/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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:00:35,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:00:35,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:00:35,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 23:00:35,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:00:35,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:00:35,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:00:35,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:00:35,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:00:35,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:00:35,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:00:35,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:00:35,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:00:35,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:00:35,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:00:35,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:00:35,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:00:35,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:00:35,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:00:35,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:00:35,991 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 23:00:36,037 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:00:36,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:00:36,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:00:36,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:00:36,042 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:00:36,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:00:36,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:00:36,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:00:36,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:00:36,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:00:36,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:00:36,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:00:36,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:00:36,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:00:36,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:00:36,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:00:36,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:00:36,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:00:36,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:00:36,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:00:36,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:00:36,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:00:36,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:00:36,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:00:36,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:00:36,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:00:36,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:00:36,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:00:36,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:00:36,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:00:36,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:00:36,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:00:36,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:00:36,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:00:36,497 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:00:36,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:00:36,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307f560b4/139ffac90c2d4f8a8156a167c6721644/FLAG04f415eec [2020-11-06 23:00:37,555 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:00:37,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:00:37,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307f560b4/139ffac90c2d4f8a8156a167c6721644/FLAG04f415eec [2020-11-06 23:00:37,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/307f560b4/139ffac90c2d4f8a8156a167c6721644 [2020-11-06 23:00:37,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:00:37,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:00:37,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:00:37,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:00:37,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:00:37,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:37" (1/1) ... [2020-11-06 23:00:37,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63443748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:37, skipping insertion in model container [2020-11-06 23:00:37,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:00:37" (1/1) ... [2020-11-06 23:00:37,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:00:37,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:00:39,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:00:39,410 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:00:40,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:00:40,214 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:00:40,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40 WrapperNode [2020-11-06 23:00:40,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:00:40,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:00:40,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:00:40,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:00:40,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (1/1) ... [2020-11-06 23:00:40,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (1/1) ... [2020-11-06 23:00:40,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (1/1) ... [2020-11-06 23:00:40,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (1/1) ... [2020-11-06 23:00:40,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (1/1) ... [2020-11-06 23:00:40,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (1/1) ... [2020-11-06 23:00:40,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (1/1) ... [2020-11-06 23:00:40,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:00:40,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:00:40,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:00:40,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:00:40,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (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 23:00:40,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:00:40,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:00:40,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:00:40,550 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:00:40,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:00:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:00:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:00:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:00:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:00:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:00:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:00:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:00:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:00:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:00:40,552 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:00:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:00:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:00:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:00:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:00:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:00:40,553 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:00:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:00:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:00:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:00:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:00:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:00:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:00:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:00:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:00:40,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:00:44,711 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:00:44,711 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:00:44,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:44 BoogieIcfgContainer [2020-11-06 23:00:44,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:00:44,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:00:44,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:00:44,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:00:44,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:00:37" (1/3) ... [2020-11-06 23:00:44,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1235929f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:44, skipping insertion in model container [2020-11-06 23:00:44,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:00:40" (2/3) ... [2020-11-06 23:00:44,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1235929f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:00:44, skipping insertion in model container [2020-11-06 23:00:44,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:00:44" (3/3) ... [2020-11-06 23:00:44,724 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-11-06 23:00:44,739 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:00:44,743 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:00:44,756 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:00:44,789 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:00:44,789 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:00:44,789 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:00:44,789 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:00:44,789 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:00:44,789 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:00:44,790 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:00:44,790 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:00:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states. [2020-11-06 23:00:44,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-11-06 23:00:44,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:00:44,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:00:44,872 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:00:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:00:44,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1030577711, now seen corresponding path program 1 times [2020-11-06 23:00:44,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:00:44,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063768564] [2020-11-06 23:00:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:00:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:47,574 WARN L194 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:00:47,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:00:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:00:48,140 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 23:00:48,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063768564] [2020-11-06 23:00:48,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:00:48,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:00:48,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687062411] [2020-11-06 23:00:48,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:00:48,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:00:48,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:00:48,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:00:48,185 INFO L87 Difference]: Start difference. First operand 1344 states. Second operand 4 states. [2020-11-06 23:00:49,583 WARN L194 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 413 [2020-11-06 23:01:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:00,036 INFO L93 Difference]: Finished difference Result 2268 states and 4040 transitions. [2020-11-06 23:01:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:01:00,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-11-06 23:01:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:00,080 INFO L225 Difference]: With dead ends: 2268 [2020-11-06 23:01:00,080 INFO L226 Difference]: Without dead ends: 1995 [2020-11-06 23:01:00,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:01:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2020-11-06 23:01:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1992. [2020-11-06 23:01:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2020-11-06 23:01:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 3231 transitions. [2020-11-06 23:01:00,269 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 3231 transitions. Word has length 477 [2020-11-06 23:01:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:00,272 INFO L481 AbstractCegarLoop]: Abstraction has 1992 states and 3231 transitions. [2020-11-06 23:01:00,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:01:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 3231 transitions. [2020-11-06 23:01:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-11-06 23:01:00,284 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:00,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:00,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:01:00,285 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash 985269987, now seen corresponding path program 1 times [2020-11-06 23:01:00,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:00,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611956632] [2020-11-06 23:01:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:02,737 WARN L194 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:01:02,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:03,212 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 23:01:03,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611956632] [2020-11-06 23:01:03,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:03,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:01:03,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011286465] [2020-11-06 23:01:03,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:01:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:01:03,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:01:03,217 INFO L87 Difference]: Start difference. First operand 1992 states and 3231 transitions. Second operand 5 states. [2020-11-06 23:01:16,846 WARN L194 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:01:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:19,630 INFO L93 Difference]: Finished difference Result 5907 states and 9582 transitions. [2020-11-06 23:01:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:01:19,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-11-06 23:01:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:19,659 INFO L225 Difference]: With dead ends: 5907 [2020-11-06 23:01:19,659 INFO L226 Difference]: Without dead ends: 3932 [2020-11-06 23:01:19,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:01:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2020-11-06 23:01:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3929. [2020-11-06 23:01:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3929 states. [2020-11-06 23:01:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 6349 transitions. [2020-11-06 23:01:19,842 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 6349 transitions. Word has length 477 [2020-11-06 23:01:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:19,843 INFO L481 AbstractCegarLoop]: Abstraction has 3929 states and 6349 transitions. [2020-11-06 23:01:19,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:01:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 6349 transitions. [2020-11-06 23:01:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-11-06 23:01:19,859 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:19,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:19,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:01:19,860 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1610888374, now seen corresponding path program 1 times [2020-11-06 23:01:19,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:19,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272303833] [2020-11-06 23:01:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:21,340 WARN L194 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:01:21,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:21,666 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 23:01:21,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272303833] [2020-11-06 23:01:21,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:21,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823528298] [2020-11-06 23:01:21,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:21,669 INFO L87 Difference]: Start difference. First operand 3929 states and 6349 transitions. Second operand 4 states. [2020-11-06 23:01:37,849 WARN L194 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 417 [2020-11-06 23:01:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:01:40,582 INFO L93 Difference]: Finished difference Result 11485 states and 18516 transitions. [2020-11-06 23:01:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:01:40,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-11-06 23:01:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:01:40,622 INFO L225 Difference]: With dead ends: 11485 [2020-11-06 23:01:40,622 INFO L226 Difference]: Without dead ends: 7770 [2020-11-06 23:01:40,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:01:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7770 states. [2020-11-06 23:01:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7770 to 7767. [2020-11-06 23:01:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7767 states. [2020-11-06 23:01:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7767 states to 7767 states and 12510 transitions. [2020-11-06 23:01:40,986 INFO L78 Accepts]: Start accepts. Automaton has 7767 states and 12510 transitions. Word has length 479 [2020-11-06 23:01:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:01:40,987 INFO L481 AbstractCegarLoop]: Abstraction has 7767 states and 12510 transitions. [2020-11-06 23:01:40,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:01:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 7767 states and 12510 transitions. [2020-11-06 23:01:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-11-06 23:01:41,018 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:41,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:01:41,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:01:41,019 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:41,020 INFO L82 PathProgramCache]: Analyzing trace with hash 418576747, now seen corresponding path program 1 times [2020-11-06 23:01:41,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:41,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764180514] [2020-11-06 23:01:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:42,334 WARN L194 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:01:42,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:42,594 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 23:01:42,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764180514] [2020-11-06 23:01:42,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:42,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:42,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598665992] [2020-11-06 23:01:42,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:42,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:42,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:42,596 INFO L87 Difference]: Start difference. First operand 7767 states and 12510 transitions. Second operand 4 states. [2020-11-06 23:02:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:00,358 INFO L93 Difference]: Finished difference Result 23202 states and 37361 transitions. [2020-11-06 23:02:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:00,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-11-06 23:02:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:00,438 INFO L225 Difference]: With dead ends: 23202 [2020-11-06 23:02:00,438 INFO L226 Difference]: Without dead ends: 15487 [2020-11-06 23:02:00,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-11-06 23:02:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7814. [2020-11-06 23:02:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7814 states. [2020-11-06 23:02:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 12584 transitions. [2020-11-06 23:02:00,964 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 12584 transitions. Word has length 480 [2020-11-06 23:02:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:00,965 INFO L481 AbstractCegarLoop]: Abstraction has 7814 states and 12584 transitions. [2020-11-06 23:02:00,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 12584 transitions. [2020-11-06 23:02:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-11-06 23:02:00,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:00,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:00,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:02:00,990 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash -410388017, now seen corresponding path program 1 times [2020-11-06 23:02:00,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:00,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398957954] [2020-11-06 23:02:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:02,450 WARN L194 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:02:02,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:02,796 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 23:02:02,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398957954] [2020-11-06 23:02:02,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:02,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842827318] [2020-11-06 23:02:02,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:02,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:02,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:02,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:02,799 INFO L87 Difference]: Start difference. First operand 7814 states and 12584 transitions. Second operand 4 states. [2020-11-06 23:02:19,202 WARN L194 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 417 [2020-11-06 23:02:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:21,952 INFO L93 Difference]: Finished difference Result 22719 states and 36479 transitions. [2020-11-06 23:02:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:21,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-11-06 23:02:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:21,988 INFO L225 Difference]: With dead ends: 22719 [2020-11-06 23:02:21,988 INFO L226 Difference]: Without dead ends: 15304 [2020-11-06 23:02:22,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15304 states. [2020-11-06 23:02:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15304 to 15301. [2020-11-06 23:02:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15301 states. [2020-11-06 23:02:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15301 states to 15301 states and 24522 transitions. [2020-11-06 23:02:22,648 INFO L78 Accepts]: Start accepts. Automaton has 15301 states and 24522 transitions. Word has length 481 [2020-11-06 23:02:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:22,649 INFO L481 AbstractCegarLoop]: Abstraction has 15301 states and 24522 transitions. [2020-11-06 23:02:22,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 15301 states and 24522 transitions. [2020-11-06 23:02:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-11-06 23:02:22,680 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:22,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:22,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:02:22,684 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash -983986710, now seen corresponding path program 1 times [2020-11-06 23:02:22,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:22,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427900910] [2020-11-06 23:02:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:24,053 WARN L194 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:02:24,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:24,201 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 23:02:24,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427900910] [2020-11-06 23:02:24,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:24,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:24,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486361797] [2020-11-06 23:02:24,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:24,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:24,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:24,204 INFO L87 Difference]: Start difference. First operand 15301 states and 24522 transitions. Second operand 4 states. [2020-11-06 23:02:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:42,993 INFO L93 Difference]: Finished difference Result 45645 states and 73120 transitions. [2020-11-06 23:02:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:42,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2020-11-06 23:02:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:43,056 INFO L225 Difference]: With dead ends: 45645 [2020-11-06 23:02:43,057 INFO L226 Difference]: Without dead ends: 30488 [2020-11-06 23:02:43,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30488 states. [2020-11-06 23:02:43,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30488 to 15399. [2020-11-06 23:02:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15399 states. [2020-11-06 23:02:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 24673 transitions. [2020-11-06 23:02:43,870 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 24673 transitions. Word has length 481 [2020-11-06 23:02:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:43,870 INFO L481 AbstractCegarLoop]: Abstraction has 15399 states and 24673 transitions. [2020-11-06 23:02:43,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 24673 transitions. [2020-11-06 23:02:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-11-06 23:02:43,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:43,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:02:43,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:02:43,898 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:43,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1130257274, now seen corresponding path program 1 times [2020-11-06 23:02:43,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:43,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570127458] [2020-11-06 23:02:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:45,197 WARN L194 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:02:45,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:45,483 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 23:02:45,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570127458] [2020-11-06 23:02:45,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:45,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:45,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656471374] [2020-11-06 23:02:45,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:45,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:45,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:45,486 INFO L87 Difference]: Start difference. First operand 15399 states and 24673 transitions. Second operand 4 states. [2020-11-06 23:03:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:04,863 INFO L93 Difference]: Finished difference Result 45780 states and 73301 transitions. [2020-11-06 23:03:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:04,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-11-06 23:03:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:04,916 INFO L225 Difference]: With dead ends: 45780 [2020-11-06 23:03:04,916 INFO L226 Difference]: Without dead ends: 30605 [2020-11-06 23:03:05,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2020-11-06 23:03:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 15516. [2020-11-06 23:03:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15516 states. [2020-11-06 23:03:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15516 states to 15516 states and 24819 transitions. [2020-11-06 23:03:05,881 INFO L78 Accepts]: Start accepts. Automaton has 15516 states and 24819 transitions. Word has length 482 [2020-11-06 23:03:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:05,882 INFO L481 AbstractCegarLoop]: Abstraction has 15516 states and 24819 transitions. [2020-11-06 23:03:05,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 15516 states and 24819 transitions. [2020-11-06 23:03:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-11-06 23:03:05,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:05,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:05,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:05,910 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash 86246452, now seen corresponding path program 1 times [2020-11-06 23:03:05,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:05,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540155503] [2020-11-06 23:03:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:07,375 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:03:07,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:07,793 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 23:03:07,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540155503] [2020-11-06 23:03:07,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:07,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:07,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181841028] [2020-11-06 23:03:07,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:07,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:07,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:07,796 INFO L87 Difference]: Start difference. First operand 15516 states and 24819 transitions. Second operand 4 states. [2020-11-06 23:03:25,692 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 417 [2020-11-06 23:03:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:28,786 INFO L93 Difference]: Finished difference Result 44737 states and 71396 transitions. [2020-11-06 23:03:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:28,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-11-06 23:03:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:28,826 INFO L225 Difference]: With dead ends: 44737 [2020-11-06 23:03:28,827 INFO L226 Difference]: Without dead ends: 30190 [2020-11-06 23:03:28,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:28,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30190 states. [2020-11-06 23:03:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30190 to 30187. [2020-11-06 23:03:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30187 states. [2020-11-06 23:03:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30187 states to 30187 states and 48060 transitions. [2020-11-06 23:03:30,086 INFO L78 Accepts]: Start accepts. Automaton has 30187 states and 48060 transitions. Word has length 483 [2020-11-06 23:03:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:30,087 INFO L481 AbstractCegarLoop]: Abstraction has 30187 states and 48060 transitions. [2020-11-06 23:03:30,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30187 states and 48060 transitions. [2020-11-06 23:03:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-11-06 23:03:30,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:30,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:30,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:30,122 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1450944503, now seen corresponding path program 1 times [2020-11-06 23:03:30,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:30,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443915566] [2020-11-06 23:03:30,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:32,420 WARN L194 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:03:32,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:32,853 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 23:03:32,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443915566] [2020-11-06 23:03:32,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:32,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:32,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736251310] [2020-11-06 23:03:32,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:32,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:32,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:32,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:32,859 INFO L87 Difference]: Start difference. First operand 30187 states and 48060 transitions. Second operand 5 states. [2020-11-06 23:03:48,526 WARN L194 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:03:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:52,029 INFO L93 Difference]: Finished difference Result 88873 states and 141440 transitions. [2020-11-06 23:03:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:52,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 483 [2020-11-06 23:03:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:52,109 INFO L225 Difference]: With dead ends: 88873 [2020-11-06 23:03:52,110 INFO L226 Difference]: Without dead ends: 58904 [2020-11-06 23:03:52,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58904 states. [2020-11-06 23:03:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58904 to 58901. [2020-11-06 23:03:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58901 states. [2020-11-06 23:03:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58901 states to 58901 states and 93323 transitions. [2020-11-06 23:03:55,154 INFO L78 Accepts]: Start accepts. Automaton has 58901 states and 93323 transitions. Word has length 483 [2020-11-06 23:03:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:55,154 INFO L481 AbstractCegarLoop]: Abstraction has 58901 states and 93323 transitions. [2020-11-06 23:03:55,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 58901 states and 93323 transitions. [2020-11-06 23:03:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-11-06 23:03:55,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:55,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:03:55,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:03:55,218 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 677919546, now seen corresponding path program 1 times [2020-11-06 23:03:55,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:55,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392845872] [2020-11-06 23:03:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:56,787 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:03:56,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:57,340 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 23:03:57,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392845872] [2020-11-06 23:03:57,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:57,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:57,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657519981] [2020-11-06 23:03:57,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:57,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:57,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:57,343 INFO L87 Difference]: Start difference. First operand 58901 states and 93323 transitions. Second operand 4 states. [2020-11-06 23:04:18,697 WARN L194 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 417 [2020-11-06 23:04:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:22,765 INFO L93 Difference]: Finished difference Result 173521 states and 274692 transitions. [2020-11-06 23:04:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:22,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-11-06 23:04:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:22,913 INFO L225 Difference]: With dead ends: 173521 [2020-11-06 23:04:22,913 INFO L226 Difference]: Without dead ends: 116162 [2020-11-06 23:04:22,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116162 states. [2020-11-06 23:04:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116162 to 116159. [2020-11-06 23:04:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116159 states. [2020-11-06 23:04:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116159 states to 116159 states and 183305 transitions. [2020-11-06 23:04:29,135 INFO L78 Accepts]: Start accepts. Automaton has 116159 states and 183305 transitions. Word has length 485 [2020-11-06 23:04:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:29,137 INFO L481 AbstractCegarLoop]: Abstraction has 116159 states and 183305 transitions. [2020-11-06 23:04:29,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 116159 states and 183305 transitions. [2020-11-06 23:04:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-11-06 23:04:29,518 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:29,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:04:29,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:04:29,519 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 727190402, now seen corresponding path program 1 times [2020-11-06 23:04:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:29,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401003446] [2020-11-06 23:04:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:31,541 WARN L194 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:04:31,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:31,967 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 23:04:31,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401003446] [2020-11-06 23:04:31,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:31,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:31,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737304677] [2020-11-06 23:04:31,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:31,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:31,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:31,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:31,970 INFO L87 Difference]: Start difference. First operand 116159 states and 183305 transitions. Second operand 5 states. [2020-11-06 23:04:54,663 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:05:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:00,360 INFO L93 Difference]: Finished difference Result 344639 states and 543774 transitions. [2020-11-06 23:05:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:05:00,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2020-11-06 23:05:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:00,687 INFO L225 Difference]: With dead ends: 344639 [2020-11-06 23:05:00,687 INFO L226 Difference]: Without dead ends: 228817 [2020-11-06 23:05:00,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228817 states. [2020-11-06 23:05:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228817 to 228814. [2020-11-06 23:05:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228814 states. [2020-11-06 23:05:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228814 states to 228814 states and 359455 transitions. [2020-11-06 23:05:13,607 INFO L78 Accepts]: Start accepts. Automaton has 228814 states and 359455 transitions. Word has length 487 [2020-11-06 23:05:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:13,607 INFO L481 AbstractCegarLoop]: Abstraction has 228814 states and 359455 transitions. [2020-11-06 23:05:13,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 228814 states and 359455 transitions. [2020-11-06 23:05:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-11-06 23:05:13,860 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:13,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:13,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:05:13,861 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:13,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:13,861 INFO L82 PathProgramCache]: Analyzing trace with hash 323831073, now seen corresponding path program 1 times [2020-11-06 23:05:13,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:13,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163141591] [2020-11-06 23:05:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:15,963 WARN L194 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:05:15,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:16,402 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 23:05:16,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163141591] [2020-11-06 23:05:16,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:16,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:05:16,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507428338] [2020-11-06 23:05:16,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:05:16,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:16,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:05:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:16,405 INFO L87 Difference]: Start difference. First operand 228814 states and 359455 transitions. Second operand 5 states. [2020-11-06 23:05:48,486 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 418 [2020-11-06 23:05:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:57,234 INFO L93 Difference]: Finished difference Result 679806 states and 1067625 transitions. [2020-11-06 23:05:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:05:57,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 489 [2020-11-06 23:05:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:58,211 INFO L225 Difference]: With dead ends: 679806 [2020-11-06 23:05:58,211 INFO L226 Difference]: Without dead ends: 451843 [2020-11-06 23:05:58,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451843 states. [2020-11-06 23:06:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451843 to 451840. [2020-11-06 23:06:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451840 states. [2020-11-06 23:06:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451840 states to 451840 states and 706561 transitions. [2020-11-06 23:06:26,388 INFO L78 Accepts]: Start accepts. Automaton has 451840 states and 706561 transitions. Word has length 489 [2020-11-06 23:06:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:26,389 INFO L481 AbstractCegarLoop]: Abstraction has 451840 states and 706561 transitions. [2020-11-06 23:06:26,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:06:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 451840 states and 706561 transitions. [2020-11-06 23:06:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-11-06 23:06:27,110 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:27,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:27,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:06:27,111 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:27,111 INFO L82 PathProgramCache]: Analyzing trace with hash 646411240, now seen corresponding path program 1 times [2020-11-06 23:06:27,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:27,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676888942] [2020-11-06 23:06:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:29,112 WARN L194 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 412 [2020-11-06 23:06:29,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:29,648 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 23:06:29,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676888942] [2020-11-06 23:06:29,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:29,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:29,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213329356] [2020-11-06 23:06:29,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:29,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:29,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:29,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:29,654 INFO L87 Difference]: Start difference. First operand 451840 states and 706561 transitions. Second operand 4 states.