/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 14:11:53,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 14:11:53,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 14:11:53,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 14:11:53,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 14:11:53,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 14:11:53,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 14:11:53,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 14:11:53,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 14:11:53,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 14:11:53,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 14:11:53,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 14:11:53,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 14:11:53,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 14:11:53,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 14:11:53,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 14:11:53,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 14:11:53,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 14:11:53,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 14:11:53,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 14:11:53,779 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 14:11:53,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 14:11:53,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 14:11:53,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 14:11:53,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 14:11:53,847 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 14:11:53,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 14:11:53,847 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 14:11:53,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 14:11:53,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 14:11:53,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 14:11:53,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 14:11:53,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 14:11:53,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 14:11:53,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 14:11:53,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 14:11:53,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 14:11:53,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 14:11:53,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 14:11:53,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 14:11:53,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 14:11:53,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:11:53,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 14:11:53,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 14:11:53,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 14:11:53,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 14:11:53,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 14:11:53,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 14:11:53,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 14:11:53,854 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 14:11:54,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 14:11:54,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 14:11:54,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 14:11:54,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 14:11:54,359 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 14:11:54,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:11:54,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4bf6c321/263e8ab6228947aca14f4fd75cbe17aa/FLAG5c74ddd68 [2021-02-23 14:11:55,338 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 14:11:55,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:11:55,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4bf6c321/263e8ab6228947aca14f4fd75cbe17aa/FLAG5c74ddd68 [2021-02-23 14:11:55,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4bf6c321/263e8ab6228947aca14f4fd75cbe17aa [2021-02-23 14:11:55,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 14:11:55,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 14:11:55,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 14:11:55,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 14:11:55,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 14:11:55,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:11:55" (1/1) ... [2021-02-23 14:11:55,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78361ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:55, skipping insertion in model container [2021-02-23 14:11:55,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:11:55" (1/1) ... [2021-02-23 14:11:55,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 14:11:55,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 14:11:56,704 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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34453,34466] [2021-02-23 14:11:57,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:11:57,091 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 14:11:57,458 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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[34453,34466] [2021-02-23 14:11:57,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:11:57,671 INFO L208 MainTranslator]: Completed translation [2021-02-23 14:11:57,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57 WrapperNode [2021-02-23 14:11:57,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 14:11:57,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 14:11:57,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 14:11:57,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 14:11:57,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (1/1) ... [2021-02-23 14:11:57,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (1/1) ... [2021-02-23 14:11:57,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (1/1) ... [2021-02-23 14:11:57,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (1/1) ... [2021-02-23 14:11:57,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (1/1) ... [2021-02-23 14:11:57,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (1/1) ... [2021-02-23 14:11:57,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (1/1) ... [2021-02-23 14:11:57,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 14:11:57,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 14:11:57,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 14:11:57,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 14:11:57,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (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 14:11:58,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 14:11:58,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 14:11:58,048 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 14:11:58,048 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 14:11:58,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 14:11:58,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 14:11:58,048 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 14:11:58,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 14:11:58,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 14:11:58,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 14:11:58,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-23 14:11:58,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 14:11:58,050 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-23 14:11:58,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 14:11:58,050 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-23 14:11:58,050 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-23 14:11:58,050 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-23 14:11:58,050 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-23 14:11:58,051 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-23 14:11:58,051 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-23 14:11:58,051 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 14:11:58,051 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 14:11:58,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 14:11:58,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 14:11:58,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 14:11:58,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 14:11:58,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 14:11:58,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 14:11:58,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 14:12:01,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 14:12:01,219 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 14:12:01,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:12:01 BoogieIcfgContainer [2021-02-23 14:12:01,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 14:12:01,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 14:12:01,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 14:12:01,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 14:12:01,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:11:55" (1/3) ... [2021-02-23 14:12:01,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7747bfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:12:01, skipping insertion in model container [2021-02-23 14:12:01,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:57" (2/3) ... [2021-02-23 14:12:01,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7747bfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:12:01, skipping insertion in model container [2021-02-23 14:12:01,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:12:01" (3/3) ... [2021-02-23 14:12:01,241 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:12:01,249 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 14:12:01,255 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 14:12:01,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 14:12:01,315 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 14:12:01,315 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 14:12:01,315 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 14:12:01,315 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 14:12:01,316 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 14:12:01,316 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 14:12:01,316 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 14:12:01,316 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 14:12:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2021-02-23 14:12:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-02-23 14:12:01,407 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:01,408 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] [2021-02-23 14:12:01,409 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:01,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:01,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1422302658, now seen corresponding path program 1 times [2021-02-23 14:12:01,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:01,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849587550] [2021-02-23 14:12:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:02,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:02,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:02,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:02,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:12:02,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:02,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:03,308 WARN L202 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:03,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:03,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:03,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:03,575 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 14:12:03,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849587550] [2021-02-23 14:12:03,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:03,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:03,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117289841] [2021-02-23 14:12:03,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:03,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:03,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:03,614 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 4 states. [2021-02-23 14:12:04,415 WARN L202 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:10,196 INFO L93 Difference]: Finished difference Result 1515 states and 2659 transitions. [2021-02-23 14:12:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:10,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2021-02-23 14:12:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:10,235 INFO L225 Difference]: With dead ends: 1515 [2021-02-23 14:12:10,235 INFO L226 Difference]: Without dead ends: 1299 [2021-02-23 14:12:10,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-02-23 14:12:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297. [2021-02-23 14:12:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1297 states. [2021-02-23 14:12:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions. [2021-02-23 14:12:10,465 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318 [2021-02-23 14:12:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:10,472 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions. [2021-02-23 14:12:10,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions. [2021-02-23 14:12:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-02-23 14:12:10,485 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:10,486 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] [2021-02-23 14:12:10,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 14:12:10,487 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash -633142820, now seen corresponding path program 1 times [2021-02-23 14:12:10,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:10,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331845781] [2021-02-23 14:12:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:10,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:10,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:10,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:10,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:12:10,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:10,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:11,757 WARN L202 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:11,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:11,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:11,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:11,979 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 14:12:11,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331845781] [2021-02-23 14:12:11,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:11,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:11,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370330872] [2021-02-23 14:12:11,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:11,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:11,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:11,986 INFO L87 Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states. [2021-02-23 14:12:12,720 WARN L202 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:17,685 INFO L93 Difference]: Finished difference Result 2671 states and 4201 transitions. [2021-02-23 14:12:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:17,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2021-02-23 14:12:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:17,703 INFO L225 Difference]: With dead ends: 2671 [2021-02-23 14:12:17,704 INFO L226 Difference]: Without dead ends: 2289 [2021-02-23 14:12:17,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-02-23 14:12:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2021-02-23 14:12:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2287 states. [2021-02-23 14:12:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions. [2021-02-23 14:12:17,811 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318 [2021-02-23 14:12:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:17,811 INFO L480 AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions. [2021-02-23 14:12:17,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions. [2021-02-23 14:12:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-02-23 14:12:17,821 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:17,821 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] [2021-02-23 14:12:17,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 14:12:17,822 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 497002931, now seen corresponding path program 1 times [2021-02-23 14:12:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:17,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391866159] [2021-02-23 14:12:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:18,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:18,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:18,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:18,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:12:18,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:18,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:18,698 WARN L202 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:18,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:18,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:18,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:18,901 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 14:12:18,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391866159] [2021-02-23 14:12:18,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:18,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:18,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321884937] [2021-02-23 14:12:18,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:18,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:18,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:18,905 INFO L87 Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states. [2021-02-23 14:12:19,590 WARN L202 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:24,504 INFO L93 Difference]: Finished difference Result 4943 states and 7762 transitions. [2021-02-23 14:12:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:24,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2021-02-23 14:12:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:24,529 INFO L225 Difference]: With dead ends: 4943 [2021-02-23 14:12:24,529 INFO L226 Difference]: Without dead ends: 4229 [2021-02-23 14:12:24,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2021-02-23 14:12:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227. [2021-02-23 14:12:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2021-02-23 14:12:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions. [2021-02-23 14:12:24,704 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318 [2021-02-23 14:12:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:24,705 INFO L480 AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions. [2021-02-23 14:12:24,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions. [2021-02-23 14:12:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-02-23 14:12:24,717 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:24,718 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] [2021-02-23 14:12:24,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 14:12:24,720 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:24,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:24,721 INFO L82 PathProgramCache]: Analyzing trace with hash -86215897, now seen corresponding path program 1 times [2021-02-23 14:12:24,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:24,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047657623] [2021-02-23 14:12:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:24,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:24,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:25,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:25,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:12:25,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:25,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:25,719 WARN L202 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:25,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:25,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:25,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:25,861 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 14:12:25,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047657623] [2021-02-23 14:12:25,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:25,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:25,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588277257] [2021-02-23 14:12:25,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:25,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:25,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:25,864 INFO L87 Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states. [2021-02-23 14:12:26,657 WARN L202 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2021-02-23 14:12:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:31,452 INFO L93 Difference]: Finished difference Result 9359 states and 14670 transitions. [2021-02-23 14:12:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:31,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2021-02-23 14:12:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:31,494 INFO L225 Difference]: With dead ends: 9359 [2021-02-23 14:12:31,494 INFO L226 Difference]: Without dead ends: 8029 [2021-02-23 14:12:31,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2021-02-23 14:12:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027. [2021-02-23 14:12:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8027 states. [2021-02-23 14:12:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions. [2021-02-23 14:12:31,821 INFO L78 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318 [2021-02-23 14:12:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:31,822 INFO L480 AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions. [2021-02-23 14:12:31,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions. [2021-02-23 14:12:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-02-23 14:12:31,842 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:31,842 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] [2021-02-23 14:12:31,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 14:12:31,843 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1231045720, now seen corresponding path program 1 times [2021-02-23 14:12:31,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:31,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259484697] [2021-02-23 14:12:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:32,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:32,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:32,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:32,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:12:32,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:32,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:12:32,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:32,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:33,156 WARN L202 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:33,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:33,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:33,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:33,329 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 14:12:33,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259484697] [2021-02-23 14:12:33,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:33,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:12:33,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100696294] [2021-02-23 14:12:33,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:12:33,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:33,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:12:33,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:33,332 INFO L87 Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states. [2021-02-23 14:12:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:41,676 INFO L93 Difference]: Finished difference Result 23754 states and 36777 transitions. [2021-02-23 14:12:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:41,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 318 [2021-02-23 14:12:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:41,743 INFO L225 Difference]: With dead ends: 23754 [2021-02-23 14:12:41,743 INFO L226 Difference]: Without dead ends: 15742 [2021-02-23 14:12:41,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:12:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15742 states. [2021-02-23 14:12:42,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740. [2021-02-23 14:12:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15740 states. [2021-02-23 14:12:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions. [2021-02-23 14:12:42,367 INFO L78 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318 [2021-02-23 14:12:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:42,368 INFO L480 AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions. [2021-02-23 14:12:42,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:12:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions. [2021-02-23 14:12:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-02-23 14:12:42,401 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:42,401 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] [2021-02-23 14:12:42,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 14:12:42,402 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:42,402 INFO L82 PathProgramCache]: Analyzing trace with hash 557747579, now seen corresponding path program 1 times [2021-02-23 14:12:42,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:42,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2498408] [2021-02-23 14:12:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:42,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:42,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:42,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:42,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:12:42,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:42,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:43,249 WARN L202 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:43,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:43,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:43,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:43,530 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 14:12:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2498408] [2021-02-23 14:12:43,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:43,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:43,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150394859] [2021-02-23 14:12:43,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:43,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:43,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:43,533 INFO L87 Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states. [2021-02-23 14:12:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:53,458 INFO L93 Difference]: Finished difference Result 46481 states and 71518 transitions. [2021-02-23 14:12:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:12:53,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2021-02-23 14:12:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:53,545 INFO L225 Difference]: With dead ends: 46481 [2021-02-23 14:12:53,545 INFO L226 Difference]: Without dead ends: 30870 [2021-02-23 14:12:53,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30870 states. [2021-02-23 14:12:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868. [2021-02-23 14:12:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30868 states. [2021-02-23 14:12:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions. [2021-02-23 14:12:55,016 INFO L78 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320 [2021-02-23 14:12:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:55,017 INFO L480 AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions. [2021-02-23 14:12:55,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions. [2021-02-23 14:12:55,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-02-23 14:12:55,083 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:55,083 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] [2021-02-23 14:12:55,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 14:12:55,084 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash 432087232, now seen corresponding path program 1 times [2021-02-23 14:12:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:55,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590261033] [2021-02-23 14:12:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:55,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:55,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:55,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:55,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:12:55,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:55,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:56,067 WARN L202 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:12:56,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:56,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:56,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:12:56,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590261033] [2021-02-23 14:12:56,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:56,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:56,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457802918] [2021-02-23 14:12:56,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:56,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:56,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:56,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:56,189 INFO L87 Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states. [2021-02-23 14:13:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:07,166 INFO L93 Difference]: Finished difference Result 92529 states and 141731 transitions. [2021-02-23 14:13:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:07,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 320 [2021-02-23 14:13:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:07,383 INFO L225 Difference]: With dead ends: 92529 [2021-02-23 14:13:07,383 INFO L226 Difference]: Without dead ends: 61703 [2021-02-23 14:13:07,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61703 states. [2021-02-23 14:13:08,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61703 to 30887. [2021-02-23 14:13:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30887 states. [2021-02-23 14:13:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30887 states to 30887 states and 47313 transitions. [2021-02-23 14:13:08,855 INFO L78 Accepts]: Start accepts. Automaton has 30887 states and 47313 transitions. Word has length 320 [2021-02-23 14:13:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:08,855 INFO L480 AbstractCegarLoop]: Abstraction has 30887 states and 47313 transitions. [2021-02-23 14:13:08,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30887 states and 47313 transitions. [2021-02-23 14:13:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-02-23 14:13:08,908 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:08,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:08,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 14:13:08,909 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:08,910 INFO L82 PathProgramCache]: Analyzing trace with hash -208470786, now seen corresponding path program 1 times [2021-02-23 14:13:08,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:08,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978656569] [2021-02-23 14:13:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:09,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:09,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:09,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:09,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:13:09,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:09,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:09,901 WARN L202 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:09,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:09,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:09,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:10,046 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 14:13:10,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978656569] [2021-02-23 14:13:10,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:10,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:10,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142593943] [2021-02-23 14:13:10,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:10,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:10,049 INFO L87 Difference]: Start difference. First operand 30887 states and 47313 transitions. Second operand 4 states. [2021-02-23 14:13:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:21,471 INFO L93 Difference]: Finished difference Result 92548 states and 141752 transitions. [2021-02-23 14:13:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:21,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2021-02-23 14:13:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:21,727 INFO L225 Difference]: With dead ends: 92548 [2021-02-23 14:13:21,727 INFO L226 Difference]: Without dead ends: 61721 [2021-02-23 14:13:21,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2021-02-23 14:13:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 30905. [2021-02-23 14:13:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30905 states. [2021-02-23 14:13:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30905 states to 30905 states and 47334 transitions. [2021-02-23 14:13:23,355 INFO L78 Accepts]: Start accepts. Automaton has 30905 states and 47334 transitions. Word has length 321 [2021-02-23 14:13:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:23,355 INFO L480 AbstractCegarLoop]: Abstraction has 30905 states and 47334 transitions. [2021-02-23 14:13:23,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30905 states and 47334 transitions. [2021-02-23 14:13:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-02-23 14:13:23,376 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:23,377 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] [2021-02-23 14:13:23,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 14:13:23,377 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash 592127350, now seen corresponding path program 1 times [2021-02-23 14:13:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:23,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148488363] [2021-02-23 14:13:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:23,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:23,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:23,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:23,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:13:23,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:23,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:24,184 WARN L202 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:24,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:24,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:24,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:24,679 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 14:13:24,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148488363] [2021-02-23 14:13:24,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:24,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:24,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528181156] [2021-02-23 14:13:24,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:24,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:24,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:24,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:24,683 INFO L87 Difference]: Start difference. First operand 30905 states and 47334 transitions. Second operand 4 states. [2021-02-23 14:13:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:36,061 INFO L93 Difference]: Finished difference Result 87746 states and 134159 transitions. [2021-02-23 14:13:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:36,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2021-02-23 14:13:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:36,139 INFO L225 Difference]: With dead ends: 87746 [2021-02-23 14:13:36,140 INFO L226 Difference]: Without dead ends: 57086 [2021-02-23 14:13:36,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57086 states. [2021-02-23 14:13:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57086 to 57084. [2021-02-23 14:13:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57084 states. [2021-02-23 14:13:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57084 states to 57084 states and 86830 transitions. [2021-02-23 14:13:38,236 INFO L78 Accepts]: Start accepts. Automaton has 57084 states and 86830 transitions. Word has length 322 [2021-02-23 14:13:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:38,237 INFO L480 AbstractCegarLoop]: Abstraction has 57084 states and 86830 transitions. [2021-02-23 14:13:38,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 57084 states and 86830 transitions. [2021-02-23 14:13:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-02-23 14:13:38,283 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:38,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:38,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 14:13:38,284 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1830845971, now seen corresponding path program 1 times [2021-02-23 14:13:38,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:38,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150761377] [2021-02-23 14:13:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:38,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:38,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:38,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:38,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:13:38,650 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 14:13:38,651 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 14:13:38,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:38,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:13:38,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:38,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:39,347 WARN L202 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:39,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:39,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:39,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:39,639 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 14:13:39,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150761377] [2021-02-23 14:13:39,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:39,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:13:39,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098099219] [2021-02-23 14:13:39,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:13:39,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:39,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:13:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:13:39,643 INFO L87 Difference]: Start difference. First operand 57084 states and 86830 transitions. Second operand 6 states. [2021-02-23 14:13:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:51,189 INFO L93 Difference]: Finished difference Result 168632 states and 256103 transitions. [2021-02-23 14:13:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:13:51,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 322 [2021-02-23 14:13:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:51,372 INFO L225 Difference]: With dead ends: 168632 [2021-02-23 14:13:51,372 INFO L226 Difference]: Without dead ends: 111607 [2021-02-23 14:13:51,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:13:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111607 states. [2021-02-23 14:13:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111607 to 111605. [2021-02-23 14:13:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111605 states. [2021-02-23 14:13:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111605 states to 111605 states and 168567 transitions. [2021-02-23 14:13:56,435 INFO L78 Accepts]: Start accepts. Automaton has 111605 states and 168567 transitions. Word has length 322 [2021-02-23 14:13:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:56,435 INFO L480 AbstractCegarLoop]: Abstraction has 111605 states and 168567 transitions. [2021-02-23 14:13:56,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:13:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 111605 states and 168567 transitions. [2021-02-23 14:13:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-23 14:13:56,533 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:56,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:56,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 14:13:56,534 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:56,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:56,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1065058135, now seen corresponding path program 1 times [2021-02-23 14:13:56,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:56,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730346916] [2021-02-23 14:13:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:56,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:56,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:56,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:56,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:13:56,861 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 14:13:56,862 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 14:13:56,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:56,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:13:56,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:56,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:57,699 WARN L202 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:13:57,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:57,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:57,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:57,915 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 14:13:57,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730346916] [2021-02-23 14:13:57,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:57,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:13:57,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298351616] [2021-02-23 14:13:57,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:13:57,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:57,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:13:57,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:13:57,917 INFO L87 Difference]: Start difference. First operand 111605 states and 168567 transitions. Second operand 6 states. [2021-02-23 14:14:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:13,216 INFO L93 Difference]: Finished difference Result 329672 states and 497034 transitions. [2021-02-23 14:14:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:13,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 324 [2021-02-23 14:14:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:13,710 INFO L225 Difference]: With dead ends: 329672 [2021-02-23 14:14:13,710 INFO L226 Difference]: Without dead ends: 218188 [2021-02-23 14:14:13,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218188 states. [2021-02-23 14:14:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218188 to 218186. [2021-02-23 14:14:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218186 states. [2021-02-23 14:14:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218186 states to 218186 states and 327020 transitions. [2021-02-23 14:14:24,859 INFO L78 Accepts]: Start accepts. Automaton has 218186 states and 327020 transitions. Word has length 324 [2021-02-23 14:14:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:24,859 INFO L480 AbstractCegarLoop]: Abstraction has 218186 states and 327020 transitions. [2021-02-23 14:14:24,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:14:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 218186 states and 327020 transitions. [2021-02-23 14:14:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-23 14:14:25,025 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:25,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:14:25,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 14:14:25,026 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash -904578137, now seen corresponding path program 1 times [2021-02-23 14:14:25,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:25,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508674619] [2021-02-23 14:14:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:25,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:25,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:25,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:25,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:25,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:25,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:25,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:25,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:26,335 WARN L202 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2021-02-23 14:14:26,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:26,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:26,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:26,521 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 14:14:26,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508674619] [2021-02-23 14:14:26,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:26,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:14:26,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396375763] [2021-02-23 14:14:26,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:14:26,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:26,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:14:26,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:14:26,524 INFO L87 Difference]: Start difference. First operand 218186 states and 327020 transitions. Second operand 5 states. [2021-02-23 14:14:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:50,941 INFO L93 Difference]: Finished difference Result 645156 states and 965393 transitions. [2021-02-23 14:14:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:50,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2021-02-23 14:14:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:51,949 INFO L225 Difference]: With dead ends: 645156 [2021-02-23 14:14:51,950 INFO L226 Difference]: Without dead ends: 427204 [2021-02-23 14:14:52,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427204 states.