/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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 14:12:32,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 14:12:32,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 14:12:32,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 14:12:32,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 14:12:32,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 14:12:32,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 14:12:32,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 14:12:32,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 14:12:32,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 14:12:32,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 14:12:32,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 14:12:32,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 14:12:32,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 14:12:32,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 14:12:32,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 14:12:32,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 14:12:32,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 14:12:32,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 14:12:32,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 14:12:32,177 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 14:12:32,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 14:12:32,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 14:12:32,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 14:12:32,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 14:12:32,205 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 14:12:32,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 14:12:32,206 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 14:12:32,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 14:12:32,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 14:12:32,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 14:12:32,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 14:12:32,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 14:12:32,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 14:12:32,207 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 14:12:32,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 14:12:32,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 14:12:32,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 14:12:32,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 14:12:32,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 14:12:32,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 14:12:32,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:12:32,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 14:12:32,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 14:12:32,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 14:12:32,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 14:12:32,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 14:12:32,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 14:12:32,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 14:12:32,210 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 14:12:32,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 14:12:32,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 14:12:32,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 14:12:32,599 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 14:12:32,599 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 14:12:32,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:12:32,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04a6d39b3/2f67af1b7231424581f065285462b583/FLAG4c6491960 [2021-02-23 14:12:33,644 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 14:12:33,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:12:33,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04a6d39b3/2f67af1b7231424581f065285462b583/FLAG4c6491960 [2021-02-23 14:12:33,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04a6d39b3/2f67af1b7231424581f065285462b583 [2021-02-23 14:12:33,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 14:12:33,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 14:12:33,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 14:12:33,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 14:12:33,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 14:12:33,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:12:33" (1/1) ... [2021-02-23 14:12:33,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d6d042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:33, skipping insertion in model container [2021-02-23 14:12:33,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:12:33" (1/1) ... [2021-02-23 14:12:33,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 14:12:33,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 14:12:34,695 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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34132,34145] [2021-02-23 14:12:34,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:12:34,931 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 14:12:35,268 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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34132,34145] [2021-02-23 14:12:35,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:12:35,477 INFO L208 MainTranslator]: Completed translation [2021-02-23 14:12:35,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35 WrapperNode [2021-02-23 14:12:35,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 14:12:35,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 14:12:35,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 14:12:35,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 14:12:35,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (1/1) ... [2021-02-23 14:12:35,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (1/1) ... [2021-02-23 14:12:35,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (1/1) ... [2021-02-23 14:12:35,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (1/1) ... [2021-02-23 14:12:35,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (1/1) ... [2021-02-23 14:12:35,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (1/1) ... [2021-02-23 14:12:35,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (1/1) ... [2021-02-23 14:12:35,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 14:12:35,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 14:12:35,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 14:12:35,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 14:12:35,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (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 14:12:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 14:12:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 14:12:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 14:12:35,794 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 14:12:35,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 14:12:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 14:12:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 14:12:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 14:12:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 14:12:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 14:12:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-23 14:12:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 14:12:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-23 14:12:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 14:12:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-23 14:12:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-23 14:12:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-23 14:12:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-23 14:12:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-23 14:12:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-23 14:12:35,797 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 14:12:35,797 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 14:12:35,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 14:12:35,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 14:12:35,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 14:12:35,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 14:12:35,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 14:12:35,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 14:12:35,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 14:12:39,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 14:12:39,617 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 14:12:39,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:12:39 BoogieIcfgContainer [2021-02-23 14:12:39,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 14:12:39,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 14:12:39,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 14:12:39,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 14:12:39,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:12:33" (1/3) ... [2021-02-23 14:12:39,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce00afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:12:39, skipping insertion in model container [2021-02-23 14:12:39,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:12:35" (2/3) ... [2021-02-23 14:12:39,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce00afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:12:39, skipping insertion in model container [2021-02-23 14:12:39,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:12:39" (3/3) ... [2021-02-23 14:12:39,630 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:12:39,637 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 14:12:39,643 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 14:12:39,663 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 14:12:39,699 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 14:12:39,699 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 14:12:39,699 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 14:12:39,699 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 14:12:39,700 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 14:12:39,700 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 14:12:39,700 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 14:12:39,700 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 14:12:39,735 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2021-02-23 14:12:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-23 14:12:39,777 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:39,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:12:39,779 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:39,786 INFO L82 PathProgramCache]: Analyzing trace with hash -796953542, now seen corresponding path program 1 times [2021-02-23 14:12:39,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:39,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788362844] [2021-02-23 14:12:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:40,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:40,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:40,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:40,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:12:40,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:40,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:42,017 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:42,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:42,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:42,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:42,337 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 14:12:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788362844] [2021-02-23 14:12:42,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:42,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:42,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129769845] [2021-02-23 14:12:42,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:42,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:42,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:42,372 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2021-02-23 14:12:43,820 WARN L202 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:50,194 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2021-02-23 14:12:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:50,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-23 14:12:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:50,226 INFO L225 Difference]: With dead ends: 1489 [2021-02-23 14:12:50,226 INFO L226 Difference]: Without dead ends: 1273 [2021-02-23 14:12:50,232 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 14:12:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-02-23 14:12:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2021-02-23 14:12:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2021-02-23 14:12:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2021-02-23 14:12:50,375 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2021-02-23 14:12:50,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:50,377 INFO L480 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2021-02-23 14:12:50,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2021-02-23 14:12:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-23 14:12:50,388 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:50,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:12:50,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 14:12:50,389 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash -7793704, now seen corresponding path program 1 times [2021-02-23 14:12:50,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:50,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980138200] [2021-02-23 14:12:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:50,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:50,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:50,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:50,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:12:50,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:50,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:52,112 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:52,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:52,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:52,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:52,350 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 14:12:52,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980138200] [2021-02-23 14:12:52,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:52,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:52,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015455855] [2021-02-23 14:12:52,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:52,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:52,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:52,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:52,355 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 4 states. [2021-02-23 14:12:53,722 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:59,296 INFO L93 Difference]: Finished difference Result 2519 states and 3949 transitions. [2021-02-23 14:12:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:59,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-23 14:12:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:59,312 INFO L225 Difference]: With dead ends: 2519 [2021-02-23 14:12:59,312 INFO L226 Difference]: Without dead ends: 2185 [2021-02-23 14:12:59,316 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 14:12:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-02-23 14:12:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2183. [2021-02-23 14:12:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2183 states. [2021-02-23 14:12:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3388 transitions. [2021-02-23 14:12:59,419 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3388 transitions. Word has length 326 [2021-02-23 14:12:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:59,420 INFO L480 AbstractCegarLoop]: Abstraction has 2183 states and 3388 transitions. [2021-02-23 14:12:59,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3388 transitions. [2021-02-23 14:12:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-23 14:12:59,431 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:59,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:12:59,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 14:12:59,432 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:59,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1152623527, now seen corresponding path program 1 times [2021-02-23 14:12:59,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:59,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28952706] [2021-02-23 14:12:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:00,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:00,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:00,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:00,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:13:00,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:00,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:13:00,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:00,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:01,333 WARN L202 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:01,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:01,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:01,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:01,570 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 14:13:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28952706] [2021-02-23 14:13:01,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:01,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:13:01,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87463355] [2021-02-23 14:13:01,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:13:01,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:01,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:13:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:13:01,574 INFO L87 Difference]: Start difference. First operand 2183 states and 3388 transitions. Second operand 5 states. [2021-02-23 14:13:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:10,407 INFO L93 Difference]: Finished difference Result 6462 states and 10021 transitions. [2021-02-23 14:13:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:13:10,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2021-02-23 14:13:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:10,430 INFO L225 Difference]: With dead ends: 6462 [2021-02-23 14:13:10,431 INFO L226 Difference]: Without dead ends: 4294 [2021-02-23 14:13:10,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:13:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-02-23 14:13:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2021-02-23 14:13:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2021-02-23 14:13:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 6626 transitions. [2021-02-23 14:13:10,613 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 6626 transitions. Word has length 326 [2021-02-23 14:13:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:10,614 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 6626 transitions. [2021-02-23 14:13:10,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:13:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 6626 transitions. [2021-02-23 14:13:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-23 14:13:10,626 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:10,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:10,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 14:13:10,628 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1729084787, now seen corresponding path program 1 times [2021-02-23 14:13:10,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:10,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760138167] [2021-02-23 14:13:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:10,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:10,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:10,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:10,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:13:10,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:10,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:12,031 WARN L202 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:12,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:12,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:12,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:12,149 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 14:13:12,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760138167] [2021-02-23 14:13:12,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:12,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:12,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26918784] [2021-02-23 14:13:12,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:12,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:12,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:12,152 INFO L87 Difference]: Start difference. First operand 4292 states and 6626 transitions. Second operand 4 states. [2021-02-23 14:13:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:22,899 INFO L93 Difference]: Finished difference Result 12831 states and 19807 transitions. [2021-02-23 14:13:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:22,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-23 14:13:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:22,939 INFO L225 Difference]: With dead ends: 12831 [2021-02-23 14:13:22,939 INFO L226 Difference]: Without dead ends: 8564 [2021-02-23 14:13:22,948 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 14:13:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8564 states. [2021-02-23 14:13:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8564 to 4305. [2021-02-23 14:13:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4305 states. [2021-02-23 14:13:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 6645 transitions. [2021-02-23 14:13:23,180 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 6645 transitions. Word has length 328 [2021-02-23 14:13:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:23,180 INFO L480 AbstractCegarLoop]: Abstraction has 4305 states and 6645 transitions. [2021-02-23 14:13:23,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 6645 transitions. [2021-02-23 14:13:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-23 14:13:23,190 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:23,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:23,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 14:13:23,191 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 4113480, now seen corresponding path program 1 times [2021-02-23 14:13:23,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:23,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379613189] [2021-02-23 14:13:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:23,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:23,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:23,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:23,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:13:23,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:23,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:24,687 WARN L202 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:24,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:24,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:24,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:24,839 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 14:13:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379613189] [2021-02-23 14:13:24,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:24,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:24,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730232389] [2021-02-23 14:13:24,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:24,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:24,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:24,842 INFO L87 Difference]: Start difference. First operand 4305 states and 6645 transitions. Second operand 4 states. [2021-02-23 14:13:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:35,581 INFO L93 Difference]: Finished difference Result 12594 states and 19394 transitions. [2021-02-23 14:13:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:35,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-23 14:13:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:35,624 INFO L225 Difference]: With dead ends: 12594 [2021-02-23 14:13:35,624 INFO L226 Difference]: Without dead ends: 8431 [2021-02-23 14:13:35,634 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 14:13:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2021-02-23 14:13:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 8429. [2021-02-23 14:13:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8429 states. [2021-02-23 14:13:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 12935 transitions. [2021-02-23 14:13:36,068 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 12935 transitions. Word has length 328 [2021-02-23 14:13:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:36,069 INFO L480 AbstractCegarLoop]: Abstraction has 8429 states and 12935 transitions. [2021-02-23 14:13:36,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 12935 transitions. [2021-02-23 14:13:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-02-23 14:13:36,084 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:36,084 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] [2021-02-23 14:13:36,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 14:13:36,085 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash -649310729, now seen corresponding path program 1 times [2021-02-23 14:13:36,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:36,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015143280] [2021-02-23 14:13:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:36,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:36,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:36,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:36,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:13:36,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:36,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:37,413 WARN L202 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:37,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:37,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:37,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:37,622 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 14:13:37,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015143280] [2021-02-23 14:13:37,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:37,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:37,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291682412] [2021-02-23 14:13:37,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:37,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:37,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:37,625 INFO L87 Difference]: Start difference. First operand 8429 states and 12935 transitions. Second operand 4 states. [2021-02-23 14:13:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:48,658 INFO L93 Difference]: Finished difference Result 25174 states and 38618 transitions. [2021-02-23 14:13:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:48,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2021-02-23 14:13:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:48,694 INFO L225 Difference]: With dead ends: 25174 [2021-02-23 14:13:48,694 INFO L226 Difference]: Without dead ends: 16805 [2021-02-23 14:13:48,713 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 14:13:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2021-02-23 14:13:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 8447. [2021-02-23 14:13:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8447 states. [2021-02-23 14:13:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 12956 transitions. [2021-02-23 14:13:49,164 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 12956 transitions. Word has length 329 [2021-02-23 14:13:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:49,164 INFO L480 AbstractCegarLoop]: Abstraction has 8447 states and 12956 transitions. [2021-02-23 14:13:49,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 12956 transitions. [2021-02-23 14:13:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-23 14:13:49,179 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:49,180 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 14:13:49,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 14:13:49,180 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash -448342333, now seen corresponding path program 1 times [2021-02-23 14:13:49,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:49,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223290184] [2021-02-23 14:13:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:49,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:49,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:49,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:49,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:13:49,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:49,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:50,608 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:50,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:50,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:50,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:50,746 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 14:13:50,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223290184] [2021-02-23 14:13:50,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:50,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555378881] [2021-02-23 14:13:50,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:50,748 INFO L87 Difference]: Start difference. First operand 8447 states and 12956 transitions. Second operand 4 states. [2021-02-23 14:14:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:01,860 INFO L93 Difference]: Finished difference Result 24662 states and 37725 transitions. [2021-02-23 14:14:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:14:01,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2021-02-23 14:14:01,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:01,898 INFO L225 Difference]: With dead ends: 24662 [2021-02-23 14:14:01,898 INFO L226 Difference]: Without dead ends: 16460 [2021-02-23 14:14:01,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16460 states. [2021-02-23 14:14:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16460 to 16458. [2021-02-23 14:14:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16458 states. [2021-02-23 14:14:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16458 states to 16458 states and 25068 transitions. [2021-02-23 14:14:02,879 INFO L78 Accepts]: Start accepts. Automaton has 16458 states and 25068 transitions. Word has length 330 [2021-02-23 14:14:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:02,879 INFO L480 AbstractCegarLoop]: Abstraction has 16458 states and 25068 transitions. [2021-02-23 14:14:02,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 16458 states and 25068 transitions. [2021-02-23 14:14:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-23 14:14:02,909 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:02,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:14:02,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 14:14:02,910 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:02,911 INFO L82 PathProgramCache]: Analyzing trace with hash -29605280, now seen corresponding path program 1 times [2021-02-23 14:14:02,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:02,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418567659] [2021-02-23 14:14:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:03,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:03,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:03,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:03,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:03,327 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-23 14:14:03,329 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-23 14:14:03,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:03,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:03,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:03,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:04,717 WARN L202 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:14:04,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:04,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:04,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:04,907 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 14:14:04,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418567659] [2021-02-23 14:14:04,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:04,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:14:04,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121352480] [2021-02-23 14:14:04,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:14:04,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:04,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:14:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:04,911 INFO L87 Difference]: Start difference. First operand 16458 states and 25068 transitions. Second operand 6 states. [2021-02-23 14:14:14,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:14,628 INFO L93 Difference]: Finished difference Result 48572 states and 73861 transitions. [2021-02-23 14:14:14,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:14,628 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 330 [2021-02-23 14:14:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:14,689 INFO L225 Difference]: With dead ends: 48572 [2021-02-23 14:14:14,690 INFO L226 Difference]: Without dead ends: 32173 [2021-02-23 14:14:14,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32173 states. [2021-02-23 14:14:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32173 to 32171. [2021-02-23 14:14:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32171 states. [2021-02-23 14:14:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32171 states to 32171 states and 48661 transitions. [2021-02-23 14:14:16,052 INFO L78 Accepts]: Start accepts. Automaton has 32171 states and 48661 transitions. Word has length 330 [2021-02-23 14:14:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:16,053 INFO L480 AbstractCegarLoop]: Abstraction has 32171 states and 48661 transitions. [2021-02-23 14:14:16,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:14:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32171 states and 48661 transitions. [2021-02-23 14:14:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-23 14:14:16,109 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:16,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:14:16,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 14:14:16,110 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:16,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1987076995, now seen corresponding path program 1 times [2021-02-23 14:14:16,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:16,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457200075] [2021-02-23 14:14:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:16,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:16,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:16,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:16,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:14:16,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:16,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:17,617 WARN L202 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:14:17,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:17,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:17,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:17,763 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 14:14:17,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457200075] [2021-02-23 14:14:17,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:17,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:17,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683850339] [2021-02-23 14:14:17,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:17,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:17,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:17,765 INFO L87 Difference]: Start difference. First operand 32171 states and 48661 transitions. Second operand 4 states. [2021-02-23 14:14:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:30,755 INFO L93 Difference]: Finished difference Result 94573 states and 142734 transitions. [2021-02-23 14:14:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:14:30,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2021-02-23 14:14:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:30,877 INFO L225 Difference]: With dead ends: 94573 [2021-02-23 14:14:30,877 INFO L226 Difference]: Without dead ends: 62923 [2021-02-23 14:14:30,931 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 14:14:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62923 states. [2021-02-23 14:14:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62923 to 62921. [2021-02-23 14:14:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62921 states. [2021-02-23 14:14:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62921 states to 62921 states and 94494 transitions. [2021-02-23 14:14:34,063 INFO L78 Accepts]: Start accepts. Automaton has 62921 states and 94494 transitions. Word has length 332 [2021-02-23 14:14:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:34,063 INFO L480 AbstractCegarLoop]: Abstraction has 62921 states and 94494 transitions. [2021-02-23 14:14:34,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand 62921 states and 94494 transitions. [2021-02-23 14:14:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-23 14:14:34,109 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:34,109 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 14:14:34,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 14:14:34,110 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:34,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash -181056678, now seen corresponding path program 1 times [2021-02-23 14:14:34,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:34,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655856052] [2021-02-23 14:14:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:34,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:34,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:34,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:34,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:34,625 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 14:14:34,627 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 14:14:34,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:34,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:34,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:34,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:35,996 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:14:35,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:36,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:36,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:36,210 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 14:14:36,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655856052] [2021-02-23 14:14:36,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:36,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:14:36,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501660830] [2021-02-23 14:14:36,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:14:36,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:14:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:36,213 INFO L87 Difference]: Start difference. First operand 62921 states and 94494 transitions. Second operand 6 states. [2021-02-23 14:14:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:49,705 INFO L93 Difference]: Finished difference Result 186176 states and 279088 transitions. [2021-02-23 14:14:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:49,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 332 [2021-02-23 14:14:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:49,927 INFO L225 Difference]: With dead ends: 186176 [2021-02-23 14:14:49,927 INFO L226 Difference]: Without dead ends: 123410 [2021-02-23 14:14:50,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123410 states. [2021-02-23 14:14:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123410 to 123408. [2021-02-23 14:14:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123408 states. [2021-02-23 14:14:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123408 states to 123408 states and 183988 transitions. [2021-02-23 14:14:55,891 INFO L78 Accepts]: Start accepts. Automaton has 123408 states and 183988 transitions. Word has length 332 [2021-02-23 14:14:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:55,892 INFO L480 AbstractCegarLoop]: Abstraction has 123408 states and 183988 transitions. [2021-02-23 14:14:55,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:14:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 123408 states and 183988 transitions. [2021-02-23 14:14:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-23 14:14:56,324 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:56,324 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 14:14:56,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 14:14:56,325 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:56,325 INFO L82 PathProgramCache]: Analyzing trace with hash -989792084, now seen corresponding path program 1 times [2021-02-23 14:14:56,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:56,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306671096] [2021-02-23 14:14:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:56,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:56,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:56,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:56,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:56,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:56,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:56,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:56,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:58,039 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:14:58,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:58,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:58,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:58,178 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 14:14:58,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306671096] [2021-02-23 14:14:58,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:58,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:14:58,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086291827] [2021-02-23 14:14:58,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:14:58,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:58,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:14:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:14:58,181 INFO L87 Difference]: Start difference. First operand 123408 states and 183988 transitions. Second operand 5 states. [2021-02-23 14:15:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:15:17,373 INFO L93 Difference]: Finished difference Result 364427 states and 542281 transitions. [2021-02-23 14:15:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:15:17,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2021-02-23 14:15:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:15:18,000 INFO L225 Difference]: With dead ends: 364427 [2021-02-23 14:15:18,000 INFO L226 Difference]: Without dead ends: 241305 [2021-02-23 14:15:18,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:15:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241305 states. [2021-02-23 14:15:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241305 to 241303. [2021-02-23 14:15:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241303 states. [2021-02-23 14:15:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241303 states to 241303 states and 356836 transitions. [2021-02-23 14:15:30,321 INFO L78 Accepts]: Start accepts. Automaton has 241303 states and 356836 transitions. Word has length 332 [2021-02-23 14:15:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:30,321 INFO L480 AbstractCegarLoop]: Abstraction has 241303 states and 356836 transitions. [2021-02-23 14:15:30,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:15:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 241303 states and 356836 transitions. [2021-02-23 14:15:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-02-23 14:15:30,530 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:15:30,530 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 14:15:30,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 14:15:30,531 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:15:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:15:30,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1009981714, now seen corresponding path program 1 times [2021-02-23 14:15:30,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:15:30,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660399276] [2021-02-23 14:15:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:15:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:31,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:31,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:31,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:31,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:15:31,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:31,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:32,446 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:15:32,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:15:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:32,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:32,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:32,618 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 14:15:32,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660399276] [2021-02-23 14:15:32,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:15:32,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:15:32,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136270042] [2021-02-23 14:15:32,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:15:32,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:15:32,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:15:32,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:15:32,621 INFO L87 Difference]: Start difference. First operand 241303 states and 356836 transitions. Second operand 4 states. [2021-02-23 14:16:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:16:03,049 INFO L93 Difference]: Finished difference Result 710956 states and 1048776 transitions. [2021-02-23 14:16:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:16:03,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2021-02-23 14:16:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:16:04,061 INFO L225 Difference]: With dead ends: 710956 [2021-02-23 14:16:04,061 INFO L226 Difference]: Without dead ends: 472170 [2021-02-23 14:16:04,259 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 14:16:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472170 states. [2021-02-23 14:16:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472170 to 472168. [2021-02-23 14:16:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472168 states. [2021-02-23 14:16:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472168 states to 472168 states and 692502 transitions. [2021-02-23 14:16:29,286 INFO L78 Accepts]: Start accepts. Automaton has 472168 states and 692502 transitions. Word has length 334 [2021-02-23 14:16:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:16:29,287 INFO L480 AbstractCegarLoop]: Abstraction has 472168 states and 692502 transitions. [2021-02-23 14:16:29,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:16:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 472168 states and 692502 transitions. [2021-02-23 14:16:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-02-23 14:16:29,731 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:16:29,731 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 14:16:29,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 14:16:29,732 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:16:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:16:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash 509472535, now seen corresponding path program 1 times [2021-02-23 14:16:29,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:16:29,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201586159] [2021-02-23 14:16:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:16:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:29,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:29,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:29,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:29,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:16:29,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:29,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:31,568 WARN L202 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:16:31,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:16:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:31,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:31,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:31,690 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 14:16:31,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201586159] [2021-02-23 14:16:31,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:16:31,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:16:31,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723689884] [2021-02-23 14:16:31,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:16:31,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:16:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:16:31,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:16:31,693 INFO L87 Difference]: Start difference. First operand 472168 states and 692502 transitions. Second operand 4 states.