/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:24:22,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:24:22,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:24:22,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:24:22,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:24:22,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:24:22,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:24:22,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:24:22,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:24:22,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:24:22,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:24:22,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:24:22,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:24:22,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:24:22,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:24:22,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:24:22,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:24:22,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:24:22,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:24:22,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:24:22,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:24:22,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:24:22,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:24:22,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:24:22,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 08:24:22,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 08:24:22,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 08:24:22,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 08:24:22,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 08:24:22,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 08:24:22,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:24:22,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:24:22,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:24:22,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:24:22,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:24:22,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:24:22,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:24:22,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:24:22,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:24:22,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:24:22,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:24:22,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:24:22,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:24:22,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:24:22,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:24:22,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:24:22,864 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:24:22,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:24:22,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:24:22,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:24:22,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:24:22,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:24:22,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:24:22,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:24:22,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:24:22,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:24:22,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:24:22,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:24:22,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:24:22,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:24:22,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:24:22,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:24:22,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:24:22,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:24:22,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:24:22,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:24:22,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:24:22,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:24:23,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:24:23,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:24:23,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:24:23,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:24:23,329 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:24:23,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:24:23,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41890119/dabfcd5057a947fdb6aeee56fbb3a5a9/FLAG4dbd762f4 [2020-12-22 08:24:24,244 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:24:24,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:24:24,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41890119/dabfcd5057a947fdb6aeee56fbb3a5a9/FLAG4dbd762f4 [2020-12-22 08:24:24,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41890119/dabfcd5057a947fdb6aeee56fbb3a5a9 [2020-12-22 08:24:24,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:24:24,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:24:24,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:24:24,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:24:24,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:24:24,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:24:24" (1/1) ... [2020-12-22 08:24:24,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44837fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:24, skipping insertion in model container [2020-12-22 08:24:24,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:24:24" (1/1) ... [2020-12-22 08:24:24,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:24:24,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:24:24,948 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9584,9597] [2020-12-22 08:24:25,117 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24113,24126] [2020-12-22 08:24:25,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:24:25,424 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:24:25,469 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9584,9597] [2020-12-22 08:24:25,528 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24113,24126] [2020-12-22 08:24:25,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:24:25,715 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:24:25,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25 WrapperNode [2020-12-22 08:24:25,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:24:25,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:24:25,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:24:25,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:24:25,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:25,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:25,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:24:25,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:24:25,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:24:25,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:24:25,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:25,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:25,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:25,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:25,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:26,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:26,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (1/1) ... [2020-12-22 08:24:26,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:24:26,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:24:26,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:24:26,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:24:26,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (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 [2020-12-22 08:24:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:24:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:24:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:24:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:24:28,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:24:28,712 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:24:28,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:24:28 BoogieIcfgContainer [2020-12-22 08:24:28,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:24:28,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:24:28,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:24:28,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:24:28,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:24:24" (1/3) ... [2020-12-22 08:24:28,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66da905d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:24:28, skipping insertion in model container [2020-12-22 08:24:28,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:25" (2/3) ... [2020-12-22 08:24:28,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66da905d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:24:28, skipping insertion in model container [2020-12-22 08:24:28,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:24:28" (3/3) ... [2020-12-22 08:24:28,725 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-12-22 08:24:28,731 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:24:28,737 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 08:24:28,756 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 08:24:28,789 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:24:28,789 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:24:28,789 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:24:28,789 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:24:28,790 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:24:28,790 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:24:28,790 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:24:28,790 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:24:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states. [2020-12-22 08:24:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:24:28,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:28,839 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] [2020-12-22 08:24:28,840 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1557815088, now seen corresponding path program 1 times [2020-12-22 08:24:28,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:28,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499533959] [2020-12-22 08:24:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:29,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499533959] [2020-12-22 08:24:29,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:29,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:29,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162338255] [2020-12-22 08:24:29,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:29,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:29,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:29,407 INFO L87 Difference]: Start difference. First operand 702 states. Second operand 3 states. [2020-12-22 08:24:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:29,605 INFO L93 Difference]: Finished difference Result 1063 states and 1849 transitions. [2020-12-22 08:24:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:29,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:24:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:29,629 INFO L225 Difference]: With dead ends: 1063 [2020-12-22 08:24:29,629 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 08:24:29,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 08:24:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2020-12-22 08:24:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-12-22 08:24:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1150 transitions. [2020-12-22 08:24:29,735 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1150 transitions. Word has length 62 [2020-12-22 08:24:29,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:29,735 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1150 transitions. [2020-12-22 08:24:29,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1150 transitions. [2020-12-22 08:24:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:24:29,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:29,740 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] [2020-12-22 08:24:29,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:24:29,740 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash 701475668, now seen corresponding path program 1 times [2020-12-22 08:24:29,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:29,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483669400] [2020-12-22 08:24:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:29,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483669400] [2020-12-22 08:24:29,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:29,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:29,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299382266] [2020-12-22 08:24:29,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:29,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:29,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:29,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:29,900 INFO L87 Difference]: Start difference. First operand 840 states and 1150 transitions. Second operand 3 states. [2020-12-22 08:24:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:30,114 INFO L93 Difference]: Finished difference Result 1461 states and 2022 transitions. [2020-12-22 08:24:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:30,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:24:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:30,121 INFO L225 Difference]: With dead ends: 1461 [2020-12-22 08:24:30,122 INFO L226 Difference]: Without dead ends: 1221 [2020-12-22 08:24:30,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2020-12-22 08:24:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1217. [2020-12-22 08:24:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2020-12-22 08:24:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1652 transitions. [2020-12-22 08:24:30,172 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1652 transitions. Word has length 63 [2020-12-22 08:24:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:30,173 INFO L481 AbstractCegarLoop]: Abstraction has 1217 states and 1652 transitions. [2020-12-22 08:24:30,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1652 transitions. [2020-12-22 08:24:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:24:30,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:30,177 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] [2020-12-22 08:24:30,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:24:30,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:30,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:30,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1921206290, now seen corresponding path program 1 times [2020-12-22 08:24:30,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:30,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561042881] [2020-12-22 08:24:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:30,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561042881] [2020-12-22 08:24:30,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:30,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:30,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265123114] [2020-12-22 08:24:30,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:30,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:30,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:30,276 INFO L87 Difference]: Start difference. First operand 1217 states and 1652 transitions. Second operand 3 states. [2020-12-22 08:24:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:30,429 INFO L93 Difference]: Finished difference Result 2215 states and 3114 transitions. [2020-12-22 08:24:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:30,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:24:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:30,442 INFO L225 Difference]: With dead ends: 2215 [2020-12-22 08:24:30,443 INFO L226 Difference]: Without dead ends: 1684 [2020-12-22 08:24:30,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2020-12-22 08:24:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1680. [2020-12-22 08:24:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 08:24:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2314 transitions. [2020-12-22 08:24:30,531 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2314 transitions. Word has length 63 [2020-12-22 08:24:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:30,532 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 2314 transitions. [2020-12-22 08:24:30,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2314 transitions. [2020-12-22 08:24:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:24:30,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:30,536 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] [2020-12-22 08:24:30,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:24:30,537 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash 951298247, now seen corresponding path program 1 times [2020-12-22 08:24:30,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:30,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428080854] [2020-12-22 08:24:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:30,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428080854] [2020-12-22 08:24:30,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:30,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:30,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854467074] [2020-12-22 08:24:30,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:30,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:30,674 INFO L87 Difference]: Start difference. First operand 1680 states and 2314 transitions. Second operand 6 states. [2020-12-22 08:24:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:31,532 INFO L93 Difference]: Finished difference Result 4414 states and 6244 transitions. [2020-12-22 08:24:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:31,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-12-22 08:24:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:31,548 INFO L225 Difference]: With dead ends: 4414 [2020-12-22 08:24:31,549 INFO L226 Difference]: Without dead ends: 2958 [2020-12-22 08:24:31,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2020-12-22 08:24:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2954. [2020-12-22 08:24:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-12-22 08:24:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4182 transitions. [2020-12-22 08:24:31,713 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4182 transitions. Word has length 63 [2020-12-22 08:24:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:31,714 INFO L481 AbstractCegarLoop]: Abstraction has 2954 states and 4182 transitions. [2020-12-22 08:24:31,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4182 transitions. [2020-12-22 08:24:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:24:31,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:31,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:24:31,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:24:31,719 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:31,720 INFO L82 PathProgramCache]: Analyzing trace with hash -778566540, now seen corresponding path program 1 times [2020-12-22 08:24:31,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:31,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075552050] [2020-12-22 08:24:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:31,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075552050] [2020-12-22 08:24:31,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:31,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:31,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897738768] [2020-12-22 08:24:31,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:31,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:31,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:31,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:31,788 INFO L87 Difference]: Start difference. First operand 2954 states and 4182 transitions. Second operand 3 states. [2020-12-22 08:24:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:32,071 INFO L93 Difference]: Finished difference Result 6478 states and 9295 transitions. [2020-12-22 08:24:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:32,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:24:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:32,094 INFO L225 Difference]: With dead ends: 6478 [2020-12-22 08:24:32,094 INFO L226 Difference]: Without dead ends: 4265 [2020-12-22 08:24:32,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4265 states. [2020-12-22 08:24:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4265 to 4247. [2020-12-22 08:24:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4247 states. [2020-12-22 08:24:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 5982 transitions. [2020-12-22 08:24:32,365 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 5982 transitions. Word has length 64 [2020-12-22 08:24:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:32,365 INFO L481 AbstractCegarLoop]: Abstraction has 4247 states and 5982 transitions. [2020-12-22 08:24:32,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 5982 transitions. [2020-12-22 08:24:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:24:32,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:32,372 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] [2020-12-22 08:24:32,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:24:32,372 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash -535437974, now seen corresponding path program 1 times [2020-12-22 08:24:32,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:32,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856410739] [2020-12-22 08:24:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:32,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856410739] [2020-12-22 08:24:32,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:32,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:32,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058156351] [2020-12-22 08:24:32,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:32,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:32,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:32,548 INFO L87 Difference]: Start difference. First operand 4247 states and 5982 transitions. Second operand 6 states. [2020-12-22 08:24:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:33,677 INFO L93 Difference]: Finished difference Result 11930 states and 17024 transitions. [2020-12-22 08:24:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:33,678 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 08:24:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:33,720 INFO L225 Difference]: With dead ends: 11930 [2020-12-22 08:24:33,721 INFO L226 Difference]: Without dead ends: 8017 [2020-12-22 08:24:33,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8017 states. [2020-12-22 08:24:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8017 to 7969. [2020-12-22 08:24:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7969 states. [2020-12-22 08:24:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7969 states to 7969 states and 11358 transitions. [2020-12-22 08:24:34,274 INFO L78 Accepts]: Start accepts. Automaton has 7969 states and 11358 transitions. Word has length 65 [2020-12-22 08:24:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:34,275 INFO L481 AbstractCegarLoop]: Abstraction has 7969 states and 11358 transitions. [2020-12-22 08:24:34,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 7969 states and 11358 transitions. [2020-12-22 08:24:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:24:34,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:34,282 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] [2020-12-22 08:24:34,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:24:34,283 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:34,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:34,283 INFO L82 PathProgramCache]: Analyzing trace with hash -881934793, now seen corresponding path program 1 times [2020-12-22 08:24:34,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:34,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839815404] [2020-12-22 08:24:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:34,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839815404] [2020-12-22 08:24:34,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:34,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:24:34,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73049876] [2020-12-22 08:24:34,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:24:34,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:24:34,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:24:34,364 INFO L87 Difference]: Start difference. First operand 7969 states and 11358 transitions. Second operand 5 states. [2020-12-22 08:24:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:35,560 INFO L93 Difference]: Finished difference Result 18891 states and 26984 transitions. [2020-12-22 08:24:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:35,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 08:24:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:35,612 INFO L225 Difference]: With dead ends: 18891 [2020-12-22 08:24:35,612 INFO L226 Difference]: Without dead ends: 11207 [2020-12-22 08:24:35,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:24:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2020-12-22 08:24:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 7969. [2020-12-22 08:24:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7969 states. [2020-12-22 08:24:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7969 states to 7969 states and 11307 transitions. [2020-12-22 08:24:36,280 INFO L78 Accepts]: Start accepts. Automaton has 7969 states and 11307 transitions. Word has length 66 [2020-12-22 08:24:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:36,281 INFO L481 AbstractCegarLoop]: Abstraction has 7969 states and 11307 transitions. [2020-12-22 08:24:36,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:24:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7969 states and 11307 transitions. [2020-12-22 08:24:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:24:36,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:36,290 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] [2020-12-22 08:24:36,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:24:36,290 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash -741572489, now seen corresponding path program 1 times [2020-12-22 08:24:36,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:36,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549406134] [2020-12-22 08:24:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:36,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549406134] [2020-12-22 08:24:36,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:36,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:36,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338470569] [2020-12-22 08:24:36,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:24:36,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:24:36,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:24:36,415 INFO L87 Difference]: Start difference. First operand 7969 states and 11307 transitions. Second operand 7 states. [2020-12-22 08:24:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:39,190 INFO L93 Difference]: Finished difference Result 32043 states and 46487 transitions. [2020-12-22 08:24:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:24:39,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 08:24:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:39,268 INFO L225 Difference]: With dead ends: 32043 [2020-12-22 08:24:39,268 INFO L226 Difference]: Without dead ends: 29239 [2020-12-22 08:24:39,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:24:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29239 states. [2020-12-22 08:24:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29239 to 7993. [2020-12-22 08:24:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7993 states. [2020-12-22 08:24:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7993 states to 7993 states and 11339 transitions. [2020-12-22 08:24:40,325 INFO L78 Accepts]: Start accepts. Automaton has 7993 states and 11339 transitions. Word has length 66 [2020-12-22 08:24:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:40,326 INFO L481 AbstractCegarLoop]: Abstraction has 7993 states and 11339 transitions. [2020-12-22 08:24:40,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:24:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7993 states and 11339 transitions. [2020-12-22 08:24:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:24:40,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:40,333 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] [2020-12-22 08:24:40,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:24:40,334 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1492647215, now seen corresponding path program 1 times [2020-12-22 08:24:40,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:40,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255926491] [2020-12-22 08:24:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:40,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255926491] [2020-12-22 08:24:40,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:40,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:40,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202334161] [2020-12-22 08:24:40,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:24:40,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:24:40,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:24:40,465 INFO L87 Difference]: Start difference. First operand 7993 states and 11339 transitions. Second operand 7 states. [2020-12-22 08:24:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:43,359 INFO L93 Difference]: Finished difference Result 28532 states and 40885 transitions. [2020-12-22 08:24:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:24:43,360 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-12-22 08:24:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:43,435 INFO L225 Difference]: With dead ends: 28532 [2020-12-22 08:24:43,436 INFO L226 Difference]: Without dead ends: 25308 [2020-12-22 08:24:43,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:24:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25308 states. [2020-12-22 08:24:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25308 to 8021. [2020-12-22 08:24:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8021 states. [2020-12-22 08:24:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8021 states to 8021 states and 11375 transitions. [2020-12-22 08:24:44,332 INFO L78 Accepts]: Start accepts. Automaton has 8021 states and 11375 transitions. Word has length 67 [2020-12-22 08:24:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:44,333 INFO L481 AbstractCegarLoop]: Abstraction has 8021 states and 11375 transitions. [2020-12-22 08:24:44,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:24:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 8021 states and 11375 transitions. [2020-12-22 08:24:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:24:44,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:44,340 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] [2020-12-22 08:24:44,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:24:44,341 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:44,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1629228246, now seen corresponding path program 1 times [2020-12-22 08:24:44,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:44,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183408193] [2020-12-22 08:24:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:44,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183408193] [2020-12-22 08:24:44,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:44,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:44,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057663349] [2020-12-22 08:24:44,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:44,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:44,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:44,451 INFO L87 Difference]: Start difference. First operand 8021 states and 11375 transitions. Second operand 6 states. [2020-12-22 08:24:46,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:46,296 INFO L93 Difference]: Finished difference Result 24167 states and 34407 transitions. [2020-12-22 08:24:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:46,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:24:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:46,333 INFO L225 Difference]: With dead ends: 24167 [2020-12-22 08:24:46,333 INFO L226 Difference]: Without dead ends: 16454 [2020-12-22 08:24:46,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16454 states. [2020-12-22 08:24:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16454 to 16346. [2020-12-22 08:24:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16346 states. [2020-12-22 08:24:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16346 states to 16346 states and 23197 transitions. [2020-12-22 08:24:48,290 INFO L78 Accepts]: Start accepts. Automaton has 16346 states and 23197 transitions. Word has length 67 [2020-12-22 08:24:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:48,290 INFO L481 AbstractCegarLoop]: Abstraction has 16346 states and 23197 transitions. [2020-12-22 08:24:48,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16346 states and 23197 transitions. [2020-12-22 08:24:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:24:48,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:48,299 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] [2020-12-22 08:24:48,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:24:48,300 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:48,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1569192756, now seen corresponding path program 1 times [2020-12-22 08:24:48,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:48,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528678869] [2020-12-22 08:24:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:48,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528678869] [2020-12-22 08:24:48,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:48,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:48,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065041861] [2020-12-22 08:24:48,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:24:48,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:24:48,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:24:48,395 INFO L87 Difference]: Start difference. First operand 16346 states and 23197 transitions. Second operand 7 states. [2020-12-22 08:24:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:55,190 INFO L93 Difference]: Finished difference Result 76890 states and 110533 transitions. [2020-12-22 08:24:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:24:55,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-12-22 08:24:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:55,307 INFO L225 Difference]: With dead ends: 76890 [2020-12-22 08:24:55,307 INFO L226 Difference]: Without dead ends: 68958 [2020-12-22 08:24:55,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:24:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68958 states. [2020-12-22 08:24:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68958 to 16443. [2020-12-22 08:24:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16443 states. [2020-12-22 08:24:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16443 states to 16443 states and 23326 transitions. [2020-12-22 08:24:57,487 INFO L78 Accepts]: Start accepts. Automaton has 16443 states and 23326 transitions. Word has length 68 [2020-12-22 08:24:57,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:57,487 INFO L481 AbstractCegarLoop]: Abstraction has 16443 states and 23326 transitions. [2020-12-22 08:24:57,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:24:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 16443 states and 23326 transitions. [2020-12-22 08:24:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:24:57,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:57,497 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] [2020-12-22 08:24:57,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:24:57,497 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1812754967, now seen corresponding path program 1 times [2020-12-22 08:24:57,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:57,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146799067] [2020-12-22 08:24:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:57,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146799067] [2020-12-22 08:24:57,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:57,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:24:57,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982796933] [2020-12-22 08:24:57,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:24:57,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:24:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:24:57,713 INFO L87 Difference]: Start difference. First operand 16443 states and 23326 transitions. Second operand 9 states. [2020-12-22 08:25:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:04,287 INFO L93 Difference]: Finished difference Result 54043 states and 78168 transitions. [2020-12-22 08:25:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:25:04,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-12-22 08:25:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:04,337 INFO L225 Difference]: With dead ends: 54043 [2020-12-22 08:25:04,337 INFO L226 Difference]: Without dead ends: 40933 [2020-12-22 08:25:04,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:25:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40933 states. [2020-12-22 08:25:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40933 to 16439. [2020-12-22 08:25:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16439 states. [2020-12-22 08:25:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16439 states to 16439 states and 23318 transitions. [2020-12-22 08:25:06,230 INFO L78 Accepts]: Start accepts. Automaton has 16439 states and 23318 transitions. Word has length 69 [2020-12-22 08:25:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:06,231 INFO L481 AbstractCegarLoop]: Abstraction has 16439 states and 23318 transitions. [2020-12-22 08:25:06,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:25:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 16439 states and 23318 transitions. [2020-12-22 08:25:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:25:06,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:06,240 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] [2020-12-22 08:25:06,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:25:06,240 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash -445002902, now seen corresponding path program 1 times [2020-12-22 08:25:06,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:06,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145660994] [2020-12-22 08:25:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:06,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145660994] [2020-12-22 08:25:06,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:06,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:25:06,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298519482] [2020-12-22 08:25:06,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:25:06,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:06,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:25:06,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:25:06,495 INFO L87 Difference]: Start difference. First operand 16439 states and 23318 transitions. Second operand 10 states. [2020-12-22 08:25:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:15,910 INFO L93 Difference]: Finished difference Result 57885 states and 82914 transitions. [2020-12-22 08:25:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:25:15,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-12-22 08:25:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:15,999 INFO L225 Difference]: With dead ends: 57885 [2020-12-22 08:25:15,999 INFO L226 Difference]: Without dead ends: 51406 [2020-12-22 08:25:16,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2020-12-22 08:25:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51406 states. [2020-12-22 08:25:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51406 to 16439. [2020-12-22 08:25:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16439 states. [2020-12-22 08:25:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16439 states to 16439 states and 23316 transitions. [2020-12-22 08:25:18,403 INFO L78 Accepts]: Start accepts. Automaton has 16439 states and 23316 transitions. Word has length 69 [2020-12-22 08:25:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:18,403 INFO L481 AbstractCegarLoop]: Abstraction has 16439 states and 23316 transitions. [2020-12-22 08:25:18,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:25:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 16439 states and 23316 transitions. [2020-12-22 08:25:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:25:18,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:18,412 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] [2020-12-22 08:25:18,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:25:18,412 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1293297930, now seen corresponding path program 1 times [2020-12-22 08:25:18,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:18,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528349140] [2020-12-22 08:25:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:18,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528349140] [2020-12-22 08:25:18,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:18,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:25:18,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814386160] [2020-12-22 08:25:18,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:25:18,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:18,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:25:18,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:25:18,614 INFO L87 Difference]: Start difference. First operand 16439 states and 23316 transitions. Second operand 9 states. [2020-12-22 08:25:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:26,230 INFO L93 Difference]: Finished difference Result 54094 states and 78246 transitions. [2020-12-22 08:25:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:25:26,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-12-22 08:25:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:26,388 INFO L225 Difference]: With dead ends: 54094 [2020-12-22 08:25:26,388 INFO L226 Difference]: Without dead ends: 40934 [2020-12-22 08:25:26,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:25:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40934 states. [2020-12-22 08:25:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40934 to 16411. [2020-12-22 08:25:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16411 states. [2020-12-22 08:25:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16411 states to 16411 states and 23272 transitions. [2020-12-22 08:25:28,829 INFO L78 Accepts]: Start accepts. Automaton has 16411 states and 23272 transitions. Word has length 70 [2020-12-22 08:25:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:28,830 INFO L481 AbstractCegarLoop]: Abstraction has 16411 states and 23272 transitions. [2020-12-22 08:25:28,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:25:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 16411 states and 23272 transitions. [2020-12-22 08:25:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:25:28,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:28,837 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] [2020-12-22 08:25:28,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:25:28,837 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1552924457, now seen corresponding path program 1 times [2020-12-22 08:25:28,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:28,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249241436] [2020-12-22 08:25:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:29,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249241436] [2020-12-22 08:25:29,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:29,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:25:29,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042994668] [2020-12-22 08:25:29,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:25:29,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:29,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:25:29,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:25:29,425 INFO L87 Difference]: Start difference. First operand 16411 states and 23272 transitions. Second operand 12 states. [2020-12-22 08:25:29,889 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-22 08:25:30,098 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-12-22 08:25:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:42,502 INFO L93 Difference]: Finished difference Result 80306 states and 116585 transitions. [2020-12-22 08:25:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 08:25:42,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-12-22 08:25:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:42,600 INFO L225 Difference]: With dead ends: 80306 [2020-12-22 08:25:42,600 INFO L226 Difference]: Without dead ends: 67172 [2020-12-22 08:25:42,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:25:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67172 states. [2020-12-22 08:25:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67172 to 16379. [2020-12-22 08:25:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16379 states. [2020-12-22 08:25:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16379 states to 16379 states and 23230 transitions. [2020-12-22 08:25:45,644 INFO L78 Accepts]: Start accepts. Automaton has 16379 states and 23230 transitions. Word has length 70 [2020-12-22 08:25:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:45,644 INFO L481 AbstractCegarLoop]: Abstraction has 16379 states and 23230 transitions. [2020-12-22 08:25:45,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:25:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16379 states and 23230 transitions. [2020-12-22 08:25:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:25:45,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:45,651 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] [2020-12-22 08:25:45,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:25:45,651 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:45,651 INFO L82 PathProgramCache]: Analyzing trace with hash -757708310, now seen corresponding path program 1 times [2020-12-22 08:25:45,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:45,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20332696] [2020-12-22 08:25:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:45,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20332696] [2020-12-22 08:25:45,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:45,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:45,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551681639] [2020-12-22 08:25:45,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:25:45,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:25:45,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:25:45,749 INFO L87 Difference]: Start difference. First operand 16379 states and 23230 transitions. Second operand 7 states. [2020-12-22 08:25:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:58,164 INFO L93 Difference]: Finished difference Result 66953 states and 96046 transitions. [2020-12-22 08:25:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:25:58,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-12-22 08:25:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:58,253 INFO L225 Difference]: With dead ends: 66953 [2020-12-22 08:25:58,253 INFO L226 Difference]: Without dead ends: 59213 [2020-12-22 08:25:58,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:25:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59213 states. [2020-12-22 08:26:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59213 to 16467. [2020-12-22 08:26:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16467 states. [2020-12-22 08:26:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16467 states to 16467 states and 23351 transitions. [2020-12-22 08:26:01,575 INFO L78 Accepts]: Start accepts. Automaton has 16467 states and 23351 transitions. Word has length 70 [2020-12-22 08:26:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:01,575 INFO L481 AbstractCegarLoop]: Abstraction has 16467 states and 23351 transitions. [2020-12-22 08:26:01,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:26:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 16467 states and 23351 transitions. [2020-12-22 08:26:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:26:01,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:01,583 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] [2020-12-22 08:26:01,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:26:01,583 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:01,583 INFO L82 PathProgramCache]: Analyzing trace with hash 55096187, now seen corresponding path program 1 times [2020-12-22 08:26:01,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:01,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872859830] [2020-12-22 08:26:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:01,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872859830] [2020-12-22 08:26:01,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:01,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:26:01,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290301344] [2020-12-22 08:26:01,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:26:01,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:01,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:26:02,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:26:02,000 INFO L87 Difference]: Start difference. First operand 16467 states and 23351 transitions. Second operand 12 states. [2020-12-22 08:26:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:22,445 INFO L93 Difference]: Finished difference Result 102475 states and 149021 transitions. [2020-12-22 08:26:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:26:22,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-12-22 08:26:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:22,571 INFO L225 Difference]: With dead ends: 102475 [2020-12-22 08:26:22,572 INFO L226 Difference]: Without dead ends: 89365 [2020-12-22 08:26:22,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:26:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89365 states. [2020-12-22 08:26:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89365 to 16459. [2020-12-22 08:26:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16459 states. [2020-12-22 08:26:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16459 states to 16459 states and 23335 transitions. [2020-12-22 08:26:26,575 INFO L78 Accepts]: Start accepts. Automaton has 16459 states and 23335 transitions. Word has length 70 [2020-12-22 08:26:26,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:26,576 INFO L481 AbstractCegarLoop]: Abstraction has 16459 states and 23335 transitions. [2020-12-22 08:26:26,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:26:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 16459 states and 23335 transitions. [2020-12-22 08:26:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:26:26,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:26,583 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] [2020-12-22 08:26:26,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:26:26,583 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:26,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1421654202, now seen corresponding path program 1 times [2020-12-22 08:26:26,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:26,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307892578] [2020-12-22 08:26:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:26:27,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307892578] [2020-12-22 08:26:27,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:27,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 08:26:27,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182577256] [2020-12-22 08:26:27,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 08:26:27,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:27,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 08:26:27,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 08:26:27,087 INFO L87 Difference]: Start difference. First operand 16459 states and 23335 transitions. Second operand 14 states. [2020-12-22 08:26:27,233 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 08:26:28,122 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:26:28,475 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 08:26:28,771 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 08:26:29,177 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 08:26:29,320 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:26:29,515 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:26:29,819 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-22 08:26:30,413 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 08:26:31,369 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 08:26:33,207 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 08:26:33,654 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:26:35,014 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:26:38,902 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-22 08:26:41,056 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 08:26:41,758 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:26:42,743 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-22 08:26:45,790 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:27:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:20,987 INFO L93 Difference]: Finished difference Result 189885 states and 275487 transitions. [2020-12-22 08:27:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 08:27:20,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-12-22 08:27:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:21,490 INFO L225 Difference]: With dead ends: 189885 [2020-12-22 08:27:21,490 INFO L226 Difference]: Without dead ends: 182021 [2020-12-22 08:27:21,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 08:27:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182021 states. [2020-12-22 08:27:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182021 to 16427. [2020-12-22 08:27:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16427 states. [2020-12-22 08:27:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16427 states to 16427 states and 23291 transitions. [2020-12-22 08:27:27,259 INFO L78 Accepts]: Start accepts. Automaton has 16427 states and 23291 transitions. Word has length 71 [2020-12-22 08:27:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:27,260 INFO L481 AbstractCegarLoop]: Abstraction has 16427 states and 23291 transitions. [2020-12-22 08:27:27,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 08:27:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 16427 states and 23291 transitions. [2020-12-22 08:27:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:27:27,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:27,268 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] [2020-12-22 08:27:27,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:27:27,268 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash 311572974, now seen corresponding path program 1 times [2020-12-22 08:27:27,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:27,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138204215] [2020-12-22 08:27:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:27:27,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138204215] [2020-12-22 08:27:27,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:27,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:27:27,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497914380] [2020-12-22 08:27:27,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:27:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:27:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:27:27,362 INFO L87 Difference]: Start difference. First operand 16427 states and 23291 transitions. Second operand 7 states. [2020-12-22 08:27:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:27:47,454 INFO L93 Difference]: Finished difference Result 66840 states and 95909 transitions. [2020-12-22 08:27:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:27:47,455 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-12-22 08:27:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:27:47,532 INFO L225 Difference]: With dead ends: 66840 [2020-12-22 08:27:47,532 INFO L226 Difference]: Without dead ends: 59124 [2020-12-22 08:27:47,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:27:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59124 states. [2020-12-22 08:27:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59124 to 16470. [2020-12-22 08:27:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16470 states. [2020-12-22 08:27:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16470 states to 16470 states and 23352 transitions. [2020-12-22 08:27:52,689 INFO L78 Accepts]: Start accepts. Automaton has 16470 states and 23352 transitions. Word has length 71 [2020-12-22 08:27:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:52,689 INFO L481 AbstractCegarLoop]: Abstraction has 16470 states and 23352 transitions. [2020-12-22 08:27:52,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:27:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 16470 states and 23352 transitions. [2020-12-22 08:27:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:27:52,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:52,696 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] [2020-12-22 08:27:52,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:27:52,696 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:52,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1130829185, now seen corresponding path program 1 times [2020-12-22 08:27:52,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:52,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271508950] [2020-12-22 08:27:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:27:52,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271508950] [2020-12-22 08:27:52,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:52,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:27:52,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606427532] [2020-12-22 08:27:52,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:27:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:52,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:27:52,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:27:52,802 INFO L87 Difference]: Start difference. First operand 16470 states and 23352 transitions. Second operand 7 states. [2020-12-22 08:27:53,086 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-12-22 08:28:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:28:17,301 INFO L93 Difference]: Finished difference Result 76581 states and 110169 transitions. [2020-12-22 08:28:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:28:17,302 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-12-22 08:28:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:28:17,402 INFO L225 Difference]: With dead ends: 76581 [2020-12-22 08:28:17,402 INFO L226 Difference]: Without dead ends: 68791 [2020-12-22 08:28:17,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:28:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68791 states. [2020-12-22 08:28:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68791 to 16500. [2020-12-22 08:28:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16500 states. [2020-12-22 08:28:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16500 states to 16500 states and 23392 transitions. [2020-12-22 08:28:22,836 INFO L78 Accepts]: Start accepts. Automaton has 16500 states and 23392 transitions. Word has length 71 [2020-12-22 08:28:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:28:22,836 INFO L481 AbstractCegarLoop]: Abstraction has 16500 states and 23392 transitions. [2020-12-22 08:28:22,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:28:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 16500 states and 23392 transitions. [2020-12-22 08:28:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:28:22,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:28:22,843 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] [2020-12-22 08:28:22,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:28:22,844 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:28:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:28:22,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1491852773, now seen corresponding path program 1 times [2020-12-22 08:28:22,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:28:22,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399060876] [2020-12-22 08:28:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:28:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:28:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:28:23,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399060876] [2020-12-22 08:28:23,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:28:23,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:28:23,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42077740] [2020-12-22 08:28:23,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:28:23,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:28:23,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:28:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:28:23,037 INFO L87 Difference]: Start difference. First operand 16500 states and 23392 transitions. Second operand 10 states.