/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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 14:12:19,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 14:12:19,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 14:12:19,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 14:12:19,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 14:12:19,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 14:12:19,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 14:12:19,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 14:12:19,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 14:12:19,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 14:12:19,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 14:12:19,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 14:12:19,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 14:12:19,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 14:12:19,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 14:12:19,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 14:12:19,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 14:12:19,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 14:12:19,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 14:12:19,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 14:12:19,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 14:12:19,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 14:12:19,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 14:12:19,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 14:12:19,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 14:12:19,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 14:12:19,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 14:12:19,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 14:12:19,646 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 [2021-02-23 14:12:19,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 14:12:19,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 14:12:19,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 14:12:19,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 14:12:19,695 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 14:12:19,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 14:12:19,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 14:12:19,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 14:12:19,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 14:12:19,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 14:12:19,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 14:12:19,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 14:12:19,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 14:12:19,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 14:12:19,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 14:12:19,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 14:12:19,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 14:12:19,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 14:12:19,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 14:12:19,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 14:12:19,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:12:19,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 14:12:19,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 14:12:19,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 14:12:19,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 14:12:19,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 14:12:19,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 14:12:19,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 14:12:19,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 14:12:20,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 14:12:20,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 14:12:20,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 14:12:20,138 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 14:12:20,139 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 14:12:20,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:12:20,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c176e02f3/3ab8e3d5532e47dda5d36e6b313a5af4/FLAGdfa061a94 [2021-02-23 14:12:21,092 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 14:12:21,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:12:21,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c176e02f3/3ab8e3d5532e47dda5d36e6b313a5af4/FLAGdfa061a94 [2021-02-23 14:12:21,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c176e02f3/3ab8e3d5532e47dda5d36e6b313a5af4 [2021-02-23 14:12:21,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 14:12:21,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 14:12:21,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 14:12:21,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 14:12:21,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 14:12:21,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:12:21" (1/1) ... [2021-02-23 14:12:21,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c359a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:21, skipping insertion in model container [2021-02-23 14:12:21,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:12:21" (1/1) ... [2021-02-23 14:12:21,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 14:12:21,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 14:12:22,128 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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34789,34802] [2021-02-23 14:12:22,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:12:22,346 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 14:12:22,662 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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34789,34802] [2021-02-23 14:12:22,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:12:22,840 INFO L208 MainTranslator]: Completed translation [2021-02-23 14:12:22,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22 WrapperNode [2021-02-23 14:12:22,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 14:12:22,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 14:12:22,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 14:12:22,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 14:12:22,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (1/1) ... [2021-02-23 14:12:22,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (1/1) ... [2021-02-23 14:12:22,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (1/1) ... [2021-02-23 14:12:22,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (1/1) ... [2021-02-23 14:12:22,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (1/1) ... [2021-02-23 14:12:23,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (1/1) ... [2021-02-23 14:12:23,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (1/1) ... [2021-02-23 14:12:23,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 14:12:23,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 14:12:23,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 14:12:23,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 14:12:23,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (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 [2021-02-23 14:12:23,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 14:12:23,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 14:12:23,150 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 14:12:23,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 14:12:23,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 14:12:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 14:12:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 14:12:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 14:12:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 14:12:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 14:12:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-23 14:12:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 14:12:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-23 14:12:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 14:12:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-23 14:12:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-23 14:12:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-23 14:12:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-23 14:12:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-23 14:12:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-23 14:12:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 14:12:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 14:12:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 14:12:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 14:12:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 14:12:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 14:12:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 14:12:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 14:12:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 14:12:26,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 14:12:26,490 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 14:12:26,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:12:26 BoogieIcfgContainer [2021-02-23 14:12:26,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 14:12:26,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 14:12:26,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 14:12:26,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 14:12:26,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:12:21" (1/3) ... [2021-02-23 14:12:26,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a84a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:12:26, skipping insertion in model container [2021-02-23 14:12:26,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:22" (2/3) ... [2021-02-23 14:12:26,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a84a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:12:26, skipping insertion in model container [2021-02-23 14:12:26,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:12:26" (3/3) ... [2021-02-23 14:12:26,505 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:12:26,512 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 14:12:26,517 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 14:12:26,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 14:12:26,571 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 14:12:26,571 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 14:12:26,571 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 14:12:26,572 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 14:12:26,572 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 14:12:26,572 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 14:12:26,572 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 14:12:26,572 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 14:12:26,605 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2021-02-23 14:12:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-23 14:12:26,634 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:26,636 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] [2021-02-23 14:12:26,636 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1103650988, now seen corresponding path program 1 times [2021-02-23 14:12:26,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:26,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880209203] [2021-02-23 14:12:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:27,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:27,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:27,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:27,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:12:27,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:27,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:28,755 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:28,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:28,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:28,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:12:29,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880209203] [2021-02-23 14:12:29,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:29,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:29,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094903917] [2021-02-23 14:12:29,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:29,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:29,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:29,047 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2021-02-23 14:12:30,298 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:36,753 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2021-02-23 14:12:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:36,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2021-02-23 14:12:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:36,788 INFO L225 Difference]: With dead ends: 1527 [2021-02-23 14:12:36,789 INFO L226 Difference]: Without dead ends: 1311 [2021-02-23 14:12:36,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-02-23 14:12:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2021-02-23 14:12:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2021-02-23 14:12:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2021-02-23 14:12:36,951 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2021-02-23 14:12:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:36,957 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2021-02-23 14:12:36,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2021-02-23 14:12:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-23 14:12:36,972 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:36,973 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] [2021-02-23 14:12:36,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 14:12:36,974 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:36,975 INFO L82 PathProgramCache]: Analyzing trace with hash -314491150, now seen corresponding path program 1 times [2021-02-23 14:12:36,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:36,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163713143] [2021-02-23 14:12:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:37,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:37,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:37,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:37,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:12:37,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:37,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:38,832 WARN L202 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:38,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:38,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:38,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:12:39,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163713143] [2021-02-23 14:12:39,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:39,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:39,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231489752] [2021-02-23 14:12:39,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:39,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:39,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:39,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:39,077 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2021-02-23 14:12:40,440 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:46,025 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2021-02-23 14:12:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:46,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2021-02-23 14:12:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:46,041 INFO L225 Difference]: With dead ends: 2683 [2021-02-23 14:12:46,042 INFO L226 Difference]: Without dead ends: 2301 [2021-02-23 14:12:46,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-02-23 14:12:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2021-02-23 14:12:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2021-02-23 14:12:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2021-02-23 14:12:46,145 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2021-02-23 14:12:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:46,146 INFO L480 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2021-02-23 14:12:46,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2021-02-23 14:12:46,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-23 14:12:46,155 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:46,155 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] [2021-02-23 14:12:46,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 14:12:46,156 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:46,156 INFO L82 PathProgramCache]: Analyzing trace with hash 815654601, now seen corresponding path program 1 times [2021-02-23 14:12:46,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:46,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147306000] [2021-02-23 14:12:46,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:46,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:46,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:46,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:46,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:12:46,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:46,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:47,600 WARN L202 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:47,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:47,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:47,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:12:47,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147306000] [2021-02-23 14:12:47,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:47,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:47,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628414446] [2021-02-23 14:12:47,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:47,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:47,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:47,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:47,819 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2021-02-23 14:12:49,177 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:54,653 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2021-02-23 14:12:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:54,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2021-02-23 14:12:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:54,676 INFO L225 Difference]: With dead ends: 4867 [2021-02-23 14:12:54,677 INFO L226 Difference]: Without dead ends: 4201 [2021-02-23 14:12:54,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-02-23 14:12:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2021-02-23 14:12:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2021-02-23 14:12:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2021-02-23 14:12:54,834 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2021-02-23 14:12:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:54,835 INFO L480 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2021-02-23 14:12:54,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2021-02-23 14:12:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-23 14:12:54,845 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:54,846 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] [2021-02-23 14:12:54,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 14:12:54,848 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash -329175222, now seen corresponding path program 1 times [2021-02-23 14:12:54,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:54,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535462128] [2021-02-23 14:12:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:55,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:55,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:55,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:55,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:12:55,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:55,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:12:55,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:55,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:56,778 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:56,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:56,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:56,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:12:56,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535462128] [2021-02-23 14:12:56,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:56,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:12:56,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675642171] [2021-02-23 14:12:56,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:12:56,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:56,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:12:56,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:56,954 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2021-02-23 14:13:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:05,863 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2021-02-23 14:13:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:13:05,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2021-02-23 14:13:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:05,903 INFO L225 Difference]: With dead ends: 12414 [2021-02-23 14:13:05,904 INFO L226 Difference]: Without dead ends: 8230 [2021-02-23 14:13:05,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:13:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-02-23 14:13:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2021-02-23 14:13:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2021-02-23 14:13:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2021-02-23 14:13:06,214 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2021-02-23 14:13:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:06,215 INFO L480 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2021-02-23 14:13:06,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:13:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2021-02-23 14:13:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-23 14:13:06,235 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:06,235 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] [2021-02-23 14:13:06,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 14:13:06,236 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash -185859987, now seen corresponding path program 1 times [2021-02-23 14:13:06,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:06,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806221622] [2021-02-23 14:13:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:06,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:06,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:06,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:06,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:13:06,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:06,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:07,630 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:07,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:07,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:07,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:13:07,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806221622] [2021-02-23 14:13:07,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:07,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:07,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750482479] [2021-02-23 14:13:07,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:07,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:07,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:07,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:07,765 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2021-02-23 14:13:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:18,675 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2021-02-23 14:13:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:18,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2021-02-23 14:13:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:18,740 INFO L225 Difference]: With dead ends: 24233 [2021-02-23 14:13:18,740 INFO L226 Difference]: Without dead ends: 16134 [2021-02-23 14:13:18,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2021-02-23 14:13:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2021-02-23 14:13:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2021-02-23 14:13:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2021-02-23 14:13:19,284 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2021-02-23 14:13:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:19,284 INFO L480 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2021-02-23 14:13:19,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2021-02-23 14:13:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-23 14:13:19,313 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:19,313 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] [2021-02-23 14:13:19,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 14:13:19,314 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:19,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:19,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1065692110, now seen corresponding path program 1 times [2021-02-23 14:13:19,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:19,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547762136] [2021-02-23 14:13:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:19,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:19,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:19,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:19,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:13:19,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:19,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:20,795 WARN L202 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:20,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:20,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:20,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:13:20,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547762136] [2021-02-23 14:13:20,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:20,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:20,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426780341] [2021-02-23 14:13:20,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:20,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:20,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:20,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:20,893 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states. [2021-02-23 14:13:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:32,112 INFO L93 Difference]: Finished difference Result 48321 states and 74099 transitions. [2021-02-23 14:13:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:32,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2021-02-23 14:13:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:32,184 INFO L225 Difference]: With dead ends: 48321 [2021-02-23 14:13:32,184 INFO L226 Difference]: Without dead ends: 32231 [2021-02-23 14:13:32,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32231 states. [2021-02-23 14:13:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151. [2021-02-23 14:13:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16151 states. [2021-02-23 14:13:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions. [2021-02-23 14:13:32,956 INFO L78 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332 [2021-02-23 14:13:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:32,956 INFO L480 AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions. [2021-02-23 14:13:32,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions. [2021-02-23 14:13:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-02-23 14:13:32,989 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:32,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:32,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 14:13:32,990 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:32,990 INFO L82 PathProgramCache]: Analyzing trace with hash 479440384, now seen corresponding path program 1 times [2021-02-23 14:13:32,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:32,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719646909] [2021-02-23 14:13:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:33,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:33,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:33,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:33,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:13:33,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:33,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:34,490 WARN L202 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:34,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:34,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:34,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:13:34,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719646909] [2021-02-23 14:13:34,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:34,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347166186] [2021-02-23 14:13:34,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:34,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:34,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:34,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:34,613 INFO L87 Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states. [2021-02-23 14:13:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:46,075 INFO L93 Difference]: Finished difference Result 48340 states and 74120 transitions. [2021-02-23 14:13:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:46,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2021-02-23 14:13:46,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:46,138 INFO L225 Difference]: With dead ends: 48340 [2021-02-23 14:13:46,139 INFO L226 Difference]: Without dead ends: 32249 [2021-02-23 14:13:46,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32249 states. [2021-02-23 14:13:47,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16169. [2021-02-23 14:13:47,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16169 states. [2021-02-23 14:13:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 24790 transitions. [2021-02-23 14:13:47,093 INFO L78 Accepts]: Start accepts. Automaton has 16169 states and 24790 transitions. Word has length 333 [2021-02-23 14:13:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:47,094 INFO L480 AbstractCegarLoop]: Abstraction has 16169 states and 24790 transitions. [2021-02-23 14:13:47,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 16169 states and 24790 transitions. [2021-02-23 14:13:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-02-23 14:13:47,119 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:47,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:47,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 14:13:47,119 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash 921881064, now seen corresponding path program 1 times [2021-02-23 14:13:47,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:47,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885153847] [2021-02-23 14:13:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:47,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:47,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:47,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:47,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:13:47,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:47,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:48,565 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:48,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:48,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:48,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:13:48,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885153847] [2021-02-23 14:13:48,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:48,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:48,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205563034] [2021-02-23 14:13:48,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:48,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:48,741 INFO L87 Difference]: Start difference. First operand 16169 states and 24790 transitions. Second operand 4 states. [2021-02-23 14:14:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:00,314 INFO L93 Difference]: Finished difference Result 45818 states and 70099 transitions. [2021-02-23 14:14:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:14:00,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2021-02-23 14:14:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:00,367 INFO L225 Difference]: With dead ends: 45818 [2021-02-23 14:14:00,367 INFO L226 Difference]: Without dead ends: 29894 [2021-02-23 14:14:00,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29894 states. [2021-02-23 14:14:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29894 to 29892. [2021-02-23 14:14:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29892 states. [2021-02-23 14:14:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29892 states to 29892 states and 45506 transitions. [2021-02-23 14:14:01,492 INFO L78 Accepts]: Start accepts. Automaton has 29892 states and 45506 transitions. Word has length 334 [2021-02-23 14:14:01,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:01,492 INFO L480 AbstractCegarLoop]: Abstraction has 29892 states and 45506 transitions. [2021-02-23 14:14:01,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29892 states and 45506 transitions. [2021-02-23 14:14:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-02-23 14:14:01,529 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:01,530 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, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:14:01,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 14:14:01,530 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:01,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:01,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1176559867, now seen corresponding path program 1 times [2021-02-23 14:14:01,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:01,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215948519] [2021-02-23 14:14:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:01,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:01,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:01,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:01,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:01,927 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 14:14:01,928 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 14:14:01,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:01,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:01,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:01,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:03,425 WARN L202 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:14:03,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:03,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:03,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:03,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215948519] [2021-02-23 14:14:03,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:03,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:14:03,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695204800] [2021-02-23 14:14:03,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:14:03,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:03,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:14:03,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:03,606 INFO L87 Difference]: Start difference. First operand 29892 states and 45506 transitions. Second operand 6 states. [2021-02-23 14:14:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:13,815 INFO L93 Difference]: Finished difference Result 88196 states and 134051 transitions. [2021-02-23 14:14:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:13,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2021-02-23 14:14:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:13,890 INFO L225 Difference]: With dead ends: 88196 [2021-02-23 14:14:13,890 INFO L226 Difference]: Without dead ends: 58363 [2021-02-23 14:14:13,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58363 states. [2021-02-23 14:14:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58363 to 58361. [2021-02-23 14:14:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58361 states. [2021-02-23 14:14:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58361 states to 58361 states and 88199 transitions. [2021-02-23 14:14:16,589 INFO L78 Accepts]: Start accepts. Automaton has 58361 states and 88199 transitions. Word has length 334 [2021-02-23 14:14:16,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:16,589 INFO L480 AbstractCegarLoop]: Abstraction has 58361 states and 88199 transitions. [2021-02-23 14:14:16,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:14:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 58361 states and 88199 transitions. [2021-02-23 14:14:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-02-23 14:14:16,631 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:16,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:14:16,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 14:14:16,632 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1242603829, now seen corresponding path program 1 times [2021-02-23 14:14:16,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:16,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714923047] [2021-02-23 14:14:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:16,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:16,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:16,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:16,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:16,961 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 14:14:16,963 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 14:14:16,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:16,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:17,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:17,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:18,388 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:14:18,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:18,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:18,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:18,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714923047] [2021-02-23 14:14:18,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:18,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:14:18,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881090685] [2021-02-23 14:14:18,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:14:18,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:14:18,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:18,567 INFO L87 Difference]: Start difference. First operand 58361 states and 88199 transitions. Second operand 6 states. [2021-02-23 14:14:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:31,228 INFO L93 Difference]: Finished difference Result 172280 states and 259890 transitions. [2021-02-23 14:14:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:31,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 336 [2021-02-23 14:14:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:31,368 INFO L225 Difference]: With dead ends: 172280 [2021-02-23 14:14:31,368 INFO L226 Difference]: Without dead ends: 114040 [2021-02-23 14:14:31,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114040 states. [2021-02-23 14:14:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114040 to 114038. [2021-02-23 14:14:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114038 states. [2021-02-23 14:14:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114038 states to 114038 states and 171024 transitions. [2021-02-23 14:14:36,709 INFO L78 Accepts]: Start accepts. Automaton has 114038 states and 171024 transitions. Word has length 336 [2021-02-23 14:14:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:36,710 INFO L480 AbstractCegarLoop]: Abstraction has 114038 states and 171024 transitions. [2021-02-23 14:14:36,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:14:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 114038 states and 171024 transitions. [2021-02-23 14:14:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-02-23 14:14:36,826 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:36,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:14:36,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 14:14:36,826 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash -65268679, now seen corresponding path program 1 times [2021-02-23 14:14:36,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:36,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585237458] [2021-02-23 14:14:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:37,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:37,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:37,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:37,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:37,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:37,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:37,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:37,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:38,762 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:14:38,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:38,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:38,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:38,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585237458] [2021-02-23 14:14:38,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:38,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:14:38,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40889532] [2021-02-23 14:14:38,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:14:38,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:38,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:14:38,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:14:38,969 INFO L87 Difference]: Start difference. First operand 114038 states and 171024 transitions. Second operand 5 states. [2021-02-23 14:14:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:55,954 INFO L93 Difference]: Finished difference Result 337032 states and 504605 transitions. [2021-02-23 14:14:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:55,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2021-02-23 14:14:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:56,291 INFO L225 Difference]: With dead ends: 337032 [2021-02-23 14:14:56,291 INFO L226 Difference]: Without dead ends: 223228 [2021-02-23 14:14:56,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223228 states. [2021-02-23 14:15:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223228 to 223226. [2021-02-23 14:15:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223226 states. [2021-02-23 14:15:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223226 states to 223226 states and 332316 transitions. [2021-02-23 14:15:07,275 INFO L78 Accepts]: Start accepts. Automaton has 223226 states and 332316 transitions. Word has length 336 [2021-02-23 14:15:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:07,275 INFO L480 AbstractCegarLoop]: Abstraction has 223226 states and 332316 transitions. [2021-02-23 14:15:07,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:15:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 223226 states and 332316 transitions. [2021-02-23 14:15:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-02-23 14:15:07,432 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:15:07,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:15:07,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 14:15:07,432 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:15:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:15:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash 778881619, now seen corresponding path program 1 times [2021-02-23 14:15:07,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:15:07,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259472381] [2021-02-23 14:15:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:15:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:07,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:07,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:07,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:07,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:15:07,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:07,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:09,206 WARN L202 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:15:09,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:15:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:09,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:09,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:15:09,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259472381] [2021-02-23 14:15:09,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:15:09,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:15:09,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787685385] [2021-02-23 14:15:09,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:15:09,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:15:09,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:15:09,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:15:09,472 INFO L87 Difference]: Start difference. First operand 223226 states and 332316 transitions. Second operand 4 states. [2021-02-23 14:15:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:15:37,148 INFO L93 Difference]: Finished difference Result 658958 states and 979028 transitions. [2021-02-23 14:15:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:15:37,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2021-02-23 14:15:37,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:15:37,870 INFO L225 Difference]: With dead ends: 658958 [2021-02-23 14:15:37,870 INFO L226 Difference]: Without dead ends: 437116 [2021-02-23 14:15:38,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:15:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437116 states. [2021-02-23 14:15:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437116 to 437114. [2021-02-23 14:15:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437114 states. [2021-02-23 14:15:59,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437114 states to 437114 states and 645850 transitions. [2021-02-23 14:15:59,750 INFO L78 Accepts]: Start accepts. Automaton has 437114 states and 645850 transitions. Word has length 338 [2021-02-23 14:15:59,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:59,751 INFO L480 AbstractCegarLoop]: Abstraction has 437114 states and 645850 transitions. [2021-02-23 14:15:59,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:15:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 437114 states and 645850 transitions. [2021-02-23 14:16:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-02-23 14:16:00,717 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:16:00,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:16:00,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 14:16:00,718 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:16:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:16:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1283254824, now seen corresponding path program 1 times [2021-02-23 14:16:00,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:16:00,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072200105] [2021-02-23 14:16:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:16:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:00,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:00,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:00,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:00,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:16:00,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:00,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:02,368 WARN L202 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:16:02,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:16:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:02,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:02,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:16:02,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072200105] [2021-02-23 14:16:02,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:16:02,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:16:02,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413390149] [2021-02-23 14:16:02,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:16:02,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:16:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:16:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:16:02,510 INFO L87 Difference]: Start difference. First operand 437114 states and 645850 transitions. Second operand 4 states.