/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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:11:51,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:11:51,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:11:51,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:11:51,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:11:51,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:11:51,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:11:51,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:11:51,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:11:51,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:11:51,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:11:51,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:11:51,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:11:51,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:11:51,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:11:51,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:11:51,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:11:51,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:11:51,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:11:51,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:11:51,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:11:51,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:11:51,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:11:51,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:11:51,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:11:51,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:11:51,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:11:51,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:11:51,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:11:51,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:11:51,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:11:51,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:11:51,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:11:51,825 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:11:51,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:11:51,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:11:51,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:11:51,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:11:51,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:11:51,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:11:51,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:11:51,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:11:51,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:11:51,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:11:51,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:11:51,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:11:51,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:11:51,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:11:51,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:11:51,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:11:51,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:11:51,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:11:51,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:11:51,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:11:51,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:11:52,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:11:52,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:11:52,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:11:52,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:11:52,264 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:11:52,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:11:52,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44bdb2834/4da21b262cdc489e879fd202aa80f57b/FLAG8e99c6ac6 [2020-12-22 10:11:53,416 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:11:53,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:11:53,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44bdb2834/4da21b262cdc489e879fd202aa80f57b/FLAG8e99c6ac6 [2020-12-22 10:11:53,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44bdb2834/4da21b262cdc489e879fd202aa80f57b [2020-12-22 10:11:53,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:11:53,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:11:53,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:11:53,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:11:53,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:11:53,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:11:53" (1/1) ... [2020-12-22 10:11:53,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa77cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:53, skipping insertion in model container [2020-12-22 10:11:53,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:11:53" (1/1) ... [2020-12-22 10:11:53,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:11:54,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:11:54,522 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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label05.c[20609,20622] [2020-12-22 10:11:54,647 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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label05.c[27302,27315] [2020-12-22 10:11:55,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:11:55,696 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:11:55,775 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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label05.c[20609,20622] [2020-12-22 10:11:55,800 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/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label05.c[27302,27315] [2020-12-22 10:11:56,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:11:56,503 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:11:56,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56 WrapperNode [2020-12-22 10:11:56,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:11:56,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:11:56,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:11:56,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:11:56,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:56,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:56,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:11:56,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:11:56,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:11:56,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:11:57,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:57,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:57,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:57,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:57,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:57,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:57,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (1/1) ... [2020-12-22 10:11:57,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:11:57,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:11:57,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:11:57,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:11:57,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (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 10:11:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:11:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:11:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:11:57,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:12:03,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:12:03,348 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:12:03,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:03 BoogieIcfgContainer [2020-12-22 10:12:03,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:12:03,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:12:03,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:12:03,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:12:03,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:11:53" (1/3) ... [2020-12-22 10:12:03,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3f92b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:03, skipping insertion in model container [2020-12-22 10:12:03,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:56" (2/3) ... [2020-12-22 10:12:03,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3f92b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:12:03, skipping insertion in model container [2020-12-22 10:12:03,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:12:03" (3/3) ... [2020-12-22 10:12:03,361 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 10:12:03,367 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:12:03,382 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:12:03,401 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:12:03,435 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:12:03,435 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:12:03,435 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:12:03,435 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:12:03,436 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:12:03,436 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:12:03,436 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:12:03,436 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:12:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:12:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:03,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:03,483 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] [2020-12-22 10:12:03,484 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2020-12-22 10:12:03,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:03,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39133901] [2020-12-22 10:12:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:03,812 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 10:12:03,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39133901] [2020-12-22 10:12:03,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:03,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:03,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957583316] [2020-12-22 10:12:03,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:12:03,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:12:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:12:03,840 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 2 states. [2020-12-22 10:12:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:03,934 INFO L93 Difference]: Finished difference Result 1832 states and 3466 transitions. [2020-12-22 10:12:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:12:03,935 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:12:03,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:03,978 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:12:03,978 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:12:03,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:12:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:12:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:12:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:12:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1655 transitions. [2020-12-22 10:12:04,117 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1655 transitions. Word has length 42 [2020-12-22 10:12:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:04,117 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1655 transitions. [2020-12-22 10:12:04,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:12:04,117 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1655 transitions. [2020-12-22 10:12:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:12:04,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:04,127 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] [2020-12-22 10:12:04,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:12:04,128 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:12:04,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:04,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188588207] [2020-12-22 10:12:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:04,312 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 10:12:04,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188588207] [2020-12-22 10:12:04,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:04,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:12:04,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289715526] [2020-12-22 10:12:04,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:12:04,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:04,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:12:04,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:12:04,317 INFO L87 Difference]: Start difference. First operand 879 states and 1655 transitions. Second operand 5 states. [2020-12-22 10:12:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:04,464 INFO L93 Difference]: Finished difference Result 952 states and 1769 transitions. [2020-12-22 10:12:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:12:04,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:12:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:04,470 INFO L225 Difference]: With dead ends: 952 [2020-12-22 10:12:04,470 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:12:04,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:12:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:12:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:12:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:12:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1605 transitions. [2020-12-22 10:12:04,493 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1605 transitions. Word has length 42 [2020-12-22 10:12:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:04,493 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1605 transitions. [2020-12-22 10:12:04,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:12:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1605 transitions. [2020-12-22 10:12:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 10:12:04,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:04,495 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] [2020-12-22 10:12:04,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:12:04,496 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1236816549, now seen corresponding path program 1 times [2020-12-22 10:12:04,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:04,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212609873] [2020-12-22 10:12:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:04,669 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 10:12:04,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212609873] [2020-12-22 10:12:04,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:04,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:12:04,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445997701] [2020-12-22 10:12:04,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:04,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:04,672 INFO L87 Difference]: Start difference. First operand 879 states and 1605 transitions. Second operand 3 states. [2020-12-22 10:12:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:10,806 INFO L93 Difference]: Finished difference Result 2383 states and 4478 transitions. [2020-12-22 10:12:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:10,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 10:12:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:10,818 INFO L225 Difference]: With dead ends: 2383 [2020-12-22 10:12:10,818 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:12:10,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 10:12:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:12:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:12:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:12:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2584 transitions. [2020-12-22 10:12:10,869 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2584 transitions. Word has length 60 [2020-12-22 10:12:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:10,870 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2584 transitions. [2020-12-22 10:12:10,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2584 transitions. [2020-12-22 10:12:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:10,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:10,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:10,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:12:10,874 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:12:10,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:10,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348982475] [2020-12-22 10:12:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:11,028 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 10:12:11,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348982475] [2020-12-22 10:12:11,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:11,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:11,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662099286] [2020-12-22 10:12:11,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:11,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:11,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:11,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:11,032 INFO L87 Difference]: Start difference. First operand 1630 states and 2584 transitions. Second operand 3 states. [2020-12-22 10:12:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:11,085 INFO L93 Difference]: Finished difference Result 1762 states and 2794 transitions. [2020-12-22 10:12:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:11,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:11,097 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 10:12:11,097 INFO L226 Difference]: Without dead ends: 1693 [2020-12-22 10:12:11,099 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 10:12:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-12-22 10:12:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1691. [2020-12-22 10:12:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2020-12-22 10:12:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2682 transitions. [2020-12-22 10:12:11,146 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2682 transitions. Word has length 91 [2020-12-22 10:12:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:11,147 INFO L481 AbstractCegarLoop]: Abstraction has 1691 states and 2682 transitions. [2020-12-22 10:12:11,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2682 transitions. [2020-12-22 10:12:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:11,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:11,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:11,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:12:11,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:11,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:12:11,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:11,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8784131] [2020-12-22 10:12:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:11,250 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 10:12:11,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8784131] [2020-12-22 10:12:11,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:11,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:11,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608619663] [2020-12-22 10:12:11,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:11,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:11,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:11,254 INFO L87 Difference]: Start difference. First operand 1691 states and 2682 transitions. Second operand 3 states. [2020-12-22 10:12:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:11,307 INFO L93 Difference]: Finished difference Result 1939 states and 3078 transitions. [2020-12-22 10:12:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:11,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:11,319 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 10:12:11,319 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 10:12:11,320 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 10:12:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 10:12:11,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1807. [2020-12-22 10:12:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1807 states. [2020-12-22 10:12:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2867 transitions. [2020-12-22 10:12:11,371 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2867 transitions. Word has length 91 [2020-12-22 10:12:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:11,372 INFO L481 AbstractCegarLoop]: Abstraction has 1807 states and 2867 transitions. [2020-12-22 10:12:11,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2867 transitions. [2020-12-22 10:12:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:11,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:11,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:11,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:12:11,374 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:12:11,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:11,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694643187] [2020-12-22 10:12:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:11,465 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 10:12:11,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694643187] [2020-12-22 10:12:11,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:11,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:11,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510699989] [2020-12-22 10:12:11,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:11,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:11,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:11,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:11,468 INFO L87 Difference]: Start difference. First operand 1807 states and 2867 transitions. Second operand 3 states. [2020-12-22 10:12:11,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:11,525 INFO L93 Difference]: Finished difference Result 2275 states and 3613 transitions. [2020-12-22 10:12:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:11,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:11,537 INFO L225 Difference]: With dead ends: 2275 [2020-12-22 10:12:11,538 INFO L226 Difference]: Without dead ends: 2029 [2020-12-22 10:12:11,539 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 10:12:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-12-22 10:12:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2027. [2020-12-22 10:12:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-12-22 10:12:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3215 transitions. [2020-12-22 10:12:11,597 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3215 transitions. Word has length 91 [2020-12-22 10:12:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:11,597 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 3215 transitions. [2020-12-22 10:12:11,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3215 transitions. [2020-12-22 10:12:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:11,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:11,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:11,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:12:11,600 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:12:11,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:11,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872826184] [2020-12-22 10:12:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:11,680 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 10:12:11,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872826184] [2020-12-22 10:12:11,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:11,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:11,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208938272] [2020-12-22 10:12:11,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:11,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:11,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:11,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:11,683 INFO L87 Difference]: Start difference. First operand 2027 states and 3215 transitions. Second operand 3 states. [2020-12-22 10:12:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:11,742 INFO L93 Difference]: Finished difference Result 2911 states and 4617 transitions. [2020-12-22 10:12:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:11,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:11,756 INFO L225 Difference]: With dead ends: 2911 [2020-12-22 10:12:11,756 INFO L226 Difference]: Without dead ends: 2445 [2020-12-22 10:12:11,759 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 10:12:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2020-12-22 10:12:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2443. [2020-12-22 10:12:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2020-12-22 10:12:11,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3867 transitions. [2020-12-22 10:12:11,893 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3867 transitions. Word has length 91 [2020-12-22 10:12:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:11,893 INFO L481 AbstractCegarLoop]: Abstraction has 2443 states and 3867 transitions. [2020-12-22 10:12:11,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3867 transitions. [2020-12-22 10:12:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:11,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:11,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:11,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:12:11,896 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:12:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:11,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749787591] [2020-12-22 10:12:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:11,981 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 10:12:11,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749787591] [2020-12-22 10:12:11,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:11,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:11,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176753340] [2020-12-22 10:12:11,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:11,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:11,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:11,984 INFO L87 Difference]: Start difference. First operand 2443 states and 3867 transitions. Second operand 3 states. [2020-12-22 10:12:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:12,066 INFO L93 Difference]: Finished difference Result 4111 states and 6493 transitions. [2020-12-22 10:12:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:12,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:12:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:12,084 INFO L225 Difference]: With dead ends: 4111 [2020-12-22 10:12:12,085 INFO L226 Difference]: Without dead ends: 3229 [2020-12-22 10:12:12,087 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 10:12:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-12-22 10:12:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3227. [2020-12-22 10:12:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3227 states. [2020-12-22 10:12:12,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 5083 transitions. [2020-12-22 10:12:12,200 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 5083 transitions. Word has length 91 [2020-12-22 10:12:12,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:12,201 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 5083 transitions. [2020-12-22 10:12:12,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:12,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 5083 transitions. [2020-12-22 10:12:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:12:12,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:12,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:12,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:12:12,204 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:12:12,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:12,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092124267] [2020-12-22 10:12:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:12,386 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 10:12:12,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092124267] [2020-12-22 10:12:12,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:12,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:12,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797244260] [2020-12-22 10:12:12,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:12,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:12,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:12,391 INFO L87 Difference]: Start difference. First operand 3227 states and 5083 transitions. Second operand 9 states. [2020-12-22 10:12:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:13,768 INFO L93 Difference]: Finished difference Result 26551 states and 41609 transitions. [2020-12-22 10:12:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:12:13,769 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:12:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:13,888 INFO L225 Difference]: With dead ends: 26551 [2020-12-22 10:12:13,888 INFO L226 Difference]: Without dead ends: 24885 [2020-12-22 10:12:13,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:12:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24885 states. [2020-12-22 10:12:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24885 to 4891. [2020-12-22 10:12:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4891 states. [2020-12-22 10:12:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 7627 transitions. [2020-12-22 10:12:14,519 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 7627 transitions. Word has length 91 [2020-12-22 10:12:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:14,519 INFO L481 AbstractCegarLoop]: Abstraction has 4891 states and 7627 transitions. [2020-12-22 10:12:14,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 7627 transitions. [2020-12-22 10:12:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:14,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:14,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:14,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:12:14,522 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:14,522 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:12:14,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:14,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117092975] [2020-12-22 10:12:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:14,611 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 10:12:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117092975] [2020-12-22 10:12:14,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:14,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:14,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736431981] [2020-12-22 10:12:14,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:14,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:14,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:14,614 INFO L87 Difference]: Start difference. First operand 4891 states and 7627 transitions. Second operand 3 states. [2020-12-22 10:12:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:15,040 INFO L93 Difference]: Finished difference Result 11199 states and 17325 transitions. [2020-12-22 10:12:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:15,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:15,061 INFO L225 Difference]: With dead ends: 11199 [2020-12-22 10:12:15,061 INFO L226 Difference]: Without dead ends: 7869 [2020-12-22 10:12:15,069 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 10:12:15,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2020-12-22 10:12:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7803. [2020-12-22 10:12:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:12:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11947 transitions. [2020-12-22 10:12:15,572 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11947 transitions. Word has length 93 [2020-12-22 10:12:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:15,572 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11947 transitions. [2020-12-22 10:12:15,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11947 transitions. [2020-12-22 10:12:15,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:15,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:15,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:15,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:12:15,575 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:15,575 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:12:15,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:15,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329345340] [2020-12-22 10:12:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:15,864 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 10:12:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329345340] [2020-12-22 10:12:15,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:15,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:15,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152808476] [2020-12-22 10:12:15,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:15,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:15,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:15,867 INFO L87 Difference]: Start difference. First operand 7803 states and 11947 transitions. Second operand 9 states. [2020-12-22 10:12:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:16,893 INFO L93 Difference]: Finished difference Result 14047 states and 21421 transitions. [2020-12-22 10:12:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:16,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:12:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:16,913 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 10:12:16,914 INFO L226 Difference]: Without dead ends: 7805 [2020-12-22 10:12:16,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:12:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-12-22 10:12:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2020-12-22 10:12:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:12:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11883 transitions. [2020-12-22 10:12:17,333 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11883 transitions. Word has length 93 [2020-12-22 10:12:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:17,334 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11883 transitions. [2020-12-22 10:12:17,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11883 transitions. [2020-12-22 10:12:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:12:17,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:17,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:17,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:12:17,336 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:17,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:12:17,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:17,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387266005] [2020-12-22 10:12:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:17,421 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 10:12:17,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387266005] [2020-12-22 10:12:17,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:17,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:17,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055057096] [2020-12-22 10:12:17,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:17,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:17,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:17,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:17,423 INFO L87 Difference]: Start difference. First operand 7803 states and 11883 transitions. Second operand 3 states. [2020-12-22 10:12:18,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:18,056 INFO L93 Difference]: Finished difference Result 19519 states and 29421 transitions. [2020-12-22 10:12:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:18,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:12:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:18,089 INFO L225 Difference]: With dead ends: 19519 [2020-12-22 10:12:18,089 INFO L226 Difference]: Without dead ends: 13277 [2020-12-22 10:12:18,103 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 10:12:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2020-12-22 10:12:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13275. [2020-12-22 10:12:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13275 states. [2020-12-22 10:12:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13275 states to 13275 states and 19883 transitions. [2020-12-22 10:12:19,144 INFO L78 Accepts]: Start accepts. Automaton has 13275 states and 19883 transitions. Word has length 93 [2020-12-22 10:12:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:19,144 INFO L481 AbstractCegarLoop]: Abstraction has 13275 states and 19883 transitions. [2020-12-22 10:12:19,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 13275 states and 19883 transitions. [2020-12-22 10:12:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:12:19,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:19,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:19,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:12:19,147 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:19,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:19,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:12:19,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:19,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625801202] [2020-12-22 10:12:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:19,302 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 10:12:19,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625801202] [2020-12-22 10:12:19,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:19,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:12:19,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466704792] [2020-12-22 10:12:19,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:12:19,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:12:19,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:12:19,311 INFO L87 Difference]: Start difference. First operand 13275 states and 19883 transitions. Second operand 8 states. [2020-12-22 10:12:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:20,962 INFO L93 Difference]: Finished difference Result 22017 states and 32667 transitions. [2020-12-22 10:12:20,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:12:20,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:12:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:21,011 INFO L225 Difference]: With dead ends: 22017 [2020-12-22 10:12:21,012 INFO L226 Difference]: Without dead ends: 22015 [2020-12-22 10:12:21,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22015 states. [2020-12-22 10:12:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22015 to 13659. [2020-12-22 10:12:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13659 states. [2020-12-22 10:12:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 20203 transitions. [2020-12-22 10:12:22,025 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 20203 transitions. Word has length 94 [2020-12-22 10:12:22,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:22,026 INFO L481 AbstractCegarLoop]: Abstraction has 13659 states and 20203 transitions. [2020-12-22 10:12:22,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:12:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 20203 transitions. [2020-12-22 10:12:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:12:22,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:22,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:12:22,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:12:22,028 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:12:22,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:22,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119666984] [2020-12-22 10:12:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:22,092 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 10:12:22,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119666984] [2020-12-22 10:12:22,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:22,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:12:22,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006625315] [2020-12-22 10:12:22,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:12:22,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:22,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:12:22,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:12:22,095 INFO L87 Difference]: Start difference. First operand 13659 states and 20203 transitions. Second operand 3 states. [2020-12-22 10:12:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:23,126 INFO L93 Difference]: Finished difference Result 25954 states and 38385 transitions. [2020-12-22 10:12:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:12:23,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:12:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:23,168 INFO L225 Difference]: With dead ends: 25954 [2020-12-22 10:12:23,168 INFO L226 Difference]: Without dead ends: 19295 [2020-12-22 10:12:23,183 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 10:12:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19295 states. [2020-12-22 10:12:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19295 to 19293. [2020-12-22 10:12:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19293 states. [2020-12-22 10:12:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 28333 transitions. [2020-12-22 10:12:24,404 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 28333 transitions. Word has length 95 [2020-12-22 10:12:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:24,404 INFO L481 AbstractCegarLoop]: Abstraction has 19293 states and 28333 transitions. [2020-12-22 10:12:24,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:12:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 28333 transitions. [2020-12-22 10:12:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:24,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:24,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:24,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:12:24,417 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:12:24,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:24,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973921725] [2020-12-22 10:12:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:12:24,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973921725] [2020-12-22 10:12:24,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:24,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:24,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545709838] [2020-12-22 10:12:24,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:24,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:24,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:24,608 INFO L87 Difference]: Start difference. First operand 19293 states and 28333 transitions. Second operand 9 states. [2020-12-22 10:12:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:30,591 INFO L93 Difference]: Finished difference Result 146861 states and 214197 transitions. [2020-12-22 10:12:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:30,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:30,852 INFO L225 Difference]: With dead ends: 146861 [2020-12-22 10:12:30,852 INFO L226 Difference]: Without dead ends: 129131 [2020-12-22 10:12:30,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129131 states. [2020-12-22 10:12:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129131 to 37021. [2020-12-22 10:12:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37021 states. [2020-12-22 10:12:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37021 states to 37021 states and 53997 transitions. [2020-12-22 10:12:34,163 INFO L78 Accepts]: Start accepts. Automaton has 37021 states and 53997 transitions. Word has length 129 [2020-12-22 10:12:34,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:34,164 INFO L481 AbstractCegarLoop]: Abstraction has 37021 states and 53997 transitions. [2020-12-22 10:12:34,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 37021 states and 53997 transitions. [2020-12-22 10:12:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:34,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:34,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:34,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:12:34,178 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:34,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:12:34,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:34,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815884538] [2020-12-22 10:12:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:12:34,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815884538] [2020-12-22 10:12:34,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:34,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:34,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505650483] [2020-12-22 10:12:34,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:34,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:34,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:34,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:34,477 INFO L87 Difference]: Start difference. First operand 37021 states and 53997 transitions. Second operand 9 states. [2020-12-22 10:12:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:42,451 INFO L93 Difference]: Finished difference Result 164589 states and 239861 transitions. [2020-12-22 10:12:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:42,457 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:42,793 INFO L225 Difference]: With dead ends: 164589 [2020-12-22 10:12:42,793 INFO L226 Difference]: Without dead ends: 146859 [2020-12-22 10:12:42,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146859 states. [2020-12-22 10:12:47,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146859 to 63645. [2020-12-22 10:12:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63645 states. [2020-12-22 10:12:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63645 states to 63645 states and 92333 transitions. [2020-12-22 10:12:47,775 INFO L78 Accepts]: Start accepts. Automaton has 63645 states and 92333 transitions. Word has length 129 [2020-12-22 10:12:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:47,775 INFO L481 AbstractCegarLoop]: Abstraction has 63645 states and 92333 transitions. [2020-12-22 10:12:47,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 63645 states and 92333 transitions. [2020-12-22 10:12:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:47,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:47,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:47,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:12:47,790 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:12:47,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:47,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119314113] [2020-12-22 10:12:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:12:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119314113] [2020-12-22 10:12:47,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:47,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:47,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062992902] [2020-12-22 10:12:47,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:47,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:48,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:48,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:48,151 INFO L87 Difference]: Start difference. First operand 63645 states and 92333 transitions. Second operand 9 states. [2020-12-22 10:12:57,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:57,389 INFO L93 Difference]: Finished difference Result 182317 states and 265525 transitions. [2020-12-22 10:12:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:57,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:57,609 INFO L225 Difference]: With dead ends: 182317 [2020-12-22 10:12:57,610 INFO L226 Difference]: Without dead ends: 164587 [2020-12-22 10:12:57,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164587 states. [2020-12-22 10:13:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164587 to 81373. [2020-12-22 10:13:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81373 states. [2020-12-22 10:13:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81373 states to 81373 states and 117997 transitions. [2020-12-22 10:13:03,746 INFO L78 Accepts]: Start accepts. Automaton has 81373 states and 117997 transitions. Word has length 129 [2020-12-22 10:13:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:03,747 INFO L481 AbstractCegarLoop]: Abstraction has 81373 states and 117997 transitions. [2020-12-22 10:13:03,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 81373 states and 117997 transitions. [2020-12-22 10:13:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:03,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:03,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:03,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:13:03,767 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:13:03,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:03,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167985579] [2020-12-22 10:13:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:13:03,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167985579] [2020-12-22 10:13:03,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:03,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:03,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615055034] [2020-12-22 10:13:03,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:03,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:03,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:03,939 INFO L87 Difference]: Start difference. First operand 81373 states and 117997 transitions. Second operand 9 states. [2020-12-22 10:13:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:15,126 INFO L93 Difference]: Finished difference Result 200045 states and 291189 transitions. [2020-12-22 10:13:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:15,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:15,405 INFO L225 Difference]: With dead ends: 200045 [2020-12-22 10:13:15,405 INFO L226 Difference]: Without dead ends: 182315 [2020-12-22 10:13:15,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182315 states. [2020-12-22 10:13:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182315 to 99101. [2020-12-22 10:13:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99101 states. [2020-12-22 10:13:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99101 states to 99101 states and 143661 transitions. [2020-12-22 10:13:23,082 INFO L78 Accepts]: Start accepts. Automaton has 99101 states and 143661 transitions. Word has length 129 [2020-12-22 10:13:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:23,083 INFO L481 AbstractCegarLoop]: Abstraction has 99101 states and 143661 transitions. [2020-12-22 10:13:23,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 99101 states and 143661 transitions. [2020-12-22 10:13:23,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:23,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:23,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:23,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:13:23,097 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:23,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:23,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:13:23,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:23,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120859312] [2020-12-22 10:13:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:13:23,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120859312] [2020-12-22 10:13:23,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:23,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:23,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504312211] [2020-12-22 10:13:23,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:23,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:23,502 INFO L87 Difference]: Start difference. First operand 99101 states and 143661 transitions. Second operand 9 states. [2020-12-22 10:13:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:37,581 INFO L93 Difference]: Finished difference Result 217773 states and 316853 transitions. [2020-12-22 10:13:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:37,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:37,927 INFO L225 Difference]: With dead ends: 217773 [2020-12-22 10:13:37,927 INFO L226 Difference]: Without dead ends: 200043 [2020-12-22 10:13:38,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200043 states. [2020-12-22 10:13:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200043 to 116829. [2020-12-22 10:13:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116829 states. [2020-12-22 10:13:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116829 states to 116829 states and 169325 transitions. [2020-12-22 10:13:47,403 INFO L78 Accepts]: Start accepts. Automaton has 116829 states and 169325 transitions. Word has length 129 [2020-12-22 10:13:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:47,404 INFO L481 AbstractCegarLoop]: Abstraction has 116829 states and 169325 transitions. [2020-12-22 10:13:47,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 116829 states and 169325 transitions. [2020-12-22 10:13:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:47,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:47,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:47,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:13:47,417 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:13:47,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:47,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025985726] [2020-12-22 10:13:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:13:47,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025985726] [2020-12-22 10:13:47,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:47,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:47,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990816553] [2020-12-22 10:13:47,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:47,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:47,616 INFO L87 Difference]: Start difference. First operand 116829 states and 169325 transitions. Second operand 9 states. [2020-12-22 10:13:47,889 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-22 10:14:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:04,633 INFO L93 Difference]: Finished difference Result 235501 states and 342517 transitions. [2020-12-22 10:14:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:04,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:14:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:05,189 INFO L225 Difference]: With dead ends: 235501 [2020-12-22 10:14:05,190 INFO L226 Difference]: Without dead ends: 217771 [2020-12-22 10:14:05,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217771 states. [2020-12-22 10:14:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217771 to 134557. [2020-12-22 10:14:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134557 states. [2020-12-22 10:14:16,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134557 states to 134557 states and 194989 transitions. [2020-12-22 10:14:16,997 INFO L78 Accepts]: Start accepts. Automaton has 134557 states and 194989 transitions. Word has length 129 [2020-12-22 10:14:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:16,997 INFO L481 AbstractCegarLoop]: Abstraction has 134557 states and 194989 transitions. [2020-12-22 10:14:16,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 134557 states and 194989 transitions. [2020-12-22 10:14:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:14:17,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:17,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:17,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:14:17,019 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:14:17,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:17,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641014347] [2020-12-22 10:14:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:17,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641014347] [2020-12-22 10:14:17,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:17,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:17,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899542748] [2020-12-22 10:14:17,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:17,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:17,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:17,142 INFO L87 Difference]: Start difference. First operand 134557 states and 194989 transitions. Second operand 3 states. [2020-12-22 10:14:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:25,110 INFO L93 Difference]: Finished difference Result 226758 states and 329436 transitions. [2020-12-22 10:14:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:25,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:14:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:25,230 INFO L225 Difference]: With dead ends: 226758 [2020-12-22 10:14:25,230 INFO L226 Difference]: Without dead ends: 93764 [2020-12-22 10:14:25,287 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 10:14:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93764 states.