/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:48:17,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:48:17,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:48:18,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:48:18,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:48:18,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:48:18,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:48:18,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:48:18,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:48:18,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:48:18,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:48:18,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:48:18,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:48:18,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:48:18,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:48:18,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:48:18,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:48:18,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:48:18,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:48:18,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:48:18,123 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 [2021-02-21 16:48:18,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:48:18,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:48:18,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:48:18,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:48:18,184 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:48:18,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:48:18,185 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:48:18,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:48:18,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:48:18,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:48:18,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:48:18,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:48:18,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:48:18,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:48:18,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:48:18,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:48:18,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:48:18,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:48:18,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:48:18,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:48:18,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:48:18,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:48:18,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:48:18,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:48:18,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:48:18,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:48:18,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:48:18,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:48:18,191 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:48:18,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:48:18,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:48:18,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:48:18,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:48:18,705 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:48:18,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-21 16:48:18,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b9e4683/c6c79864ab1b4fa18621773a3180ccdc/FLAG4b141a240 [2021-02-21 16:48:19,705 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:48:19,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-21 16:48:19,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b9e4683/c6c79864ab1b4fa18621773a3180ccdc/FLAG4b141a240 [2021-02-21 16:48:19,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b9e4683/c6c79864ab1b4fa18621773a3180ccdc [2021-02-21 16:48:19,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:48:19,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:48:19,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:48:19,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:48:19,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:48:19,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:48:19" (1/1) ... [2021-02-21 16:48:19,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e97f8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:19, skipping insertion in model container [2021-02-21 16:48:19,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:48:19" (1/1) ... [2021-02-21 16:48:19,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:48:19,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:48:20,654 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34819,34832] [2021-02-21 16:48:20,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:48:20,876 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:48:21,176 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34819,34832] [2021-02-21 16:48:21,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:48:21,346 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:48:21,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21 WrapperNode [2021-02-21 16:48:21,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:48:21,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:48:21,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:48:21,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:48:21,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (1/1) ... [2021-02-21 16:48:21,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (1/1) ... [2021-02-21 16:48:21,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (1/1) ... [2021-02-21 16:48:21,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (1/1) ... [2021-02-21 16:48:21,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (1/1) ... [2021-02-21 16:48:21,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (1/1) ... [2021-02-21 16:48:21,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (1/1) ... [2021-02-21 16:48:21,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:48:21,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:48:21,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:48:21,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:48:21,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (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 [2021-02-21 16:48:21,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:48:21,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:48:21,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:48:21,683 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:48:21,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:48:21,683 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:48:21,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:48:21,684 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:48:21,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:48:21,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 16:48:21,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 16:48:21,684 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-21 16:48:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:48:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-21 16:48:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-21 16:48:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-21 16:48:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-21 16:48:21,685 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-21 16:48:21,686 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-21 16:48:21,686 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 16:48:21,686 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 16:48:21,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:48:21,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:48:21,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:48:21,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:48:21,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:48:21,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:48:21,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:48:24,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:48:24,328 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:48:24,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:48:24 BoogieIcfgContainer [2021-02-21 16:48:24,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:48:24,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:48:24,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:48:24,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:48:24,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:48:19" (1/3) ... [2021-02-21 16:48:24,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312c39ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:48:24, skipping insertion in model container [2021-02-21 16:48:24,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:48:21" (2/3) ... [2021-02-21 16:48:24,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@312c39ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:48:24, skipping insertion in model container [2021-02-21 16:48:24,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:48:24" (3/3) ... [2021-02-21 16:48:24,345 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-21 16:48:24,354 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:48:24,361 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:48:24,383 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:48:24,440 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:48:24,440 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:48:24,440 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:48:24,440 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:48:24,441 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:48:24,441 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:48:24,441 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:48:24,441 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:48:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2021-02-21 16:48:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:48:24,547 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:24,548 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] [2021-02-21 16:48:24,549 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1870510118, now seen corresponding path program 1 times [2021-02-21 16:48:24,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:24,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246301682] [2021-02-21 16:48:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:25,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:25,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:25,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:25,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:48:25,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:25,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:26,372 WARN L202 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:48:26,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:26,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:26,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:48:26,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246301682] [2021-02-21 16:48:26,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:26,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:48:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92813361] [2021-02-21 16:48:26,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:48:26,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:48:26,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:48:26,644 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2021-02-21 16:48:27,367 WARN L202 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-21 16:48:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:32,705 INFO L93 Difference]: Finished difference Result 1490 states and 2621 transitions. [2021-02-21 16:48:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:32,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-21 16:48:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:32,741 INFO L225 Difference]: With dead ends: 1490 [2021-02-21 16:48:32,741 INFO L226 Difference]: Without dead ends: 1284 [2021-02-21 16:48:32,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:48:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-02-21 16:48:32,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1282. [2021-02-21 16:48:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2021-02-21 16:48:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2005 transitions. [2021-02-21 16:48:32,900 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2005 transitions. Word has length 324 [2021-02-21 16:48:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:48:32,902 INFO L480 AbstractCegarLoop]: Abstraction has 1282 states and 2005 transitions. [2021-02-21 16:48:32,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:48:32,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2005 transitions. [2021-02-21 16:48:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:48:32,909 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:32,909 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] [2021-02-21 16:48:32,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:48:32,910 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash -127429012, now seen corresponding path program 1 times [2021-02-21 16:48:32,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:32,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706513026] [2021-02-21 16:48:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:33,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:33,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:33,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:33,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:48:33,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:33,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:33,974 WARN L202 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:48:33,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:34,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:34,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:48:34,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706513026] [2021-02-21 16:48:34,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:34,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:48:34,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963171901] [2021-02-21 16:48:34,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:48:34,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:34,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:48:34,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:48:34,186 INFO L87 Difference]: Start difference. First operand 1282 states and 2005 transitions. Second operand 4 states. [2021-02-21 16:48:34,924 WARN L202 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-21 16:48:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:39,431 INFO L93 Difference]: Finished difference Result 2612 states and 4118 transitions. [2021-02-21 16:48:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:39,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-21 16:48:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:39,455 INFO L225 Difference]: With dead ends: 2612 [2021-02-21 16:48:39,456 INFO L226 Difference]: Without dead ends: 2248 [2021-02-21 16:48:39,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:48:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-02-21 16:48:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2246. [2021-02-21 16:48:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2246 states. [2021-02-21 16:48:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 3507 transitions. [2021-02-21 16:48:39,607 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 3507 transitions. Word has length 324 [2021-02-21 16:48:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:48:39,609 INFO L480 AbstractCegarLoop]: Abstraction has 2246 states and 3507 transitions. [2021-02-21 16:48:39,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:48:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 3507 transitions. [2021-02-21 16:48:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:48:39,623 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:39,624 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] [2021-02-21 16:48:39,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:48:39,625 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:39,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash -941789149, now seen corresponding path program 1 times [2021-02-21 16:48:39,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:39,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352354033] [2021-02-21 16:48:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:39,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:39,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:39,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:39,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:48:39,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:39,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:40,611 WARN L202 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:48:40,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:40,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:40,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:48:40,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352354033] [2021-02-21 16:48:40,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:40,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:48:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152202267] [2021-02-21 16:48:40,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:48:40,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:40,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:48:40,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:48:40,852 INFO L87 Difference]: Start difference. First operand 2246 states and 3507 transitions. Second operand 4 states. [2021-02-21 16:48:41,531 WARN L202 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-21 16:48:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:45,923 INFO L93 Difference]: Finished difference Result 4822 states and 7593 transitions. [2021-02-21 16:48:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:45,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-21 16:48:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:45,948 INFO L225 Difference]: With dead ends: 4822 [2021-02-21 16:48:45,948 INFO L226 Difference]: Without dead ends: 4140 [2021-02-21 16:48:45,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:48:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2021-02-21 16:48:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 4138. [2021-02-21 16:48:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4138 states. [2021-02-21 16:48:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 6447 transitions. [2021-02-21 16:48:46,116 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 6447 transitions. Word has length 324 [2021-02-21 16:48:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:48:46,117 INFO L480 AbstractCegarLoop]: Abstraction has 4138 states and 6447 transitions. [2021-02-21 16:48:46,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:48:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 6447 transitions. [2021-02-21 16:48:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:48:46,129 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:46,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:48:46,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:48:46,132 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1072121675, now seen corresponding path program 1 times [2021-02-21 16:48:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:46,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867275591] [2021-02-21 16:48:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:46,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:46,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:46,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:46,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:48:46,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:46,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:47,144 WARN L202 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:48:47,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:47,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:47,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:48:47,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867275591] [2021-02-21 16:48:47,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:47,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:48:47,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725394831] [2021-02-21 16:48:47,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:48:47,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:47,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:48:47,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:48:47,342 INFO L87 Difference]: Start difference. First operand 4138 states and 6447 transitions. Second operand 4 states. [2021-02-21 16:48:48,040 WARN L202 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-21 16:48:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:48:52,442 INFO L93 Difference]: Finished difference Result 9126 states and 14341 transitions. [2021-02-21 16:48:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:48:52,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-21 16:48:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:48:52,484 INFO L225 Difference]: With dead ends: 9126 [2021-02-21 16:48:52,485 INFO L226 Difference]: Without dead ends: 7852 [2021-02-21 16:48:52,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:48:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2021-02-21 16:48:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 7850. [2021-02-21 16:48:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7850 states. [2021-02-21 16:48:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7850 states to 7850 states and 12199 transitions. [2021-02-21 16:48:52,782 INFO L78 Accepts]: Start accepts. Automaton has 7850 states and 12199 transitions. Word has length 324 [2021-02-21 16:48:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:48:52,783 INFO L480 AbstractCegarLoop]: Abstraction has 7850 states and 12199 transitions. [2021-02-21 16:48:52,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:48:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 7850 states and 12199 transitions. [2021-02-21 16:48:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-21 16:48:52,806 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:48:52,806 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] [2021-02-21 16:48:52,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:48:52,807 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:48:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:48:52,808 INFO L82 PathProgramCache]: Analyzing trace with hash -247456284, now seen corresponding path program 1 times [2021-02-21 16:48:52,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:48:52,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307466907] [2021-02-21 16:48:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:48:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:53,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:53,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:53,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:53,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:48:53,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:53,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:48:53,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:53,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:54,254 WARN L202 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:48:54,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:48:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:48:54,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:48:54,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:48:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:48:54,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307466907] [2021-02-21 16:48:54,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:48:54,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:48:54,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953596667] [2021-02-21 16:48:54,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:48:54,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:48:54,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:48:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:48:54,505 INFO L87 Difference]: Start difference. First operand 7850 states and 12199 transitions. Second operand 5 states. [2021-02-21 16:49:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:49:02,085 INFO L93 Difference]: Finished difference Result 23223 states and 36054 transitions. [2021-02-21 16:49:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:49:02,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2021-02-21 16:49:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:49:02,152 INFO L225 Difference]: With dead ends: 23223 [2021-02-21 16:49:02,153 INFO L226 Difference]: Without dead ends: 15388 [2021-02-21 16:49:02,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:49:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-02-21 16:49:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 15386. [2021-02-21 16:49:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15386 states. [2021-02-21 16:49:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 23772 transitions. [2021-02-21 16:49:02,759 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 23772 transitions. Word has length 324 [2021-02-21 16:49:02,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:49:02,760 INFO L480 AbstractCegarLoop]: Abstraction has 15386 states and 23772 transitions. [2021-02-21 16:49:02,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:49:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 23772 transitions. [2021-02-21 16:49:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-21 16:49:02,789 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:49:02,790 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] [2021-02-21 16:49:02,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:49:02,790 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:49:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:49:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash -41876105, now seen corresponding path program 1 times [2021-02-21 16:49:02,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:49:02,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522023615] [2021-02-21 16:49:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:49:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:02,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:02,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:02,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:02,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:49:02,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:02,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:03,653 WARN L202 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:49:03,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:49:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:03,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:03,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:49:03,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522023615] [2021-02-21 16:49:03,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:49:03,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:49:03,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431519133] [2021-02-21 16:49:03,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:49:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:49:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:49:03,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:03,863 INFO L87 Difference]: Start difference. First operand 15386 states and 23772 transitions. Second operand 4 states. [2021-02-21 16:49:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:49:12,862 INFO L93 Difference]: Finished difference Result 45419 states and 70072 transitions. [2021-02-21 16:49:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:49:12,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-21 16:49:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:49:12,932 INFO L225 Difference]: With dead ends: 45419 [2021-02-21 16:49:12,933 INFO L226 Difference]: Without dead ends: 30162 [2021-02-21 16:49:12,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30162 states. [2021-02-21 16:49:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30162 to 30160. [2021-02-21 16:49:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30160 states. [2021-02-21 16:49:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30160 states to 30160 states and 46321 transitions. [2021-02-21 16:49:13,933 INFO L78 Accepts]: Start accepts. Automaton has 30160 states and 46321 transitions. Word has length 326 [2021-02-21 16:49:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:49:13,934 INFO L480 AbstractCegarLoop]: Abstraction has 30160 states and 46321 transitions. [2021-02-21 16:49:13,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:49:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 30160 states and 46321 transitions. [2021-02-21 16:49:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-21 16:49:13,990 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:49:13,991 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] [2021-02-21 16:49:13,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:49:13,991 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:49:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:49:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2104012548, now seen corresponding path program 1 times [2021-02-21 16:49:13,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:49:13,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587635347] [2021-02-21 16:49:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:49:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:14,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:14,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:14,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:14,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:49:14,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:14,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:14,909 WARN L202 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:49:14,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:49:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:14,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:14,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:49:15,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587635347] [2021-02-21 16:49:15,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:49:15,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:49:15,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32641045] [2021-02-21 16:49:15,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:49:15,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:49:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:49:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:15,106 INFO L87 Difference]: Start difference. First operand 30160 states and 46321 transitions. Second operand 4 states. [2021-02-21 16:49:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:49:24,607 INFO L93 Difference]: Finished difference Result 90405 states and 138839 transitions. [2021-02-21 16:49:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:49:24,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-21 16:49:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:49:24,791 INFO L225 Difference]: With dead ends: 90405 [2021-02-21 16:49:24,792 INFO L226 Difference]: Without dead ends: 60287 [2021-02-21 16:49:24,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60287 states. [2021-02-21 16:49:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60287 to 30179. [2021-02-21 16:49:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30179 states. [2021-02-21 16:49:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30179 states to 30179 states and 46349 transitions. [2021-02-21 16:49:26,471 INFO L78 Accepts]: Start accepts. Automaton has 30179 states and 46349 transitions. Word has length 326 [2021-02-21 16:49:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:49:26,472 INFO L480 AbstractCegarLoop]: Abstraction has 30179 states and 46349 transitions. [2021-02-21 16:49:26,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:49:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30179 states and 46349 transitions. [2021-02-21 16:49:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-02-21 16:49:26,530 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:49:26,530 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] [2021-02-21 16:49:26,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:49:26,531 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:49:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:49:26,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1504278854, now seen corresponding path program 1 times [2021-02-21 16:49:26,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:49:26,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540906766] [2021-02-21 16:49:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:49:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:26,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:26,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:26,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:26,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:49:26,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:26,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:27,496 WARN L202 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:49:27,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:49:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:27,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:27,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:49:27,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540906766] [2021-02-21 16:49:27,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:49:27,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:49:27,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511889260] [2021-02-21 16:49:27,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:49:27,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:49:27,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:49:27,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:27,617 INFO L87 Difference]: Start difference. First operand 30179 states and 46349 transitions. Second operand 4 states. [2021-02-21 16:49:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:49:37,755 INFO L93 Difference]: Finished difference Result 90424 states and 138860 transitions. [2021-02-21 16:49:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:49:37,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2021-02-21 16:49:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:49:37,848 INFO L225 Difference]: With dead ends: 90424 [2021-02-21 16:49:37,848 INFO L226 Difference]: Without dead ends: 60305 [2021-02-21 16:49:37,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60305 states. [2021-02-21 16:49:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60305 to 30197. [2021-02-21 16:49:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30197 states. [2021-02-21 16:49:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30197 states to 30197 states and 46370 transitions. [2021-02-21 16:49:39,526 INFO L78 Accepts]: Start accepts. Automaton has 30197 states and 46370 transitions. Word has length 327 [2021-02-21 16:49:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:49:39,526 INFO L480 AbstractCegarLoop]: Abstraction has 30197 states and 46370 transitions. [2021-02-21 16:49:39,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:49:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 30197 states and 46370 transitions. [2021-02-21 16:49:39,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-21 16:49:39,559 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:49:39,559 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] [2021-02-21 16:49:39,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:49:39,560 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:49:39,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:49:39,560 INFO L82 PathProgramCache]: Analyzing trace with hash -247696078, now seen corresponding path program 1 times [2021-02-21 16:49:39,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:49:39,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562711995] [2021-02-21 16:49:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:49:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:40,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:40,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:40,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:40,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:49:40,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:40,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:40,698 WARN L202 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:49:40,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:49:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:40,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:40,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:49:41,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562711995] [2021-02-21 16:49:41,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:49:41,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:49:41,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282809845] [2021-02-21 16:49:41,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:49:41,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:49:41,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:49:41,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:41,023 INFO L87 Difference]: Start difference. First operand 30197 states and 46370 transitions. Second operand 4 states. [2021-02-21 16:49:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:49:51,202 INFO L93 Difference]: Finished difference Result 85716 states and 131393 transitions. [2021-02-21 16:49:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:49:51,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-21 16:49:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:49:51,264 INFO L225 Difference]: With dead ends: 85716 [2021-02-21 16:49:51,264 INFO L226 Difference]: Without dead ends: 55764 [2021-02-21 16:49:51,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:49:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55764 states. [2021-02-21 16:49:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55764 to 55762. [2021-02-21 16:49:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55762 states. [2021-02-21 16:49:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55762 states to 55762 states and 85028 transitions. [2021-02-21 16:49:53,641 INFO L78 Accepts]: Start accepts. Automaton has 55762 states and 85028 transitions. Word has length 328 [2021-02-21 16:49:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:49:53,642 INFO L480 AbstractCegarLoop]: Abstraction has 55762 states and 85028 transitions. [2021-02-21 16:49:53,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:49:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 55762 states and 85028 transitions. [2021-02-21 16:49:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-21 16:49:53,703 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:49:53,704 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] [2021-02-21 16:49:53,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:49:53,704 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:49:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:49:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1558324239, now seen corresponding path program 1 times [2021-02-21 16:49:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:49:53,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975702946] [2021-02-21 16:49:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:49:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:54,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:54,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:54,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:54,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:49:54,164 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-21 16:49:54,166 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-21 16:49:54,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:54,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:49:54,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:54,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:55,186 WARN L202 SmtUtils]: Spent 958.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:49:55,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:49:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:49:55,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:49:55,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:49:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:49:55,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975702946] [2021-02-21 16:49:55,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:49:55,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:49:55,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448934492] [2021-02-21 16:49:55,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:49:55,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:49:55,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:49:55,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:49:55,433 INFO L87 Difference]: Start difference. First operand 55762 states and 85028 transitions. Second operand 6 states. [2021-02-21 16:50:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:50:06,433 INFO L93 Difference]: Finished difference Result 164666 states and 250697 transitions. [2021-02-21 16:50:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:50:06,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 328 [2021-02-21 16:50:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:50:06,579 INFO L225 Difference]: With dead ends: 164666 [2021-02-21 16:50:06,579 INFO L226 Difference]: Without dead ends: 108963 [2021-02-21 16:50:06,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:50:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108963 states. [2021-02-21 16:50:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108963 to 108961. [2021-02-21 16:50:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108961 states. [2021-02-21 16:50:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108961 states to 108961 states and 164963 transitions. [2021-02-21 16:50:11,820 INFO L78 Accepts]: Start accepts. Automaton has 108961 states and 164963 transitions. Word has length 328 [2021-02-21 16:50:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:50:11,820 INFO L480 AbstractCegarLoop]: Abstraction has 108961 states and 164963 transitions. [2021-02-21 16:50:11,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:50:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 108961 states and 164963 transitions. [2021-02-21 16:50:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-21 16:50:11,899 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:50:11,900 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] [2021-02-21 16:50:11,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:50:11,900 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:50:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:50:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1621319205, now seen corresponding path program 1 times [2021-02-21 16:50:11,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:50:11,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011967775] [2021-02-21 16:50:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:50:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:12,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:12,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:12,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:12,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:50:12,567 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 16:50:12,569 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 16:50:12,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:12,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:50:12,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:12,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:13,351 WARN L202 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:50:13,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:50:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:13,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:13,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:50:13,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011967775] [2021-02-21 16:50:13,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:50:13,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:50:13,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976277806] [2021-02-21 16:50:13,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:50:13,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:50:13,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:50:13,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:50:13,652 INFO L87 Difference]: Start difference. First operand 108961 states and 164963 transitions. Second operand 6 states. [2021-02-21 16:50:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:50:29,067 INFO L93 Difference]: Finished difference Result 321740 states and 486222 transitions. [2021-02-21 16:50:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:50:29,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 330 [2021-02-21 16:50:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:50:29,594 INFO L225 Difference]: With dead ends: 321740 [2021-02-21 16:50:29,594 INFO L226 Difference]: Without dead ends: 212900 [2021-02-21 16:50:29,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:50:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212900 states. [2021-02-21 16:50:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212900 to 212898. [2021-02-21 16:50:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212898 states. [2021-02-21 16:50:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212898 states to 212898 states and 319812 transitions. [2021-02-21 16:50:40,517 INFO L78 Accepts]: Start accepts. Automaton has 212898 states and 319812 transitions. Word has length 330 [2021-02-21 16:50:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:50:40,517 INFO L480 AbstractCegarLoop]: Abstraction has 212898 states and 319812 transitions. [2021-02-21 16:50:40,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:50:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 212898 states and 319812 transitions. [2021-02-21 16:50:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-21 16:50:40,706 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:50:40,706 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] [2021-02-21 16:50:40,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:50:40,707 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:50:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:50:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1045470557, now seen corresponding path program 1 times [2021-02-21 16:50:40,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:50:40,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295261501] [2021-02-21 16:50:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:50:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:41,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:41,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:41,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:41,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:50:41,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:41,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:50:41,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:41,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:42,462 WARN L202 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:50:42,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:50:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:42,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:42,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:50:42,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295261501] [2021-02-21 16:50:42,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:50:42,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:50:42,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156162523] [2021-02-21 16:50:42,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:50:42,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:50:42,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:50:42,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:50:42,806 INFO L87 Difference]: Start difference. First operand 212898 states and 319812 transitions. Second operand 5 states. [2021-02-21 16:51:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:51:07,765 INFO L93 Difference]: Finished difference Result 629292 states and 943769 transitions. [2021-02-21 16:51:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:51:07,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2021-02-21 16:51:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:51:08,728 INFO L225 Difference]: With dead ends: 629292 [2021-02-21 16:51:08,728 INFO L226 Difference]: Without dead ends: 416628 [2021-02-21 16:51:08,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:51:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416628 states. [2021-02-21 16:51:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416628 to 416626. [2021-02-21 16:51:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416626 states. [2021-02-21 16:51:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416626 states to 416626 states and 621252 transitions. [2021-02-21 16:51:29,960 INFO L78 Accepts]: Start accepts. Automaton has 416626 states and 621252 transitions. Word has length 330 [2021-02-21 16:51:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:51:29,961 INFO L480 AbstractCegarLoop]: Abstraction has 416626 states and 621252 transitions. [2021-02-21 16:51:29,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:51:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 416626 states and 621252 transitions. [2021-02-21 16:51:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-21 16:51:30,979 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:51:30,979 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] [2021-02-21 16:51:30,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:51:30,980 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:51:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:51:30,980 INFO L82 PathProgramCache]: Analyzing trace with hash 146928749, now seen corresponding path program 1 times [2021-02-21 16:51:30,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:51:30,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608061686] [2021-02-21 16:51:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:51:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:31,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:31,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:31,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:31,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:51:31,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:31,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:31,872 WARN L202 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-21 16:51:31,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:51:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:31,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:31,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:51:32,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608061686] [2021-02-21 16:51:32,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:51:32,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:51:32,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106092190] [2021-02-21 16:51:32,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:51:32,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:51:32,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:51:32,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:51:32,391 INFO L87 Difference]: Start difference. First operand 416626 states and 621252 transitions. Second operand 4 states.