/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.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 14:16:17,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 14:16:17,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 14:16:17,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 14:16:17,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 14:16:17,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 14:16:17,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 14:16:17,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 14:16:17,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 14:16:17,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 14:16:17,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 14:16:17,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 14:16:17,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 14:16:17,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 14:16:17,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 14:16:17,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 14:16:17,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 14:16:17,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 14:16:17,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 14:16:17,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 14:16:17,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 14:16:17,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 14:16:17,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 14:16:17,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 14:16:17,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 14:16:17,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 14:16:17,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 14:16:17,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 14:16:17,938 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 14:16:17,992 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 14:16:17,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 14:16:17,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 14:16:17,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 14:16:17,997 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 14:16:17,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 14:16:17,997 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 14:16:17,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 14:16:17,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 14:16:17,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 14:16:17,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 14:16:18,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 14:16:18,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 14:16:18,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 14:16:18,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 14:16:18,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 14:16:18,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 14:16:18,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 14:16:18,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 14:16:18,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 14:16:18,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:16:18,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 14:16:18,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 14:16:18,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 14:16:18,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 14:16:18,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 14:16:18,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 14:16:18,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 14:16:18,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 14:16:18,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 14:16:18,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 14:16:18,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 14:16:18,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 14:16:18,445 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 14:16:18,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-23 14:16:18,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f08b79d9/a13dbaea275f4cea826d37bdeb24e2d3/FLAGb6ff7d959 [2021-02-23 14:16:19,450 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 14:16:19,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-23 14:16:19,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f08b79d9/a13dbaea275f4cea826d37bdeb24e2d3/FLAGb6ff7d959 [2021-02-23 14:16:19,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f08b79d9/a13dbaea275f4cea826d37bdeb24e2d3 [2021-02-23 14:16:19,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 14:16:19,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 14:16:19,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 14:16:19,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 14:16:19,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 14:16:19,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:16:19" (1/1) ... [2021-02-23 14:16:19,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37fbdf23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:19, skipping insertion in model container [2021-02-23 14:16:19,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:16:19" (1/1) ... [2021-02-23 14:16:19,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 14:16:19,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 14:16:20,935 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.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[54368,54381] [2021-02-23 14:16:21,053 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.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[60722,60735] [2021-02-23 14:16:21,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:16:21,455 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 14:16:22,142 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.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[54368,54381] [2021-02-23 14:16:22,259 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.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[60722,60735] [2021-02-23 14:16:22,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:16:22,648 INFO L208 MainTranslator]: Completed translation [2021-02-23 14:16:22,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22 WrapperNode [2021-02-23 14:16:22,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 14:16:22,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 14:16:22,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 14:16:22,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 14:16:22,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (1/1) ... [2021-02-23 14:16:22,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (1/1) ... [2021-02-23 14:16:22,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (1/1) ... [2021-02-23 14:16:22,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (1/1) ... [2021-02-23 14:16:22,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (1/1) ... [2021-02-23 14:16:22,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (1/1) ... [2021-02-23 14:16:22,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (1/1) ... [2021-02-23 14:16:22,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 14:16:22,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 14:16:22,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 14:16:22,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 14:16:22,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:16:23,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 14:16:23,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 14:16:23,000 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 14:16:23,000 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 14:16:23,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 14:16:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 14:16:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 14:16:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 14:16:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 14:16:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 14:16:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-23 14:16:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 14:16:23,005 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-23 14:16:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 14:16:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-23 14:16:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-23 14:16:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-23 14:16:23,006 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-23 14:16:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-23 14:16:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-23 14:16:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-23 14:16:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 14:16:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 14:16:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 14:16:23,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 14:16:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 14:16:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 14:16:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 14:16:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 14:16:23,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 14:16:27,620 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 14:16:27,620 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 14:16:27,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:16:27 BoogieIcfgContainer [2021-02-23 14:16:27,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 14:16:27,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 14:16:27,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 14:16:27,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 14:16:27,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:16:19" (1/3) ... [2021-02-23 14:16:27,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7f4a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:16:27, skipping insertion in model container [2021-02-23 14:16:27,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:16:22" (2/3) ... [2021-02-23 14:16:27,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7f4a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:16:27, skipping insertion in model container [2021-02-23 14:16:27,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:16:27" (3/3) ... [2021-02-23 14:16:27,633 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-02-23 14:16:27,640 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 14:16:27,645 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-02-23 14:16:27,663 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-02-23 14:16:27,697 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 14:16:27,697 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 14:16:27,697 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 14:16:27,697 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 14:16:27,697 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 14:16:27,698 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 14:16:27,698 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 14:16:27,698 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 14:16:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2021-02-23 14:16:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-02-23 14:16:27,783 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:16:27,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:16:27,785 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:16:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:16:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1952144117, now seen corresponding path program 1 times [2021-02-23 14:16:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:16:27,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271055875] [2021-02-23 14:16:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:16:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:29,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:29,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:29,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:29,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:16:29,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:29,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:16:29,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:29,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:30,901 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:16:30,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:16:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:30,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:30,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:16:31,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271055875] [2021-02-23 14:16:31,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:16:31,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:16:31,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122525228] [2021-02-23 14:16:31,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:16:31,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:16:31,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:16:31,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:16:31,405 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 5 states. [2021-02-23 14:16:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:16:48,626 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2021-02-23 14:16:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 14:16:48,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2021-02-23 14:16:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:16:48,663 INFO L225 Difference]: With dead ends: 4460 [2021-02-23 14:16:48,663 INFO L226 Difference]: Without dead ends: 2963 [2021-02-23 14:16:48,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:16:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-02-23 14:16:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2021-02-23 14:16:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2021-02-23 14:16:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2021-02-23 14:16:48,905 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2021-02-23 14:16:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:16:48,906 INFO L480 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2021-02-23 14:16:48,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:16:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2021-02-23 14:16:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-02-23 14:16:48,925 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:16:48,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:16:48,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 14:16:48,927 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:16:48,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:16:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash -101762350, now seen corresponding path program 1 times [2021-02-23 14:16:48,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:16:48,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977822139] [2021-02-23 14:16:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:16:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:49,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:49,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:49,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:49,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:16:49,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:49,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:50,717 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:16:50,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:16:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:50,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:50,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:16:51,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977822139] [2021-02-23 14:16:51,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:16:51,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:16:51,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106258170] [2021-02-23 14:16:51,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:16:51,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:16:51,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:16:51,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:16:51,161 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states. [2021-02-23 14:17:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:17:10,635 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2021-02-23 14:17:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:17:10,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2021-02-23 14:17:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:17:10,672 INFO L225 Difference]: With dead ends: 8439 [2021-02-23 14:17:10,672 INFO L226 Difference]: Without dead ends: 5747 [2021-02-23 14:17:10,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:17:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2021-02-23 14:17:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2021-02-23 14:17:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2021-02-23 14:17:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions. [2021-02-23 14:17:10,913 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495 [2021-02-23 14:17:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:17:10,917 INFO L480 AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions. [2021-02-23 14:17:10,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:17:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions. [2021-02-23 14:17:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-02-23 14:17:10,942 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:17:10,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:17:10,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 14:17:10,943 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:17:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:17:10,948 INFO L82 PathProgramCache]: Analyzing trace with hash -955066856, now seen corresponding path program 1 times [2021-02-23 14:17:10,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:17:10,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955470310] [2021-02-23 14:17:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:17:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:17:11,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:11,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:11,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:11,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:17:11,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:11,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:12,300 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:17:12,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:17:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:17:12,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:12,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:12,521 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 14:17:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955470310] [2021-02-23 14:17:12,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:17:12,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:17:12,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559378213] [2021-02-23 14:17:12,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:17:12,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:17:12,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:17:12,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:17:12,524 INFO L87 Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states. [2021-02-23 14:17:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:17:31,581 INFO L93 Difference]: Finished difference Result 16979 states and 27804 transitions. [2021-02-23 14:17:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:17:31,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2021-02-23 14:17:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:17:31,640 INFO L225 Difference]: With dead ends: 16979 [2021-02-23 14:17:31,641 INFO L226 Difference]: Without dead ends: 11339 [2021-02-23 14:17:31,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:17:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2021-02-23 14:17:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 5739. [2021-02-23 14:17:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2021-02-23 14:17:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 9398 transitions. [2021-02-23 14:17:31,957 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 9398 transitions. Word has length 496 [2021-02-23 14:17:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:17:31,957 INFO L480 AbstractCegarLoop]: Abstraction has 5739 states and 9398 transitions. [2021-02-23 14:17:31,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:17:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 9398 transitions. [2021-02-23 14:17:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-02-23 14:17:31,972 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:17:31,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:31,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 14:17:31,973 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:17:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:17:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1610898441, now seen corresponding path program 1 times [2021-02-23 14:17:31,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:17:31,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340721039] [2021-02-23 14:17:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:17:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:17:32,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:32,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:32,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:32,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:17:32,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:32,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:33,552 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:17:33,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:17:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:17:33,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:33,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:33,956 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 14:17:33,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340721039] [2021-02-23 14:17:33,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:17:33,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:17:33,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212961783] [2021-02-23 14:17:33,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:17:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:17:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:17:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:17:33,959 INFO L87 Difference]: Start difference. First operand 5739 states and 9398 transitions. Second operand 4 states. [2021-02-23 14:17:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:17:53,767 INFO L93 Difference]: Finished difference Result 16541 states and 26991 transitions. [2021-02-23 14:17:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:17:53,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2021-02-23 14:17:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:17:53,811 INFO L225 Difference]: With dead ends: 16541 [2021-02-23 14:17:53,811 INFO L226 Difference]: Without dead ends: 11201 [2021-02-23 14:17:53,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:17:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2021-02-23 14:17:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 11148. [2021-02-23 14:17:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2021-02-23 14:17:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18172 transitions. [2021-02-23 14:17:54,317 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18172 transitions. Word has length 497 [2021-02-23 14:17:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:17:54,318 INFO L480 AbstractCegarLoop]: Abstraction has 11148 states and 18172 transitions. [2021-02-23 14:17:54,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:17:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18172 transitions. [2021-02-23 14:17:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-02-23 14:17:54,346 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:17:54,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:17:54,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 14:17:54,346 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:17:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:17:54,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1240620526, now seen corresponding path program 1 times [2021-02-23 14:17:54,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:17:54,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859449073] [2021-02-23 14:17:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:17:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:17:54,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:54,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:54,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:54,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:17:54,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:54,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:55,715 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:17:55,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:17:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:17:55,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:55,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:55,987 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 14:17:55,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859449073] [2021-02-23 14:17:55,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:17:55,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:17:55,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411764162] [2021-02-23 14:17:55,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:17:55,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:17:55,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:17:55,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:17:55,989 INFO L87 Difference]: Start difference. First operand 11148 states and 18172 transitions. Second operand 4 states. [2021-02-23 14:18:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:18:16,875 INFO L93 Difference]: Finished difference Result 33188 states and 54071 transitions. [2021-02-23 14:18:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:18:16,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2021-02-23 14:18:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:18:16,931 INFO L225 Difference]: With dead ends: 33188 [2021-02-23 14:18:16,931 INFO L226 Difference]: Without dead ends: 22184 [2021-02-23 14:18:16,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:18:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22184 states. [2021-02-23 14:18:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22184 to 11246. [2021-02-23 14:18:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11246 states. [2021-02-23 14:18:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 18323 transitions. [2021-02-23 14:18:17,564 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 18323 transitions. Word has length 497 [2021-02-23 14:18:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:18:17,564 INFO L480 AbstractCegarLoop]: Abstraction has 11246 states and 18323 transitions. [2021-02-23 14:18:17,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:18:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 18323 transitions. [2021-02-23 14:18:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-02-23 14:18:17,592 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:18:17,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:18:17,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 14:18:17,594 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:18:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:18:17,594 INFO L82 PathProgramCache]: Analyzing trace with hash 995158407, now seen corresponding path program 1 times [2021-02-23 14:18:17,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:18:17,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435287300] [2021-02-23 14:18:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:18:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:18:17,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:17,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:18:17,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:17,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:18:17,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:17,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:18:19,011 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:18:19,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:18:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:18:19,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:19,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:18:19,229 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 14:18:19,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435287300] [2021-02-23 14:18:19,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:18:19,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:18:19,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568435958] [2021-02-23 14:18:19,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:18:19,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:18:19,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:18:19,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:18:19,231 INFO L87 Difference]: Start difference. First operand 11246 states and 18323 transitions. Second operand 4 states. [2021-02-23 14:18:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:18:40,565 INFO L93 Difference]: Finished difference Result 33323 states and 54252 transitions. [2021-02-23 14:18:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:18:40,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2021-02-23 14:18:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:18:40,615 INFO L225 Difference]: With dead ends: 33323 [2021-02-23 14:18:40,615 INFO L226 Difference]: Without dead ends: 22301 [2021-02-23 14:18:40,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:18:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22301 states. [2021-02-23 14:18:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22301 to 11363. [2021-02-23 14:18:41,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11363 states. [2021-02-23 14:18:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18469 transitions. [2021-02-23 14:18:41,378 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18469 transitions. Word has length 498 [2021-02-23 14:18:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:18:41,378 INFO L480 AbstractCegarLoop]: Abstraction has 11363 states and 18469 transitions. [2021-02-23 14:18:41,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:18:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18469 transitions. [2021-02-23 14:18:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-23 14:18:41,402 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:18:41,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:18:41,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 14:18:41,403 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:18:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:18:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1309915419, now seen corresponding path program 1 times [2021-02-23 14:18:41,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:18:41,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199506508] [2021-02-23 14:18:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:18:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:18:41,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:41,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:18:41,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:41,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:18:41,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:41,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:18:42,812 WARN L202 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:18:42,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:18:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:18:42,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:42,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:18:43,141 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 14:18:43,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199506508] [2021-02-23 14:18:43,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:18:43,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:18:43,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871063337] [2021-02-23 14:18:43,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:18:43,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:18:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:18:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:18:43,144 INFO L87 Difference]: Start difference. First operand 11363 states and 18469 transitions. Second operand 4 states. [2021-02-23 14:18:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:18:57,596 INFO L93 Difference]: Finished difference Result 21947 states and 35242 transitions. [2021-02-23 14:18:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:18:57,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2021-02-23 14:18:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:18:57,621 INFO L225 Difference]: With dead ends: 21947 [2021-02-23 14:18:57,621 INFO L226 Difference]: Without dead ends: 15101 [2021-02-23 14:18:57,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:18:57,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15101 states. [2021-02-23 14:18:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15101 to 12963. [2021-02-23 14:18:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12963 states. [2021-02-23 14:18:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12963 states to 12963 states and 21117 transitions. [2021-02-23 14:18:58,174 INFO L78 Accepts]: Start accepts. Automaton has 12963 states and 21117 transitions. Word has length 499 [2021-02-23 14:18:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:18:58,174 INFO L480 AbstractCegarLoop]: Abstraction has 12963 states and 21117 transitions. [2021-02-23 14:18:58,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:18:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 12963 states and 21117 transitions. [2021-02-23 14:18:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-23 14:18:58,196 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:18:58,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:18:58,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 14:18:58,196 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:18:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:18:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash -591822596, now seen corresponding path program 1 times [2021-02-23 14:18:58,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:18:58,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486256780] [2021-02-23 14:18:58,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:18:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:18:58,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:58,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:18:58,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:58,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:18:58,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:58,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:18:59,739 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:18:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:18:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:18:59,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:18:59,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:00,152 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 14:19:00,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486256780] [2021-02-23 14:19:00,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:19:00,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:19:00,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899144298] [2021-02-23 14:19:00,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:19:00,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:19:00,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:19:00,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:19:00,156 INFO L87 Difference]: Start difference. First operand 12963 states and 21117 transitions. Second operand 4 states. [2021-02-23 14:19:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:19:22,306 INFO L93 Difference]: Finished difference Result 37125 states and 60352 transitions. [2021-02-23 14:19:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:19:22,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2021-02-23 14:19:22,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:19:22,341 INFO L225 Difference]: With dead ends: 37125 [2021-02-23 14:19:22,341 INFO L226 Difference]: Without dead ends: 25131 [2021-02-23 14:19:22,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:19:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25131 states. [2021-02-23 14:19:23,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25131 to 25080. [2021-02-23 14:19:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25080 states. [2021-02-23 14:19:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 40686 transitions. [2021-02-23 14:19:23,703 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 40686 transitions. Word has length 499 [2021-02-23 14:19:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:19:23,704 INFO L480 AbstractCegarLoop]: Abstraction has 25080 states and 40686 transitions. [2021-02-23 14:19:23,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:19:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 40686 transitions. [2021-02-23 14:19:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-23 14:19:23,740 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:19:23,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:19:23,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 14:19:23,741 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:19:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:19:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash 969883327, now seen corresponding path program 1 times [2021-02-23 14:19:23,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:19:23,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994818367] [2021-02-23 14:19:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:19:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:19:24,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:24,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:24,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:24,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:19:24,472 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 14:19:24,474 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 14:19:24,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:24,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:19:24,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:24,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:25,702 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:19:25,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:19:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:19:25,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:25,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:26,306 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 14:19:26,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994818367] [2021-02-23 14:19:26,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:19:26,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:19:26,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636240607] [2021-02-23 14:19:26,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:19:26,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:19:26,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:19:26,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:19:26,308 INFO L87 Difference]: Start difference. First operand 25080 states and 40686 transitions. Second operand 6 states. [2021-02-23 14:19:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:19:45,785 INFO L93 Difference]: Finished difference Result 73663 states and 119508 transitions. [2021-02-23 14:19:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:19:45,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 499 [2021-02-23 14:19:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:19:45,833 INFO L225 Difference]: With dead ends: 73663 [2021-02-23 14:19:45,833 INFO L226 Difference]: Without dead ends: 48801 [2021-02-23 14:19:45,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:19:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48801 states. [2021-02-23 14:19:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48801 to 48756. [2021-02-23 14:19:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48756 states. [2021-02-23 14:19:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48756 states to 48756 states and 78765 transitions. [2021-02-23 14:19:48,240 INFO L78 Accepts]: Start accepts. Automaton has 48756 states and 78765 transitions. Word has length 499 [2021-02-23 14:19:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:19:48,241 INFO L480 AbstractCegarLoop]: Abstraction has 48756 states and 78765 transitions. [2021-02-23 14:19:48,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:19:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 48756 states and 78765 transitions. [2021-02-23 14:19:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-02-23 14:19:48,291 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:19:48,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:19:48,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 14:19:48,292 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:19:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:19:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash -512125470, now seen corresponding path program 1 times [2021-02-23 14:19:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:19:48,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299226783] [2021-02-23 14:19:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:19:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:19:48,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:48,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:48,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:48,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:19:48,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:48,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:49,964 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:19:49,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:19:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:19:49,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:49,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:50,655 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 14:19:50,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299226783] [2021-02-23 14:19:50,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:19:50,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:19:50,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381622098] [2021-02-23 14:19:50,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:19:50,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:19:50,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:19:50,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:19:50,659 INFO L87 Difference]: Start difference. First operand 48756 states and 78765 transitions. Second operand 4 states. [2021-02-23 14:20:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:20:16,535 INFO L93 Difference]: Finished difference Result 143277 states and 231272 transitions. [2021-02-23 14:20:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:20:16,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2021-02-23 14:20:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:20:16,642 INFO L225 Difference]: With dead ends: 143277 [2021-02-23 14:20:16,642 INFO L226 Difference]: Without dead ends: 96063 [2021-02-23 14:20:16,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:20:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96063 states. [2021-02-23 14:20:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96063 to 96022. [2021-02-23 14:20:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96022 states. [2021-02-23 14:20:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96022 states to 96022 states and 154547 transitions. [2021-02-23 14:20:21,402 INFO L78 Accepts]: Start accepts. Automaton has 96022 states and 154547 transitions. Word has length 501 [2021-02-23 14:20:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:20:21,403 INFO L480 AbstractCegarLoop]: Abstraction has 96022 states and 154547 transitions. [2021-02-23 14:20:21,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:20:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 96022 states and 154547 transitions. [2021-02-23 14:20:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-02-23 14:20:21,501 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:20:21,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:20:21,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 14:20:21,502 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:20:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:20:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2061071050, now seen corresponding path program 1 times [2021-02-23 14:20:21,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:20:21,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173665929] [2021-02-23 14:20:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:20:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:20:22,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:20:22,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:20:22,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:20:22,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:20:22,694 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-23 14:20:22,696 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-23 14:20:22,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:20:22,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:20:22,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:20:22,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:20:24,005 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:20:24,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:20:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:20:24,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:20:24,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:20:24,374 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 14:20:24,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173665929] [2021-02-23 14:20:24,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:20:24,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:20:24,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065213156] [2021-02-23 14:20:24,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:20:24,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:20:24,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:20:24,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:20:24,377 INFO L87 Difference]: Start difference. First operand 96022 states and 154547 transitions. Second operand 6 states. [2021-02-23 14:20:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:20:51,538 INFO L93 Difference]: Finished difference Result 284707 states and 458330 transitions. [2021-02-23 14:20:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:20:51,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 503 [2021-02-23 14:20:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:20:51,805 INFO L225 Difference]: With dead ends: 284707 [2021-02-23 14:20:51,805 INFO L226 Difference]: Without dead ends: 189022 [2021-02-23 14:20:51,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:20:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189022 states. [2021-02-23 14:21:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189022 to 188989. [2021-02-23 14:21:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188989 states. [2021-02-23 14:21:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188989 states to 188989 states and 302949 transitions. [2021-02-23 14:21:02,624 INFO L78 Accepts]: Start accepts. Automaton has 188989 states and 302949 transitions. Word has length 503 [2021-02-23 14:21:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:21:02,625 INFO L480 AbstractCegarLoop]: Abstraction has 188989 states and 302949 transitions. [2021-02-23 14:21:02,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:21:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 188989 states and 302949 transitions. [2021-02-23 14:21:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-02-23 14:21:02,767 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:21:02,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:21:02,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 14:21:02,768 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:21:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:21:02,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2033396489, now seen corresponding path program 1 times [2021-02-23 14:21:02,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:21:02,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999923118] [2021-02-23 14:21:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:21:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:21:03,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:21:03,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:21:03,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:21:03,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:21:03,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:21:03,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:21:03,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:21:03,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:21:04,830 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:21:04,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:21:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:21:04,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:21:04,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:21:05,269 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 14:21:05,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999923118] [2021-02-23 14:21:05,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:21:05,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:21:05,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572931650] [2021-02-23 14:21:05,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:21:05,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:21:05,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:21:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:21:05,272 INFO L87 Difference]: Start difference. First operand 188989 states and 302949 transitions. Second operand 5 states. [2021-02-23 14:21:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:21:40,781 INFO L93 Difference]: Finished difference Result 561355 states and 899643 transitions. [2021-02-23 14:21:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:21:40,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2021-02-23 14:21:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:21:41,541 INFO L225 Difference]: With dead ends: 561355 [2021-02-23 14:21:41,541 INFO L226 Difference]: Without dead ends: 373217 [2021-02-23 14:21:41,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:21:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373217 states. [2021-02-23 14:22:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373217 to 372495. [2021-02-23 14:22:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372495 states. [2021-02-23 14:22:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372495 states to 372495 states and 594727 transitions. [2021-02-23 14:22:03,516 INFO L78 Accepts]: Start accepts. Automaton has 372495 states and 594727 transitions. Word has length 505 [2021-02-23 14:22:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:22:03,516 INFO L480 AbstractCegarLoop]: Abstraction has 372495 states and 594727 transitions. [2021-02-23 14:22:03,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:22:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 372495 states and 594727 transitions. [2021-02-23 14:22:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-02-23 14:22:04,296 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:22:04,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:22:04,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 14:22:04,297 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:22:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:22:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -219530448, now seen corresponding path program 1 times [2021-02-23 14:22:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:22:04,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833083564] [2021-02-23 14:22:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:22:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:22:04,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:22:04,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:22:04,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:22:04,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:22:04,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:22:04,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:22:06,098 WARN L202 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 430 [2021-02-23 14:22:06,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:22:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:22:06,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:22:06,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:22:06,464 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 14:22:06,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833083564] [2021-02-23 14:22:06,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:22:06,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:22:06,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867348871] [2021-02-23 14:22:06,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:22:06,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:22:06,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:22:06,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:22:06,466 INFO L87 Difference]: Start difference. First operand 372495 states and 594727 transitions. Second operand 4 states.