: Abstraction has 222459 states and 331549 transitions. [2020-11-06 23:05:19,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 222459 states and 331549 transitions. [2020-11-06 23:05:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:05:20,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:20,395 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] [2020-11-06 23:05:20,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:05:20,395 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1739212502, now seen corresponding path program 1 times [2020-11-06 23:05:20,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:20,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484892796] [2020-11-06 23:05:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:22,265 WARN L194 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:05:22,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:22,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484892796] [2020-11-06 23:05:22,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:22,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:22,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425707880] [2020-11-06 23:05:22,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:22,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:22,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:22,561 INFO L87 Difference]: Start difference. First operand 222459 states and 331549 transitions. Second operand 4 states. [2020-11-06 23:05:47,629 WARN L194 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 312 [2020-11-06 23:05:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:57,578 INFO L93 Difference]: Finished difference Result 656657 states and 976727 transitions. [2020-11-06 23:05:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:05:57,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:05:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:58,571 INFO L225 Difference]: With dead ends: 656657 [2020-11-06 23:05:58,571 INFO L226 Difference]: Without dead ends: 435582 [2020-11-06 23:05:58,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435582 states. [2020-11-06 23:06:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435582 to 435579. [2020-11-06 23:06:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435579 states. [2020-11-06 23:06:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435579 states to 435579 states and 644315 transitions. [2020-11-06 23:06:22,656 INFO L78 Accepts]: Start accepts. Automaton has 435579 states and 644315 transitions. Word has length 327 [2020-11-06 23:06:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:22,656 INFO L481 AbstractCegarLoop]: Abstraction has 435579 states and 644315 transitions. [2020-11-06 23:06:22,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:22,656 INFO L276 IsEmpty]: Start isEmpty. Operand 435579 states and 644315 transitions. [2020-11-06 23:06:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:06:23,653 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:23,654 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] [2020-11-06 23:06:23,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:06:23,654 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:23,655 INFO L82 PathProgramCache]: Analyzing trace with hash -392466747, now seen corresponding path program 1 times [2020-11-06 23:06:23,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:23,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827687922] [2020-11-06 23:06:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:25,553 WARN L194 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 307 [2020-11-06 23:06:25,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:25,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827687922] [2020-11-06 23:06:25,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:25,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:25,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817201455] [2020-11-06 23:06:25,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:25,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:25,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:25,874 INFO L87 Difference]: Start difference. First operand 435579 states and 644315 transitions. Second operand 4 states.